Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum.
Surgically placed electric conductors through which ELECTRIC STIMULATION is delivered to or electrical activity is recorded from a specific point inside the body.
Electrodes which can be used to measure the concentration of particular ions in cells, tissues, or solutions.
The study of chemical changes resulting from electrical action and electrical activity resulting from chemical changes.
The utilization of an electrical current to measure, analyze, or alter chemicals or chemical reactions in solution, cells, or tissues.
Electrodes with an extremely small tip, used in a voltage clamp or other apparatus to stimulate or record bioelectric potentials of single cells intracellularly or extracellularly. (Dorland, 28th ed)
Solution titration in which the end point is read from the electrode-potential variations with the concentrations of potential determining ions. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
An allotropic form of carbon that is used in pencils, as a lubricant, and in matches and explosives. It is obtained by mining and its dust can cause lung irritation.
Any of a variety of procedures which use biomolecular probes to measure the presence or concentration of biological molecules, biological structures, microorganisms, etc., by translating a biochemical interaction at the probe surface into a quantifiable physical signal.
Methods of creating machines and devices.
Use of electric potential or currents to elicit biological responses.
A yellow metallic element with the atomic symbol Au, atomic number 79, and atomic weight 197. It is used in jewelry, goldplating of other metals, as currency, and in dental restoration. Many of its clinical applications, such as ANTIRHEUMATIC AGENTS, are in the form of its salts.
Electronic hearing devices typically used for patients with normal outer and middle ear function, but defective inner ear function. In the COCHLEA, the hair cells (HAIR CELLS, VESTIBULAR) may be absent or damaged but there are residual nerve fibers. The device electrically stimulates the COCHLEAR NERVE to create sound sensation.
Determination of the quantity of a material present in a mixture by measurement of its effect on the electrical conductivity of the mixture. (Webster, 3d ed)
Surgical insertion of an electronic hearing device (COCHLEAR IMPLANTS) with electrodes to the COCHLEAR NERVE in the inner ear to create sound sensation in patients with residual nerve fibers.
The resistance to the flow of either alternating or direct electrical current.
Enzymes which are immobilized on or in a variety of water-soluble or water-insoluble matrices with little or no loss of their catalytic activity. Since they can be reused continuously, immobilized enzymes have found wide application in the industrial, medical and research fields.
A nonmetallic element with atomic symbol C, atomic number 6, and atomic weight [12.0096; 12.0116]. It may occur as several different allotropes including DIAMOND; CHARCOAL; and GRAPHITE; and as SOOT from incompletely burned fuel.
Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain.
The physical effects involving the presence of electric charges at rest and in motion.
Application of electric current in treatment without the generation of perceptible heat. It includes electric stimulation of nerves or muscles, passage of current into the body, or use of interrupted current of low intensity to raise the threshold of the skin to pain.
The evaluation of incidents involving the loss of function of a device. These evaluations are used for a variety of purposes such as to determine the failure rates, the causes of failures, costs of failures, and the reliability and maintainability of devices.
Electric power supply devices which convert biological energy, such as chemical energy of metabolism or mechanical energy of periodic movements, into electrical energy.
Therapy for MOVEMENT DISORDERS, especially PARKINSON DISEASE, that applies electricity via stereotactic implantation of ELECTRODES in specific areas of the BRAIN such as the THALAMUS. The electrodes are attached to a neurostimulator placed subcutaneously.
Abrupt changes in the membrane potential that sweep along the CELL MEMBRANE of excitable cells in response to excitation stimuli.
Recording of the changes in electric potential of muscle by means of surface or needle electrodes.
Inorganic compounds that contain tin as an integral part of the molecule.
Inorganic compounds that contain silver as an integral part of the molecule.
The study of the generation and behavior of electrical charges in living organisms particularly the nervous system and the effects of electricity on living organisms.
Platinum. A heavy, soft, whitish metal, resembling tin, atomic number 78, atomic weight 195.09, symbol Pt. (From Dorland, 28th ed) It is used in manufacturing equipment for laboratory and industrial use. It occurs as a black powder (platinum black) and as a spongy substance (spongy platinum) and may have been known in Pliny's time as "alutiae".
A technique of measuring the dielectric properties of materials, which vary over a range of frequencies depending on the physical properties of the material. The technique involves measuring, over a range of frequencies, ELECTRICAL IMPEDANCE and phase shift of an electric field as it passes through the material.
Determination, by measurement or comparison with a standard, of the correct value of each scale reading on a meter or other measuring instrument; or determination of the settings of a control device that correspond to particular values of voltage, current, frequency or other output.
Potential cavity which separates the ARACHNOID MATER from the DURA MATER.
Computer-assisted processing of electric, ultrasonic, or electronic signals to interpret function and activity.
A polyvinyl resin used extensively in the manufacture of plastics, including medical devices, tubing, and other packaging. It is also used as a rubber substitute.
Inorganic salts of the hypothetical acid ferrocyanic acid (H4Fe(CN)6).
An enzyme of the oxidoreductase class that catalyzes the conversion of beta-D-glucose and oxygen to D-glucono-1,5-lactone and peroxide. It is a flavoprotein, highly specific for beta-D-glucose. The enzyme is produced by Penicillium notatum and other fungi and has antibacterial activity in the presence of glucose and oxygen. It is used to estimate glucose concentration in blood or urine samples through the formation of colored dyes by the hydrogen peroxide produced in the reaction. (From Enzyme Nomenclature, 1992) EC
Nanometer-sized tubes composed mainly of CARBON. Such nanotubes are used as probes for high-resolution structural and chemical imaging of biomolecules with ATOMIC FORCE MICROSCOPY.
An electrical current applied to the HEART to terminate a disturbance of its rhythm, ARRHYTHMIAS, CARDIAC. (Stedman, 25th ed)
The lower chamber of the COCHLEA, extending from the round window to the helicotrema (the opening at the apex that connects the PERILYMPH-filled spaces of scala tympani and SCALA VESTIBULI).
The study, control, and application of the conduction of ELECTRICITY through gases or vacuum, or through semiconducting or conducting materials. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Medical devices which substitute for a nervous system function by electrically stimulating the nerves directly and monitoring the response to the electrical stimulation.
Destruction by passage of a galvanic electric current, as in disintegration of a chemical compound in solution.
Hard, amorphous, brittle, inorganic, usually transparent, polymerous silicate of basic oxides, usually potassium or sodium. It is used in the form of hard sheets, vessels, tubing, fibers, ceramics, beads, etc.
Artificial device such as an externally-worn camera attached to a stimulator on the RETINA, OPTIC NERVE, or VISUAL CORTEX, intended to restore or amplify vision.
The perceived attribute of a sound which corresponds to the physical attribute of intensity.
The analysis of a chemical substance by inserting a sample into a carrier stream of reagent using a sample injection valve that propels the sample downstream where mixing occurs in a coiled tube, then passes into a flow-through detector and a recorder or other data handling device.
Electrical responses recorded from nerve, muscle, SENSORY RECEPTOR, or area of the CENTRAL NERVOUS SYSTEM following stimulation. They range from less than a microvolt to several microvolts. The evoked potential can be auditory (EVOKED POTENTIALS, AUDITORY), somatosensory (EVOKED POTENTIALS, SOMATOSENSORY), visual (EVOKED POTENTIALS, VISUAL), or motor (EVOKED POTENTIALS, MOTOR), or other modalities that have been reported.
The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH = log 1/2[1/(H+)], where (H+) is the hydrogen ion concentration in gram equivalents per liter of solution. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
An electrochemical technique for measuring the current that flows in solution as a function of an applied voltage. The observed polarographic wave, resulting from the electrochemical response, depends on the way voltage is applied (linear sweep or differential pulse) and the type of electrode used. Usually a mercury drop electrode is used.
Artificially produced membranes, such as semipermeable membranes used in artificial kidney dialysis (RENAL DIALYSIS), monomolecular and bimolecular membranes used as models to simulate biological CELL MEMBRANES. These membranes are also used in the process of GUIDED TISSUE REGENERATION.
The research and development of ELECTRICAL EQUIPMENT AND SUPPLIES for such medical applications as diagnosis, therapy, research, anesthesia control, cardiac control, and surgery. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
A general term for the complete loss of the ability to hear from both ears.
Concentration or quantity that is derived from the smallest measure that can be detected with reasonable certainty for a given analytical procedure.
Coating with a metal or alloy by electrolysis.
Elements of limited time intervals, contributing to particular results or situations.
A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).
Techniques used mostly during brain surgery which use a system of three-dimensional coordinates to locate the site to be operated on.
Silver. An element with the atomic symbol Ag, atomic number 47, and atomic weight 107.87. It is a soft metal that is used medically in surgical instruments, dental prostheses, and alloys. Long-continued use of silver salts can lead to a form of poisoning known as ARGYRIA.
The ability of a substrate to allow the passage of ELECTRONS.
Removal of tissue with electrical current delivered via electrodes positioned at the distal end of a catheter. Energy sources are commonly direct current (DC-shock) or alternating current at radiofrequencies (usually 750 kHz). The technique is used most often to ablate the AV junction and/or accessory pathways in order to interrupt AV conduction and produce AV block in the treatment of various tachyarrhythmias.
A metallic element with the atomic symbol Ir, atomic number 77, and atomic weight 192.22.
The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)
The voltage differences across a membrane. For cellular membranes they are computed by subtracting the voltage measured outside the membrane from the voltage measured inside the membrane. They result from differences of inside versus outside concentration of potassium, sodium, chloride, and other ions across cells' or ORGANELLES membranes. For excitable cells, the resting membrane potentials range between -30 and -100 millivolts. Physical, chemical, or electrical stimuli can make a membrane potential more negative (hyperpolarization), or less negative (depolarization).
A highly miniaturized version of ELECTROPHORESIS performed in a microfluidic device.
Devices that control the supply of electric current for running electrical equipment.
A technique in which electric pulses of intensity in kilovolts per centimeter and of microsecond-to-millisecond duration cause a temporary loss of the semipermeability of CELL MEMBRANES, thus leading to ion leakage, escape of metabolites, and increased uptake by cells of drugs, molecular probes, and DNA.
The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)
Characteristics or attributes of the outer boundaries of objects, including molecules.
The electric response evoked in the CEREBRAL CORTEX by ACOUSTIC STIMULATION or stimulation of the AUDITORY PATHWAYS.
The scientific discipline concerned with the physiology of the nervous system.
Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).
Lens-shaped structure on the inner aspect of the INTERNAL CAPSULE. The SUBTHALAMIC NUCLEUS and pathways traversing this region are concerned with the integration of somatic motor function.
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
Nanometer-scale wires made of materials that conduct electricity. They can be coated with molecules such as antibodies that will bind to proteins and other substances.
Diamond. A crystalline form of carbon that occurs as hard, colorless or tinted isomeric crystals. It is used as a precious stone, for cutting glass, and as bearings for delicate mechanisms. (From Grant & Hackh's Chemical Dictionary, 5th ed)
The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM.
A treatment modality that uses pulsed electrical currents to permeabilize cell membranes (ELECTROPORATION) and thereby enhance the uptake of chemotherapeutic agents, vaccines, or genes into the body's cells.
Energy transmitted from the sun in the form of electromagnetic radiation.
Procedures for correcting HEARING DISORDERS.
The part of the inner ear (LABYRINTH) that is concerned with hearing. It forms the anterior part of the labyrinth, as a snail-like structure that is situated almost horizontally anterior to the VESTIBULAR LABYRINTH.
A disorder characterized by recurrent episodes of paroxysmal brain dysfunction due to a sudden, disorderly, and excessive neuronal discharge. Epilepsy classification systems are generally based upon: (1) clinical features of the seizure episodes (e.g., motor seizure), (2) etiology (e.g., post-traumatic), (3) anatomic site of seizure origin (e.g., frontal lobe seizure), (4) tendency to spread to other structures in the brain, and (5) temporal patterns (e.g., nocturnal epilepsy). (From Adams et al., Principles of Neurology, 6th ed, p313)
An impulse-conducting system composed of modified cardiac muscle, having the power of spontaneous rhythmicity and conduction more highly developed than the rest of the heart.
Regulation of the rate of contraction of the heart muscles by an artificial pacemaker.
Either of a pair of compound bones forming the lateral (left and right) surfaces and base of the skull which contains the organs of hearing. It is a large bone formed by the fusion of parts: the squamous (the flattened anterior-superior part), the tympanic (the curved anterior-inferior part), the mastoid (the irregular posterior portion), and the petrous (the part at the base of the skull).
A computer based method of simulating or analyzing the behavior of structures or components.
Electrical devices that are composed of semiconductor material, with at least three connections to an external electronic circuit. They are used to amplify electrical signals, detect signals, or as switches.
The propagation of the NERVE IMPULSE along the nerve away from the site of an excitation stimulus.
The audibility limit of discriminating sound intensity and pitch.
Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant & Hackh's Chemical Dictionary, 5th ed, p301, p499)
Use of sound to elicit a response in the nervous system.
Artificial substitutes for body parts, and materials inserted into tissue for functional, cosmetic, or therapeutic purposes. Prostheses can be functional, as in the case of artificial arms and legs, or cosmetic, as in the case of an artificial eye. Implants, all surgically inserted or grafted into the body, tend to be used therapeutically. IMPLANTS, EXPERIMENTAL is available for those used experimentally.
A device designed to stimulate, by electric impulses, contraction of the heart muscles. It may be temporary (external) or permanent (internal or internal-external).
The ability of a substrate to retain an electrical charge.
The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the visual pathways.
Imaging techniques used to colocalize sites of brain functions or physiological activity with brain structures.
The science pertaining to the interrelationship of psychologic phenomena and the individual's response to the physical properties of sound.
Any visible result of a procedure which is caused by the procedure itself and not by the entity being analyzed. Common examples include histological structures introduced by tissue processing, radiographic images of structures that are not naturally present in living tissue, and products of chemical reactions that occur during analysis.
A genus of gram-negative, anaerobic, metal-reducing bacteria in the family Geobacteraceae. They have the ability to oxidize a variety of organic compounds, including AROMATIC HYDROCARBONS.
Therapeutic introduction of ions of soluble salts into tissues by means of electric current. In medical literature it is commonly used to indicate the process of increasing the penetration of drugs into surface tissues by the application of electric current. It has nothing to do with ION EXCHANGE; AIR IONIZATION nor PHONOPHORESIS, none of which requires current.
Fields representing the joint interplay of electric and magnetic forces.
Theoretical representations that simulate the behavior or activity of the neurological system, processes or phenomena; includes the use of mathematical equations, computers, and other electronic equipment.
The time from the onset of a stimulus until a response is observed.
The use of specifically placed small electrodes to deliver electrical impulses across the SKIN to relieve PAIN. It is used less frequently to produce ANESTHESIA.
The development and use of techniques to study physical phenomena and construct structures in the nanoscale size range or smaller.

Competitive mechanisms subserve attention in macaque areas V2 and V4. (1/2220)

It is well established that attention modulates visual processing in extrastriate cortex. However, the underlying neural mechanisms are unknown. A consistent observation is that attention has its greatest impact on neuronal responses when multiple stimuli appear together within a cell's receptive field. One way to explain this is to assume that multiple stimuli activate competing populations of neurons and that attention biases this competition in favor of the attended stimulus. In the absence of competing stimuli, there is no competition to be resolved. Accordingly, attention has a more limited effect on the neuronal response to a single stimulus. To test this interpretation, we measured the responses of neurons in macaque areas V2 and V4 using a behavioral paradigm that allowed us to isolate automatic sensory processing mechanisms from attentional effects. First, we measured each cell's response to a single stimulus presented alone inside the receptive field or paired with a second receptive field stimulus, while the monkey attended to a location outside the receptive field. Adding the second stimulus typically caused the neuron's response to move toward the response that was elicited by the second stimulus alone. Then, we directed the monkey's attention to one element of the pair. This drove the neuron's response toward the response elicited when the attended stimulus appeared alone. These findings are consistent with the idea that attention biases competitive interactions among neurons, causing them to respond primarily to the attended stimulus. A quantitative neural model of attention is proposed to account for these results.  (+info)

Neural encoding in orbitofrontal cortex and basolateral amygdala during olfactory discrimination learning. (2/2220)

Orbitofrontal cortex (OFC) is part of a network of structures involved in adaptive behavior and decision making. Interconnections between OFC and basolateral amygdala (ABL) may be critical for encoding the motivational significance of stimuli used to guide behavior. Indeed, much research indicates that neurons in OFC and ABL fire selectively to cues based on their associative significance. In the current study recordings were made in each region within a behavioral paradigm that allowed comparison of the development of associative encoding over the course of learning. In each recording session, rats were presented with novel odors that were informative about the outcome of making a response and had to learn to withhold a response after sampling an odor that signaled a negative outcome. In some cases, reversal training was performed in the same session as the initial learning. Ninety-six of the 328 neurons recorded in OFC and 60 of the 229 neurons recorded in ABL exhibited selective activity during evaluation of the odor cues after learning had occurred. A substantial proportion of those neurons in ABL developed selective activity very early in training, and many reversed selectivity rapidly after reversal. In contrast, those neurons in OFC rarely exhibited selective activity during odor evaluation before the rats reached the criterion for learning, and far fewer reversed selectivity after reversal. The findings support a model in which ABL encodes the motivational significance of cues and OFC uses this information in the selection and execution of an appropriate behavioral strategy.  (+info)

Physiological properties of raphe magnus neurons during sleep and waking. (3/2220)

Neurons in the medullary raphe magnus (RM) that are important in the descending modulation of nociceptive transmission are classified by their response to noxious tail heat as ON, OFF, or NEUTRAL cells. Experiments in anesthetized animals demonstrate that RM ON cells facilitate and OFF cells inhibit nociceptive transmission. Yet little is known of the physiology of these cells in the unanesthetized animal. The first aim of the present experiments was to determine whether cells with ON- and OFF-like responses to noxious heat exist in the unanesthetized rat. Second, to determine if RM cells have state-dependent discharge, the activity of RM neurons was recorded during waking and sleeping states. Noxious heat applied during waking and slow wave sleep excited one group of cells (ON-U) in unanesthetized rats. Other cells were inhibited by noxious heat (OFF-U) applied during waking and slow wave sleep states in unanesthetized rats. NEUTRAL-U cells did not respond to noxious thermal stimulation applied during either slow wave sleep or waking. ON-U and OFF-U cells were more likely to respond to noxious heat during slow wave sleep than during waking and were least likely to respond when the animal was eating or drinking. Although RM cells rarely respond to innocuous stimulation applied during anesthesia, ON-U and OFF-U cells were excited and inhibited, respectively, by innocuous somatosensory stimulation in the unanesthetized rat. The spontaneous activity of >90% of the RM neurons recorded in the unanesthetized rat was influenced by behavioral state. OFF-U cells discharged sporadically during waking but were continuously active during slow wave sleep. By contrast, ON-U and NEUTRAL-U cells discharged in bursts during waking and either ceased to discharge entirely or discharged at a low rate during slow wave sleep. We suggest that OFF cell discharge functions to suppress pain-evoked reactions during sleep, whereas ON cell discharge facilitates pain-evoked responses during waking.  (+info)

MST neuronal responses to heading direction during pursuit eye movements. (4/2220)

As you move through the environment, you see a radial pattern of visual motion with a focus of expansion (FOE) that indicates your heading direction. When self-movement is combined with smooth pursuit eye movements, the turning of the eye distorts the retinal image of the FOE but somehow you still can perceive heading. We studied neurons in the medial superior temporal area (MST) of monkey visual cortex, recording responses to FOE stimuli presented during fixation and smooth pursuit eye movements. Almost all neurons showed significant changes in their FOE selective responses during pursuit eye movements. However, the vector average of all the neuronal responses indicated the direction of the FOE during both fixation and pursuit. Furthermore, the amplitude of the net vector increased with increasing FOE eccentricity. We conclude that neuronal population encoding in MST might contribute to pursuit-tolerant heading perception.  (+info)

Visuomotor processing as reflected in the directional discharge of premotor and primary motor cortex neurons. (5/2220)

Premotor and primary motor cortical neuronal firing was studied in two monkeys during an instructed delay, pursuit tracking task. The task included a premovement "cue period," during which the target was presented at the periphery of the workspace and moved to the center of the workspace along one of eight directions at one of four constant speeds. The "track period" consisted of a visually guided, error-constrained arm movement during which the animal tracked the target as it moved from the central start box along a line to the opposite periphery of the workspace. Behaviorally, the animals tracked the required directions and speeds with highly constrained trajectories. The eye movements consisted of saccades to the target at the onset of the cue period, followed by smooth pursuit intermingled with saccades throughout the cue and track periods. Initially, an analysis of variance (ANOVA) was used to test for direction and period effects in the firing. Subsequently, a linear regression analysis was used to fit the average firing from the cue and track periods to a cosine model. Directional tuning as determined by a significant fit to the cosine model was a prominent feature of the discharge during both the cue and track periods. However, the directional tuning of the firing of a single cell was not always constant across the cue and track periods. Approximately one-half of the neurons had differences in their preferred directions (PDs) of >45 degrees between cue and track periods. The PD in the cue or track period was not dependent on the target speed. A second linear regression analysis based on calculation of the preferred direction in 20-ms bins (i.e., the PD trajectory) was used to examine on a finer time scale the temporal evolution of this change in directional tuning. The PD trajectories in the cue period were not straight but instead rotated over the workspace to align with the track period PD. Both clockwise and counterclockwise rotations occurred. The PD trajectories were relatively straight during most of the track period. The rotation and eventual convergence of the PD trajectories in the cue period to the preferred direction of the track period may reflect the transformation of visual information into motor commands. The widely dispersed PD trajectories in the cue period would allow targets to be detected over a wide spatial aperture. The convergence of the PD trajectories occurring at the cue-track transition may serve as a "Go" signal to move that was not explicitly supplied by the paradigm. Furthermore, the rotation and convergence of the PD trajectories may provide a mechanism for nonstandard mapping. Standard mapping refers to a sensorimotor transformation in which the stimulus is the object of the reach. Nonstandard mapping is the mapping of an arbitrary stimulus into an arbitrary movement. The shifts in the PD may allow relevant visual information from any direction to be transformed into an appropriate movement direction, providing a neural substrate for nonstandard stimulus-response mappings.  (+info)

Fatal outcome arising from use of a sutureless "corkscrew" epicardial pacing electrode inserted into apex of left ventricle. (6/2220)

A 59-year-old man is described in whom the insertion of an epicardial sutureless "corkscrew" electrode resulted in fatal ventricular perforation. Fatal myocardial perforation can occur with this electrode and the apex of the left ventricle should never be used as the site of insertion. Necropsy also showed that the transvenous right ventricular electrode, inserted one year previously, had penetrated a tricuspid leaflet. This could have accounted for the ensuing pacing failure.  (+info)

Gating of transmission in climbing fibre paths to cerebellar cortical C1 and C3 zones in the rostral paramedian lobule during locomotion in the cat. (7/2220)

1. Climbing fibre field potentials evoked by low intensity (non-noxious) electrical stimulation of the ipsilateral superficial radial nerve have been recorded in the rostral paramedian lobule (PML) in awake cats. Chronically implanted microwires were used to monitor the responses at eight different C1 and C3 zone sites during quiet rest and during steady walking on a moving belt. The latency and other characteristics of the responses identified them as mediated mainly via the dorsal funiculus-spino-olivocerebellar path (DF-SOCP). 2. At each site, mean size of response (measured as the area under the field, in mV ms) varied systematically during the step cycle without parallel fluctuations in size of the peripheral nerve volley. Largest responses occurred overwhelmingly during the stance phase of the step cycle in the ipsilateral forelimb while smallest responses occurred most frequently during swing. 3. Simultaneous recording from pairs of C1 zone sites located in the anterior lobe (lobule V) and C1 or C3 zone sites in rostral PML revealed markedly different patterns of step-related modulation. 4. The findings shed light on the extent to which the SOCPs projecting to different parts of a given zone can be regarded as functionally uniform and have implications as to their reliability as channels for conveying peripheral signals to the cerebellum during locomotion.  (+info)

Effects of capsaicin pretreatment on expiratory laryngeal closure during pulmonary edema in lambs. (8/2220)

The present study, performed in nonsedated, conscious lambs, consisted of two parts. In the first part, we 1) examined for the first time whether a respiratory response to pulmonary C-fiber stimulation could be elicited in nonsedated newborns and 2) determined whether this response could be abolished by capsaicin pretreatment. Then, by using capsaicin-desensitized lambs, we studied whether pulmonary C fibers were involved in the sustained, active expiratory upper airway closure previously observed during pulmonary edema. Airflow and thyroarytenoid and inferior pharyngeal constrictor muscle electromyographic activities were recorded. In the first set of experiments, a 5-10 microg/kg capsaicin bolus intravenous injection in seven intact lambs consistently led to a typical pulmonary chemoreflex, showing that C fibers are functionally mature in newborn lambs. In the second series of experiments, eight lambs pretreated with 25-50 mg/kg subcutaneous capsaicin did not exhibit any respiratory response to 10-50 microg/kg intravenous capsaicin injection, implicating C fibers in the response. Finally, in the above capsaicin-desensitized lambs, we observed that halothane-induced high-permeability pulmonary edema did not cause the typical response of sustained expiratory upper airway closure seen in the intact lamb. We conclude that functionally mature C fibers are present and responsible for a pulmonary chemoreflex in response to capsaicin intravenous injection in nonsedated lambs. Capsaicin pretreatment abolishes this reflex. Furthermore, the sustained expiratory upper airway closure observed during halothane-induced pulmonary edema in intact nonsedated lambs appears to be related to a reflex involving stimulation of pulmonary C fibers.  (+info)

Invasive monitoring of brain activity by means of intracerebral electrodes is widely practiced to improve pre-surgical seizure onset zone localization in patients with medically refractory seizures. Stereo-Electroencephalography (SEEG) is mainly used to localize the epileptogenic zone and a precise knowledge of the location of the electrodes is expected to facilitate the recordings interpretation and the planning of resective surgery. However, the localization of intracerebral electrodes on post-implant acquisitions is usually time-consuming (i.e., manual segmentation), it requires advanced 3D visualization tools, and it needs the supervision of trained medical doctors in order to minimize the errors. In this paper we propose an automated segmentation algorithm specifically designed to segment SEEG contacts from a thresholded post-implant Cone-Beam CT volume (0.4 mm, 0.4 mm, 0.8 mm). The algorithm relies on the planned position of target and entry points for each electrode as a first estimation of
http://www.steves-digicams.com/microdrive.html The following came directly from IBM Support in answer to a user who was thinking about using the microdrive on a vacation in Napal: The Microdrive does need AIR to float the heads and typically above 10,000 ft the mass of the air is too low and the drive requires a pressurized environment similar to an aircraft or spacecraft. At high altitude the air bearings begin to loose support from the air molecules needed to provide the air bearing
Savage Alloy 25T/28T Microdrive BMX Sprocket. Out of Stock. All BMX sprockets are delivered free to the UK mainland*, 365 day returns & Price Match.
Comparison of proximally versus distally placed spatially distributed sequential stimulation electrodes in a dynamic knee extension task
An implantable medical electrical lead particularly for stimulation of the sacral nerves comprises a lead body extending between a distal end and a proximal end, and the distal end having at least one electrode of an electrode array extending longitudinally from the distal end toward the proximal end. The lead body at its proximal end may be coupled to a pulse generator, additional intermediate wiring, or other stimulation device. A fixation mechanism is formed on or integrally with the lead body proximal to the electrode array that is adapted to be implanted in and engage subcutaneous tissue, particularly muscle tissue, to inhibit axial movement of the lead body and dislodgement of the stimulation electrodes. The fixation mechanism comprises a M tine elements arrayed in a tine element array along a segment of the lead proximal to the stimulation electrode array. Each tine element comprises at least N flexible, pliant, tines, each tine having a tine width and thickness and extending through a tine
Manning and colleagues (2009) performed the following experiment: in the course of treatment for epilepsy, penetrating microwires were transiently implanted in 20 human patients during the clinical identification of seizure foci. Each patient participated in a spatial navigation task while single-neuron action potential (AP) firing rates and the surrounding LFPs were measured from an array of microwires throughout different brain sites. The firing rate of each neuron and the corresponding normalized PSD of the LFP were calculated in half-second epochs. For each epoch, the power in the PSD was extracted in five discrete frequency ranges: delta (2-4 Hz), theta (4-8 Hz), alpha (8-12 Hz), beta (12-30 Hz), and gamma (30-150 Hz). In addition, an estimate of the broadband power in the PSD, across all frequencies, was obtained from each epoch. The firing rate was then compared with each power spectral feature using a regression approach, and an associated significance level was estimated by resampling ...
Figure 1 illustrates the structure of each trial of the Sternberg task. We visually presented lists of one to four consonants. After a delay period, the subjects task was to indicate as rapidly as possible whether a probe item was on the list. We quantified the speed of the response by measuring the response time (RT). This task was administered to three subjects who had intracranial electrode arrays and one with depth electrodes. Each of these subjects performed the Sternberg task with very high accuracy; for subjects 1-4, accuracy was 86, 98, 97, and 96%, respectively. RT increased significantly with list length (LL) for all subjects (p , 0.005). This increase, approximated by the equation RT = a × LL + b msec, had coefficients (a, b) = (89, 817), (95, 1008), (40, 463), and (37, 353) for subjects 1-4, respectively. The differences in RTs between the first two and last two subjects was most likely a consequence of differences in the design of the trial structure (see Materials and ...
Polyfil is a leader in microwire and tube production for medical devices. Core capabilities include drawing, straightening, insulating, online galvanic plating, annealing, cutting, laser ablating and thin-wall tube fabrication. ...
EPICA was part of a very special recording session last week. |br /| Here is the result of which the band is very proud: |br /| |br /| http://youtu.be/PTuZByPYiWw|br /| |br /| This videoclip was
...Researchers have used zinc oxide microwires to significantly improve t...By applying mechanical strain to the microwires researchers at the Ge... By utilizing this effect we can enhance the external efficiency of t...Details of the research were reported in the Sept. 14 issue of the jou...,Zinc,oxide,microwires,improve,the,performance,of,light-emitting,diodes,biological,advanced biology technology,biology laboratory technology,biology device technology,latest biology technology
We have examined a number of safety issues associated with cochlear implants. This work has been primarily designed to evaluate the histopathological effects of intracochlear electrode implantation and chronic electrical stimulation. The results of these studies may be summarized as follows: 1) The insertion of the banded free-fit scala tympani array into human cadaver temporal bones produces minimal damage, occurring primarily to a localized region of the spiral ligament. This damage would not result in significant neural degeneration and thus, would not compromise the efficacy of the multiple channel device; 2) chronic intracochlear electrical stimulation for continuous periods of 500 to 2000 hours, using charge balanced biphasic current pulses developing charge densities of 18-32 }?C/cm2. geom./phase, does not adversely affect the spiral ganglion cell population; 3) labyrinthine infection severely reduces the viable spiral ganglion cell population; 4) the formation of new bone present in ...
ValuTrode Electrodes - Get the best prices on dura-stick electrodes, dynapak electrodes, iontophoresis devices electrodes, lead wires accessories, pals platinum electrodes, silver electrodes, sponge electrodes, uni-patch electrodes and valutrode electrodes including valutrode white foam top electrodes - 1-14in round, valutrode white fabric top electrodes 2in 2in square, valutrode white foam top electrode - 2in 2in square, valutrode white fabric top electrodes - 2in round, valutrode white fabric foam electrodes - 3 in. 5 in. rectangle, valutrode white fabric top electrodes - 1.5in 2.5in oval, valutrode white fabric top electrode - 3in 5in rectangle, valutrode white fabric top electrode - 1.5in 2.5in oval, white fabric round foam electrodes, valutrode white fabric top electrodes - 3in round, valutrode white fabric top electrode - 2in 4in oval and white fabric back electrodes - 4in 7in rectangle online at Medical Supplies & Equipment.
Systems and methods are disclosed for assessing electrode-tissue contact for tissue ablation. An exemplary electrode contact sensing system comprises an electrode housed within a distal portion of a catheter shaft. At least one electro-mechanical sensor is operatively associated with the electrode within the catheter shaft. The at least one electro-mechanical sensor is responsive to movement of the electrode by generating electrical signals corresponding to the amount of movement. The system may also include an output device electrically connected to the at least one electro-mechanical sensor. The output device receives the electrical signals for assessing a level of contact between the electrode and a tissue.
A self-curling sheet of a non-conductive material is biased to curl into a tight cylinder. Inwardly extending conductive members are disposed on the surface of the sheet forming the inside of the cylinder. Circumferentially separated longitudinal slices are made in the cylinder adjacent the conductive members forming spring members such that, as the sheet relaxes over time, the electrodes on the spring members engage and pierce a nerve surrounded by the cuff. The conductive segments may be electrically conductive for applying electrical impulses or fluid conductive for infusing medications. In use, a first edge of the self-curling sheet is disposed adjacent a nerve trunk which is to receive the cuff therearound. The self-curling sheet is controllably permitted to curl around the nerve into its original cylindrical shape. Over a period of a few days, electrodes riding on spring members formed by longitudinal slices into the cylinder are embedded in the nerve without damage to the perineurium membrane
Get the most from your R Series® resuscitation platform with OneStep Electrodes for adults and pediatrics. OneStep Complete Electrodes for adults offer high-current defibrillation and capture CPR quality. These electrodes can also be used for monitoring and for cardioversion, and to deliver constant-current pacing-without the need for a separate three-lead ECG cable.. OneStep Pediatric CPR Electrodes provide the only CPR support for children under 55 pounds, while also enabling defibrillation, pacing, and cardioversion. When pediatric electrodes are attached, the R Series automatically reduces the starting energy to 50 joules to ensure safe defibrillation.. OneStep Electrodes can remain pre-connected, even during a 30-joule shock test, because of a patented dual-circuit design. There is no need to disconnect the electrodes to test the defibrillator, meaning readiness is not compromised.. ...
A single-pass endocardial lead electrode adapted for implantation on or about the heart and for connection to a system for monitoring or stimulating cardiac activity including a lead body with a circumferential outer surface. The lead includes a first distal end electrode which has a first electrical conducting surface which is for positioning within the ventricle of the heart. The lead body also has a second electrode which has a second electrical conducting surface adapted for positioning within the atrium of the heart. Both of the first and the second electrodes are adapted for positioning and fixation to the wall. An active fixation element is used as part of the second electrode. The lead body also includes a curved portion which facilitates the positioning and fixing of the second electrode. In another embodiment, the main lead body includes a recess into which an atrial lead body and the active fixation element attached to one end can travel from a recessed position to a position for fixation to
A microdrive apparatus useful in human stereotactic surgery is disclosed. Such apparatus permits safe and accurate placement of a surgical instrument, such as a cannula, into a portion of the central nervous system, e.g. the brain and spinal cord, of a patient by simple mechanical operation.
Researchers have used zinc oxide microwires to significantly improve the efficiency at which gallium nitride light-emitting diodes (LED) convert electricity to ultraviolet light. The devices are believed to be the first LEDs ...
Cardiology Specialty Multi-Function Electrodes, with a low viscosity gel that provides the best skin coupling, are designed to virtually eliminate dermal damage in special procedure areas of the hospital.. Radiolucent Multi-Function Electrodes are designed to provide an unobstructed view of the coronary arteries during x-ray studies. Available in solid or liquid gel.. Biphasic Multi-Function Electrodes are part of the complete Rectilinear Biphasic™ system -ZOLLs breakthrough technology-proven to achieve superior results in cardioversion of atrial fibrillation. Lower energy levels combined with the unique liquid gel technology virtually eliminate post-procedural dermal damage.. Sterile Multi-Function Electrodes, with a unique two-pouch system that allows placement of the posterior electrode prior to surgery, are optimal for use in the operating room. They are also available with 10-foot (3-meter) lead wires.. Pacing Only Electrodes are long-term pacing electrodes proven to work with ZOLLs ...
A flexible transcutaneous electrical nerve and/or muscle stimulation electrode is provided which utilizes a conductive material, preferably a conductive fabric, and electrical shunt means disposed along the conductive material for causing more uniform resistivity between any two equally spaced apart points on the conductive material than without the electrical shunt means. Further adjustment of the electrical conductivity may also be achieved by varying the conductivity of individual fibers utilized in the conductive fabric.
Electrode combinations.Red electrodes are used for current injunction, and green electrodes are used for voltage measurement. The combinations can be divided in
1] Bredeson, S. D., & Troyk, P. R. (2014). Device for the implantation of neural electrode arrays. 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. [2] McCreery, DB; LA Bullara, SH Waldron, Electrode insertion tool. U.S. Patent 6304785, Oct 16 2001 [3] Normann, RA; EM Maynard, PJ Rousche, DJ Warren, A neural interface for a cortical vision prosthesis. Vision Research, vol. 39, no. 15, pp. 2577-87, Jul 1999.. [4] Troyk, PR; D Frim, B Roitberg, VL Towle, K Takahashi, S Suh, M Bak, SD Bredeson, Z Hu, Implantation and testing of WFMA stimulators in macaque, 38th Annual International Conference of the IEEE EMBS, Aug 2016.. [5] Tawakol, O., Bredeson, S. D., & Troyk, P. R. (2016). Preparation of a neural electrode implantation device for in-vivo surgical use. 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). ...
A neural stimulation system automatically corrects or adjusts the stimulus magnitude (stimulation energy) in order to maintain a comfortable and effective stimulation therapy. Because the changes in impedance associated with the electrode-tissue interface can indicate obstruction of current flow and positional lead displacement, lead impedance can indicate the quantity of electrical stimulation energy that should be delivered to the target neural tissue to provide corrective adjustment. Hence, a change in impedance or morphology of an impedance curve may be used in a feedback loop to indicate that the stimulation energy needs to be adjusted and the system can effectively auto correct the magnitude of stimulation energy to maintain a desired therapeutic effect.
A microelectronic switch having a substrate layer, an electrically conductive switching layer formed on the substrate layer, an electrically conductive cavity layer formed on the switching layer, an electrically conductive cap layer formed on the cavity layer, the cap layer forming a first electrode and a second electrode that are physically and electrically separated one from another, and which both at least partially overlie the switching layer, and a cavity disposed between the switching layer and the second electrode, where the switching is layer is flexible to make electrical contact with the second electrode by flexing through the cavity upon selective application of an electrical bias.
A cardiac stimulation system includes multiple electrodes and a cardiac stimulator for generating stimulation pulses. The electrodes are mounted on a tube and stimulation electrodes are designated whi
Medtronic 4195 Active Fixation LV lead and Medtronic passive fixation LV lead arms will both have same follow-up testing and schedule. Medtronic 4195 active fixation LV lead and Medtronic passive fixation LV lead : 1:1 randomization between Medtronic active fixation 4195 LV lead and another FDA approved passive fixation Medtronic LV lead. Fluoroscopic images will be taken at implant in a supine position and again at 3 month follow-up in different postural positions with capture thresholds of the LV lead taken at each postural position.. ...
To simulate the electrode we add a small section to serve as the electrode resistance and capacitance */ /* watch out when changing Ra in the model since this electrode.Ra is used for the series resistance! */ begintemplate Electrode public electrode create electrode // c (pf) = cm*area = PI*L*diam*(.01) * cm // rs (MOhm) = Ra*L/2 / (PI*diam^2/4) = 2*L/PI/diam^2 * (.01) * Ra // so it is nice to have // PI*L*diam*.01 = 1 // 2*L/PI/diam^2*.01 = 1 // diam = (2/PI^2)^(1/3) // L = 1/.01/PI/diam proc init_electrode() { electrode { diam = (2/PI^2)^(1/3) L = 1/.01/PI/diam insert pas g_pas = 0 e_pas = 0 } } proc init() { init_electrode() electrode Ra = 0.001 //(Ohm*cm) electrode cm = 0 //(uF/cm2) connect electrode(0), $1 } //electrode makeppm() endtemplate Electrode objref se,pe,te soma se=new Electrode(0.5) priden[0] pe=new Electrode(1) se.electrode.Ra = 1.2 se.electrode.cm = 1e-6 pe.electrode.Ra = 17.5 pe.electrode.cm = 2.95 access soma tstop=15 ...
Cardiac lead implantation systems and methods including an electronics arrangement provided with a user interface and a coupler assembly. A coupler body is configured to detachably grasp a cardiac lead and couple with electrical contacts of the cardiac lead. A user interface includes an output indicative of sensed cardiac parameters, such as one or both of cardiac signal amplitude and lead electrode impedance, and may include an audio output device and/or a visual output device. Methods of lead implantation involve advancing a cardiac lead into proximity with a patients heart, and contacting cardiac tissue with an electrode arrangement to locate a suitable implant location. Sensing of one or more cardiac parameters is accomplished and an audible representation of the sensed parameters is produced, the audible representation varying as the electrode arrangement is moved relative to the cardiac tissue.
A defibrillation pulse generator and lead system particularly adapted to allow for implant in a single incision and subcutaneous pocket. The electrode system consists of a right ventricular electrode and a combined, subcutaneously implanted pulse generator housing and flexible periprerally extending electrode. The flexible electrode extends in a generally co-planar relation with respect to the major surfaces of the device housing and may comprise a plurality of electrode segments electrically connected in common with the device housing and distributed over a flexible electrode pad.
An apparatus for stimulating and sensing evoked response to stimulus in the heart. First and second electrodes are in electrical contact with the heart, a third indifferent electrode is also in electrical contact with the heart. A pacemaker provides stimulus signals through the electrodes in the stimulating mode of operation. The first and second electrodes are switched through switching apparatus wherein in the first mode the first and second electrodes are maintained at equal electrical potentials, and in a second, sensing mode, the switch operates between the first and second electrodes so as to allow the first and second electrodes to act as bipolar sensing leads. Evoked response is sensed by a differential amplifier having a first differential input connected to the first electrode and a second differential input connected to the second electrode. The differential amplifier provides a differential signal which is proportional to the evoked cardiac response.
An ablation apparatus has an introducer including an introducer lumen, a proximal portion and a distal portion. Two or more electrodes are at least partially positionable in the introducer lumen. Each electrode is configured to be advanced from the introducer distal portion in a deployed state into a selected tissue site to define a volumetric ablation volume. A fluid delivery member is positioned on at least a portion of an exterior of one of the electrodes. The fluid delivery member is configured to be coupled to a fluid medium source. A cable is coupled to the electrodes.
An electrode array is a configuration of electrodes used for measuring either an electric current or voltage. Some electrode arrays can operate in a bidirectional fashion, in that they can also be used to provide a stimulating pattern of electric current or voltage. Common arrays include: * Schlumberger (Wenner) * Wenner alpha * Wenner beta * Wenner gamma * Pole-pole * Dipole-dipole * Pole-dipole * Equatorial dipole-dipole (en) ...
Cyberkinetics, Inc, winner of the Medgadget Most Sci-Fi Sounding Company Name Award, has asked the FDA for permission to market their nerve growth stimulation system.
A high-density multichannel microwire electrode array is disclosed. The array can comprise a variable number of electrodes. A method of assembling the array is further disclosed. Additionally, a plurality of devices employing the array are disclosed, including an intelligent brain pacemaker and a closed loop brain machine interface.
Computer-based, 64-channel device specifically designed for multi-channel microelectrode arrays, including impedance measurement, automated electroplating, site activation and site rejuvenation. For use with Neuralynxs Tetrode Assembly Station.. ...
The Lund researchers tailored electrodes-which they call 3D electrodes-are unique in that they are extremely soft and flexible in all three dimensions, in a way that enables stable recordings from the neurons over a long time.. The electrode is so soft that it deflects against a water surface. In order to implant such electrodes, the researchers have developed a technique for encapsulating the electrodes in a hard but dissolvable gelatine material that is also very gentle on the brain.. This technology retains the electrodes in their original form inside the brain and can monitor what happens inside virtually undisturbed and normally functioning brain tissue, says Johan Agorelius, a doctoral student in the project.. Until now, developed flexible electrodes have not been able to maintain their shape when implanted, which is why they have been fixated on a solid chip that limits their flexibility, among other things. Other types of electrodes that are used are much stiffer. The result in both ...
14th Symposium on Fuel Cell and Battery Modelling and Experimental Validation (ModVal 14), Karlsruhe, Germany (03/2017), Book of ...
New medical devices to help amputees or people with paralysis could be possible with an Anglo-American advance in recording brain activity at scale.
tens unit electrodes pads and electronic muscle stimulation electrodes - tens electrodes, lectron gel, leads, TENS Books and downloads
A removable medical electrode system for monitoring electrical activity of selected tissue comprises a flexible member (22) of electrically insulating material shaped to conform to a surface of the tissue (20). It includes a mechanism (32, 34) for articulating the electrode (10) between an expanded and contracted position to place and remove the electrode (10) on the tissue (20), and to hold the electrode (10) in place during an operation. An electrical conductor (42) is fixed to the electrode (10) to carry electrical impulse signals from the nerve tissue (20) to a monitoring system.
The electrodes in their 6 pin version are not significantly bigger than the bipolar pacemaker electrodes with IS-1 connector used presently on the market. This was achieved by a new circular...
Electrophysiological signals recorded in deep structures of the human brain are of key interest to the neuroscientific community. For instance, in Parknsons Disease, the beta-rhythm plays a role that has been shown to be tightly coupled with the expression of clinical symptoms (such as bradykinesia). For instance, enhanced beta band activity is suppressed by levodopa [Geng et al., 2017; Kühn et al., 2006a, 2006b, 2009] and during DBS [Eusebio et al., 2011; Kühn et al., 2008] in parallel with improvement of motor symptoms.. DBS is a treatment option that gives us a unique opportunity to record from deep structures in the brain. However, in each patient, usually, only one or two DBS electrodes are surgically implanted. Common electrodes are composed of four contacts - so in each electrode/hemisphere, one may record from three bipolar channels. Already, this gives great insight into rhythmic activity in the basal ganglia as shown in manifold publications.. However, it would be great to be able ...
This is most the important factor and inadequate cooling is the most frequent cause of electrode life problems. It must be attended to first. Typically 4 l/min of water flow through the electrodes is recommended for uncoated, thin steel sheet and 6 or more l/min for coated and thicker steels. An inlet temperature not exceeding 20°C is recommended and outlet temperature not exceeding 30°C. The electrode diameter should be a minimum of 2.5 to 3 times the tip diameter to increase the effectiveness of cooling. The cooling tube should be cut at 45° and directed on the inside face of the electrode. It is important to check that blockages or back pressure on the outlet do not affect the flow rate. When using female caps, the holder should be drilled through to direct water onto the electrode itself. ...
0138]However, the electrode combination can be shifted distally, i.e., upward in the orientation of FIG. 7. There is room on leads 26A, 26B to shift the electrode combination distally by two shift positions. Hence, if the initial position is shift position 1, shifts can be made to shift position 2 and shift position 3. Each shift may represent a shift in the position of the active electrodes associated with the previous electrode combination such that the electrical stimulation pattern remains identical or substantially similar, e.g., in terms of relative positions and spacing between the active electrodes in both the initial and shifted electrode combination. In addition, the initial and shifted electrode combinations have a common number of electrodes. In the example of FIG. 7, each electrode combination has three electrodes (110C, 110D, and 112C for the first combination), and the electrode combinations have a substantially similar electrode pattern. Active electrodes are those electrodes ...
The purpose of this project is to study live recordings from neuronal population of the human nucleus accumbens during the implantation of deep brain stimulation (DBS) electrodes for the treatment-resistant obsessive compulsive disorder (OCD). The central aim of this project is to determine if intra-operative electrophysiological data can confirm that the electrode is located in the nucleus accumbens. This confirmation could allow the placement of the DBS electrodes with a higher degree of precision. An additional aim of this project will be to study the activity of the neuronal population of the nucleus accumbens while a subject is presented with a task involving an unexpected reward.. The investigators central hypothesis is that unexpected reward will be associated with increase firing and synchrony in the neuronal population. This will translate into recordable increase activity in the investigators region of interest and therefore confirm the proper placement of the electrode.. This study ...
0269] 100: NMP, 101: graphene or RGO, 102: graphene oxide, 200: positive electrode, 201: positive electrode current collector, 202: positive electrode active material layer, 203: positive electrode active material particle, 204: graphene, 300: secondary battery, 301: positive electrode can, 302: negative electrode can, 303: gasket, 304: positive electrode, 305: positive electrode current collector, 306: positive electrode active material layer, 307: negative electrode, 308: negative electrode current collector, 309: negative electrode active material layer, 310: separator, 401: container, 402: graphene oxide dispersion liquid, 403: formation subject, 404: conductor, 405: container, 406: electrolyte solution, 407: conductor, 408: counter electrode, 500: secondary battery, 501: positive electrode current collector, 502: positive electrode active material layer, 503: positive electrode, 504: negative electrode current collector, 505: negative electrode active material layer, 506: negative ...
People suffering from certain types of arrhythmia may benefit from the implantation of a cardiac pacemaker. Pacemakers artificially stimulate the heart by applying short electrical pulses to the cardiac tissue to restore and maintain a steady heart rhythm. By adjusting the pulse delivery rate the heart is stimulated to beat at desired pace. The stimulation pulses are transferred from the pacemaker to the heart via an electrode, which is implanted into the cardiac tissue. Additionally, the electrode must also sense the cardiac response and transfer those signals back to the electronics in the pacemaker for processing. The communication between the electrode and the tissue takes place on the electrode/electrolyte (tissue) interface. This interface serves as the contact point where the electronic current in the electrode is converted to ionic currents capable to operate in the body. The stimulation/sensing signals are transferred across the interface via three electrochemical mechanisms: i) ...
Gamma activity in the subthalamic nucleus (STN) is widely viewed as a pro-kinetic rhythm. Here we test the hypothesis that rather than being specifically linked to movement execution, gamma activity reflects dynamic processing in this nucleus. We investigated the role of gamma during fast stopping and recorded scalp electroencephalogram and local field potentials from deep brain stimulation electrodes in 9 Parkinsons disease patients. Patients interrupted finger tapping (paced by a metronome) in response to a stop-signal sound, which was timed such that successful stopping would occur only in ~50% of all trials. STN gamma (60-90 Hz) increased most strongly when the tap was successfully stopped, whereas phase-based connectivity between the contralateral STN and motor cortex decreased. Beta or theta power seemed less directly related to stopping. In summary, STN gamma activity may support flexible motor control as it did not only increase during movement execution but also during rapid action-stopping.
The technician will give you specific instructions on how to set up the Loop recorder monitor at home. ILRs can be active for up to 3-4 years, at which time you can choose to remove or leave the device under the skin.. A copy of the procedure and subsequent checks of the device information will be sent to your referring doctor and copies placed in your medical history.. Implantable loop recorders are routinely checked every 6 months. Peninsula Heart Centre will notify you if there are any heart rate or rhythm issues detected during the period of monitoring thereafter. ...
Deep brain stimulation (DBS) has been shown to be clinically effective for some forms of treatment-resistant chronic pain, but the precise mechanisms of action are not well understood. Here, we present an analysis of magnetoencephalography (MEG) data from a patient with whole-body chronic pain, in order to investigate changes in neural activity induced by DBS for pain relief over both short- and long-term. This patient is one of the few cases treated using DBS of the anterior cingulate cortex (ACC). We demonstrate that a novel method, null-beamforming, can be used to localise accurately brain activity despite the artefacts caused by the presence of DBS electrodes and stimulus pulses. The accuracy of our source localisation was verified by correlating the predicted DBS electrode positions with their actual positions. Using this beamforming method, we examined changes in whole-brain activity comparing pain relief achieved with deep brain stimulation (DBS ON) and compared with pain experienced with no
How to Apply sEMG Electrodes The MyoTrac Muscle Monitor ships with a starter package of 3 Triode electrodes. If you want to use a different electrode configuration than the Triode Electrode Pad provides, you can order an Extender Cable.. In order to allow bilateral placement on the same muscle group an Extender Cable (available in lengths of 40 or 21) is available. This extender cable plugs into the end of the Triode Electrode head that ships with the MyoTrac and allows a strip of 3 electrodes to be used together for a Frontalis placement or separated for placements on other muscles bilaterally (such as the temporalis, masseter, trapezius, etc. muscle groups).. We have created a series of illustrations to clarify the process preparing the electrodes for placement. Both the Triode Electrode Pads and the Strip of 3 Electrodes are available in packages of 100. They both feature hypoallergenic adhesive surfaces and silver chloride electrodes that do not need gel applied. Both types of electrodes ...
What Holter, Event Loop Monitoring and Implantable Loop Recorders Are For Holter and event loop monitors are used to help detect a heart rhythm problem, such as a heart beat that is too fast, too slow or irregular. Holter monitors are portable devices that track your heart rhythm constantly for several days. The data it […]
A paddle-type electrode or electrode array is implantable like a percutaneously inserted lead, i.e., without requiring major surgery, and once implanted, expands to provide a platform for many electrode configurations. The electrode array is provided on a flexible, foldable, subcarrier or substrate. Such subcarrier or substrate folds or compresses during implantation, thereby facilitating its insertion using percutaneous implantation techniques and tools. Once implanted, such subcarrier or substrate expands, thereby placing the electrodes in a desired spaced-apart positional relationship, and thus achieving a desired electrode array configuration. A steering stylet may be accommodated in a lumen provided in the subcarrier or substrate. Insertion tools useful with such electrode arrays include a needle with an oblong cross-section, which accommodates the dimensions of the folded array, and also accommodates other electrode arrays that are not necessarily folded.
Biz bir bütün-kortikal electrocorticographic dizi sürekli korteks, şakak oksipital kutup ve frontal direkleri neredeyse tüm yan...
Integra Epilepsy Specialty Electrodes,Dual-sided, Interhemispheric Grid Electrode with 16 Contact Leads; Cortical Grid Electrode with 16 Contact Leads; Pediatric Grid Electrode with Flex Connector, 0.5 cm spacing,medicine,medical supply,medical supplies,medical product
Excellent lithium-storage performance of as-prepared Sb2S3 electrodes. a CV curves of Sb2S3-150 electrode for the first three cycles at a scan rate of 0.1 mV s-1. b Rate performance of Sb2S3-120, Sb2S3-150, and Sb2S3-180 electrodes at various current densities from 50 to 5000 mA g-1. c Selected charge/discharge voltage profiles of Sb2S3-150 electrode at different current densities (increased from 50 to 5000 mA g-1). d Cycling performance of Sb2S3-120, Sb2S3-150, and Sb2S3-180 electrodes at different current densities. e Selected charge/discharge voltage profiles of Sb2S3-150 electrode at a current density of 200 mA g-1. f Cycling performance of Sb2S3-120, Sb2S3-150, and Sb2S3-180 electrodes at a current density of 1000 mA g-1. g Three-dimensional Nyquist plots of Sb2S3-120, Sb2S3-150, and Sb2S3-180 electrodes at the open-circuit voltage. h Three-dimensional Nyquist plots of Sb2S3-120, Sb2S3-150 and Sb2S3-180 electrodes at a current density of 500 mA g-1 after 50 cycles. i the equivalent circuit ...
ICD-10-PCS. PACEMAKERS. Insertion or Replacement of Other (RA and RV) Lead. 37.71. Initial insertion of transvenous lead (electrode) into ventricle. ICD-9-CM. ICD-10-PCS. Implantation or Replacement of CRT-P Generator Only. 00.53. Implantation or replacement of cardiac resynchronization pacemaker, pulse 2015 procedure code crosswalk: icd-9-cm to icd-10-pcs - Medtronic Further inquiries on pacing at the bundle of His should be referred to Medtronic CRHF Office of Medical Affairs. Background pacemaker with transvenous electrode(s); atrial. Because the The ICD-10-PCS procedure coding would include both a generator insertion code and the appropriate number of codes for insertion pacing at the bundle of his - Medtronic ICD-9-CM. ICD-10-CM/PCS. 37.87. Replacement of any type pacemaker device with dual-chamber device. 0JH606Z. Insertion of pacemaker, single chamber into chest Replacement of transvenous atrial and/or ventricular lead(s). (electrode). 02H63JZ. Insertion of pacemaker lead into right ...
Figure 1 (Holtzheimer et al., 2012). Surgical targeting. Preoperative MRI shows the sagittal (A) and coronal (B) views of the planned optimal subcallosal cingulate (SCC) white matter target (red circle). The dotted black line indicates the subcallosal plane of interest, parallel to the anterior-posterior commissural line; the dotted white line indicates the rostral limit of the subcallosal plane; and the dotted red line indicates the midsubcallosal plane. The red circle indicates demarcation of the SCC white matter target and surrounding gray matter. C and D, Postoperative computed tomography scan merged with preoperative MRI showing a typical case with the deep brain stimulation electrodes in situ. Note that the contacts span the SCC gray and white matter in the vertical plane proximal to the split of the cingulum bundle and rostral medial frontal white matter tracts (C, red arrows, sagittal view). Contacts are numbered by convention (1-4 on the left, 5-8 on the right), inferior to superior. ...
An electrode assembly for an implantable medical device, including a spine, and a plurality of electrodes protruding from the spine. At least two electrodes protrude from the spine in opposing directions and define a nerve-receiving channel. When the electrode assembly is not coupled to a nerve and the electrodes are in a relaxed state position, the nerve receiving channel comprises a cross-sectional area that is substantially less than a cross-sectional area of a nerve to which the electrode assembly is adapted to be coupled. And when coupled to the nerve, each electrode wraps around and directly contacts at least 60% of the circumference of the nerve.
The Medical Electrodes Market may be divided by Type of Product, Type of Use, Type of Modality and the Area. The Medical Electrodes are the the rapeutic instruments that enable the transmission energy of ionic flows in the body into electrical currents that may be augmented, considered, and utilized for the analysis of the patients medicinal disorder. The creation of the medical electrode consists of lead, metal, and electrode leading platter. These instruments are joined with checking arrangements to deliver a constant checking of patients suffering as of numerous sicknesses and complaints.. The usage of medical electrodes is likely to upsurge in the nearby prospect. Due to the new-fangled medicinal uses, hitting great emphasis on primary analysis beside by innovative electro designs increasing market development. The area of North America leads the medical electrodes market, and is likely to continue its lead all through the prediction era, due to the greater speed of acceptance of medical ...
The neuroguide™ electrode introducer kit allows verification of expected Deep Brain Stimulation (DBS) electrode position relative to targeted anatomy using Magnetic Resonance Imaging (MRI).
Hamer et al retrospectively reviewed the records of all patients who underwent invasive monitoring with subdural grid electrodes (n = 198 monitoring sessions on 187 patients; median age: 24 years; range: 1 to 50 years) at the Cleveland Clinic Foundation from 1980 to 1997.. From 1980 to 1997, the complication rate decreased (p = 0.003). In the last 5 years, 19/99 patients (19%) had complications, including two patients (2%) with permanent sequelae. In the last 3 years, the complication rate was 13.5% (n = 5/37) without permanent deficits. Overall, complications occurred during 52 monitoring sessions (26.3%): infection (n = 24; 12.1%), transient neurologic deficit (n = 22; 11.1%), epidural hematoma (n = 5; 2.5%), increased intracranial pressure (n = 5; 2.5%), and infarction (n = 3; 1.5%). One patient (0.5%) died during grid insertion. Complication occurrence was associated with greater number of grids/electrodes (p = 0.021/p = 0.052; especially ,60 electrodes), longer duration of monitoring (p = ...
We have achieved selective nerve response from multi-contact cuff electrodes by demonstrating characteristic percept areas and thresholds for each contact. Selective sensory response remains consistent in two upper-limb amputees for 1 and 2 years, the longest multi-contact sensory feedback system to …
Convenient prices for electrode cream - conductive cream & lubricant for ECG, EEG & EMG examinations. Gentle on the skin & hypoallergenic.
The proof-of-concept design here demonstrates that water, including the surrounding fluid in submerged devices, can be used as compliant electrodes for DEAs. This design approach obviates the need for the use of hydrogel-, carbon-, or metal-based electrodes and potentially simplifies the design of actuators for submersible robots that can take advantage of the ground potential provided by the surrounding fluid. The results in fig. S3 show that FEDEAs can provide greater actuation amplitudes than non-prestrained actuators with carbon grease. When a bimorph with carbon grease electrodes is submerged in water, the maximum amplitude decreases by 46%. However, the amplitude is about two times larger for FEDEAs with USP-grade water compared with submerged carbon grease electrodes. This demonstrates that the actuation performance decreases when the actuators are submerged in water, but fluid electrodes provide comparable, if not improved, actuation performance over carbon grease electrodes when ...
A new perimodiolar electrode array, the curly-with stylet (CwS), has been developed and undergone safety trials in human cadaver temporal bones. The array was developed as a result of animal and modelling studies which indicated that there are potential advantages in situating the electrode array in closer proximity to the neural elements. Preliminary studies with four patients in Melbourne implanted with a developmental pre-curved array had supported the predictions of lower current requirements and possibly more focussed spread of excitation ...
Some applications require electrodes to be implanted in the animal's nervous system connected to a receiver which is usually ... Three electrodes are implanted; two in the ventral posterolateral nucleus of the thalamus which conveys facial sensory ... "There's got to be a level of discomfort in implanting these electrodes," he says, which may be difficult to justify. Talwar ... Spiny dogfish sharks have been remotely controlled by implanting electrodes deep in the shark's brain to a remote control ...
The electrodes are implanted as described above. The patient uses a hand-held magnet to turn on and turn off a pulse generator ... by turning off the implanted electrode. Batteries in the generator last about 5 years and can be replaced surgically. DBS is ... A low-frequency current is passed through the electrode to activate the tremor and to confirm proper placement. Once the site ... A small hole is drilled through the skull and a temperature-controlled electrode is inserted into the thalamus. ...
Book electrodes are still considered very bulky. Grill, W. M., Norman, S. E., & Bellamkonda, R. V. (2009). Implanted neural ... Since the electrode is sutured to the epineurium it is unlikely to damage the nerve trunk. Helicoidal electrodes are placed ... Each slot contains three platinum foils which function as electrodes, anode electrodes and one cathode. The spinal roots of the ... A wide variety of electrode designs have been researched, tested, and manufactured. These electrodes lie on a spectrum varying ...
Implanted in Nagle's right precentral gyrus (area of the motor cortex for arm movement), the 96-electrode BrainGate implant ... With electrodes also implanted into his wife's nervous system, they conducted the first direct electronic communication ... In addition, according to the research of Abdulkader et al., (2015), the body may not accept the implanted electrodes and this ... Invasive BCI requires surgery to implant electrodes under scalp for communicating brain signals. The main advantage is to ...
EEG and fMRI do not obtain as strong signals as direct electrode implant. Traditional myoelectric prostheses are unable to ... Response of brain tissue to chronically implanted neural electrodes. J Neurosci Methods. 2005 Oct 15;148(1):1-18. Schwartz AB, ... One hundred and fifteen electrodes were used to record EMG from the pectoral muscle; two electrodes were used to record from ... The electrodes were placed at a distance of 15mm from each other. To remove the artifact caused by body movement, the EMG ...
"Response of brain tissue to chronically implanted neural electrodes". Journal of Neuroscience Methods. 148 (1): 1-18. doi: ...
These electrodes emit high-frequency stimulation to the implanted areas. Bilateral implantation is necessary for symmetric ... An example of this therapy might involve implanting cells genetically modified to express tyrosine hydroxylase which, in the ... Deep brain stimulation involves inserting, via stereotaxic surgery, electrodes into the sensorimotor area of the brain. ...
He had DBS electrodes implanted bilaterally within his central thalamus. More specifically, the DBS electrodes targeted the ... Both electrodes were positioned within the central lateral nucleus, the paralaminar regions of the median dorsalis, and the ... a technique that supplies a small electric current in the brain with non-invasive electrodes, may improve the clinical state of ...
Conducting polymer electrodes for auditory brainstem implants; Journal of Materials Chemistry B. 2015. DOI : 10.1039/c5tb00099h ... "Conducting polymer electrodes for auditory brainstem implants". Journal of Materials Chemistry B. 3 (25): 5021-5027. doi: ... These 3D electrode channel devices fixed to polymer substrates not only provide an innovative tool for in vivo guided axon ... These tiny, flexible electrodes are inserted into cochlea, and deliver electrical pulses along the nerve to transduce sound ...
"Electrical stimulation with non-implanted electrodes for overactive bladder in adults". The Cochrane Database of Systematic ...
These consist of both internal implanted electrodes and magnets and external components. The quality of sound is different than ... A cochlear implant is surgical implantation of a battery powered electronic medical device in the inner ear. Unlike hearing ... In cases of profound or total deafness, a cochlear implant is a specialised hearing aid that may restore a functional level of ... Profound or total hearing loss may be amenable to management by cochlear implants, which stimulate cochlear nerve endings ...
In non-human animals, EEG signals are usually recorded using electrodes implanted in the brain; the majority of theta studies ... In contrast to the situation in rats, where long periods of theta oscillations are easily observed using electrodes implanted ... have involved electrodes implanted in the hippocampus. In humans, because invasive studies are not ethically permissible except ... on human hippocampal theta comes from a few small studies of epileptic patients with intracranially implanted electrodes used ...
The patients answered questions about their mood while the electrodes were implanted. Using the data about the mood and the ... They measured the brain activity of seven patients who had electrodes implanted in their brain to monitor epilepsy. ... "Brain-zapping implants that fight depression inch closer to reality". Science News. 2019-02-10. Retrieved 2019-11-22. Sani, ...
"Factors Affecting Outcomes in Cochlear Implant Recipients Implanted With a Perimodiolar Electrode Array Located in Scala ... Usually, the ENVp of the signal in each channel is transmitted to the implanted electrodes in the form an electrical pulses of ... ISBN 978-1-59756-652-0. Bierer JA, Faulkner KF (April 2010). "Identifying cochlear implant channels with poor electrode-neuron ... Some cochlear implant systems transmit information about TFSp in the channels of the cochlear implants that are tuned to low ...
Nine electrodes had previously been implanted on her skull: two in the front sinus, one in the somatic area, two in the ventral ... Hector had electrodes implanted on his skull so neurological activity could be monitored. Two further rockets with rat payloads ... The cats had electrodes implanted onto their skulls so their neurological activity could be monitored throughout the flight. ... Burgess and Dubbs believe this is due to photos of her with electrodes implanted on her skull and the new animal rights ...
The team is also considering implanting electrodes directly on nerves. Power Researchers are exploring a hydrogen-peroxide ... A wire coil wrapped over the shoulder supplies wireless power to the implants and relays signals to computers in the prosthetic ... and refine the bulky electrodes used to read electrical signals in muscles. Control System Researchers are experimenting with ...
Leads from the implanted defibrillator pass through a vein into the heart. The leads are attached to electrodes that monitor ... implanted the first AICD in a human patient in February 1980. At the time of the implantation, Mirowski and Mower had ... In fact, the implanted defibrillator system represents an imperfect solution in search of a plausible and practical application ... If something had gone awry, we would have never lived it down." After the device was implanted, physicians induced a cardiac ...
"Transcranial magnetic stimulation and extradural electrodes implanted on secondary auditory cortex for tinnitus suppression". ... investigating somatosensory cortex implants for deafferentation pain; investigating C2 implant for tinnitus, as well as for ... investigating dACC implants for alcohol addiction and OCD. "DSM staff profile". www.otago.ac.nz. Retrieved 2018-07-04. Ridder, ... investigating brain implants for tinnitus, on primary and secondary auditory cortex, frontal cortex, anterior cingulate cortex ...
He studied monkeys with electrodes implanted in the reticular system and also cortical electrodes. He used evoked responses to ...
The device is implanted into upper chest with the electrodes placed in the neck. First, an incision is made in the neck to ... a feature which is used in the initial implant procedure to aid positioning of the electrode. Despite modern medications ... The electrode is then sutured in place. The main part of the device (also called the pulse generator) is then placed in a ... The electrode is placed over the carotid artery and positioned where stimulating through it elicits a blood pressure reduction ...
"Rapid and accurate anatomical localization of implanted subdural electrodes in a virtual reality environment". J Neurol Surg a ...
The location where the electrodes are implanted depends on the neurological disorder being treated. The company Neuralink hopes ... that their DBS device will include "as many as 3072 electrodes distributed along 96 threads", and that the procedure to implant ... The neurostimulator is a thin wire with electrodes at its tip. Low levels of electric current are transmitted through the brain ... More complex medical devices can be implanted to treat psychological disorders and illnesses. Anna Wexler, a member of the ...
Believed to be psychotic, he is investigated and electrodes are implanted in his brain. The book continued the preoccupation in ... or The Terminal Man where unexpected behaviors are realized when electrodes are implanted into a person's brain. Mystery ...
Subcutaneous electrodes can be divided into percutaneous and implanted electrodes. The percutaneous electrodes consist of thin ... The other class of subcutaneous electrodes is implanted electrodes. These are permanently implanted in the consumer's body and ... Compared to surface stimulation electrodes, implanted and percutaneous electrodes potentially have higher stimulation ... The drawbacks of the implanted electrodes are they require an invasive surgical procedure to install, and, as is the case with ...
Başkent, Deniz; Shannon, Robert V. (March 2005). "Interactions between cochlear implant electrode insertion depth and frequency ... Later, Shannon has expanded his research to also include auditory brainstem implants and auditory midbrain implants. A key ... auditory brainstem implants, and midbrain implants. Shannon received his B.A. degrees in Mathematics and Psychology from the ... What this paper showed was that the limitation in spectral resolution was not caused by the limited number of electrodes, which ...
The implant consists of 60 electrodes, each 200 microns in diameter. The resolution of the 6 dot by 10 dot rectangular grid ... The implant is attached to the surface of the retina with a tack. The cables connecting the implant to the processor are run ... There is also a risk of bacterial infection from the implanted cables that connect the implant to the signal processor. The ... The processor is in turn connected by cables to the implant itself, which is surgically implanted on the surface of the ...
Spinal cord stimulators implanted spinal pumps[edit]. Spinal cord stimulators use electrodes placed adjacent to but outside the ... Implanted devices are expensive and carry the risk of complications. Available studies have focused on conditions having a ... Stimulation of the primary motor cortex through electrodes placed within the skull but outside the thick meningeal membrane ( ...
Therefore, it may be used in the electrodes and electronics of implants in living organisms. Schottky diode Semiconductor ... Holds Promise For Biomedical Implants". North Carolina State University Ioffe data archive v t e Salts and covalent derivatives ...
The patient, who had been arrested for marijuana possession, was implanted with electrodes into the septal region (associated ... Becker, Hal C. (1957). "A roentgenographic stereotaxic technique for implanting and maintaining electrodes in the brain of man ... He performed many experiments there involving electrical stimulation of the brain via surgically implanted electrodes. He ... The septal electrodes were then stimulated while he was shown heterosexual pornographic material. The patient was later ...
Of the more than 1,100 predicate implants that the new implants were substantially equivalent to, only 3% had any publicly ... The electrodes contact the heart directly through the chest, allowing stimulation pulses to pass through the body. Recipients ... implants, and prostheses. Items as intricate as housings for cochlear implants are manufactured through the deep drawn and ... New Health Hazard:Hackable Medical Implants. MSNBC.com's Technology *^ Camara, Carmen; Peris-Lopez, Pedro; Tapiador, Juan E. ( ...
Electrode movement is easy to find using a CT scan. There may also be complications of surgery, such as bleeding within the ... 2.0 2.1 U.S. Department of Health and Human Services.FDA approves implanted brain stimulator to control tremors. Retrieved ... Implant boosts activity in injured brain. Nature news (August 1, 2007). Retrieved on August 1, 2007 ... Because the brain can move a little during surgery, there is the possibility that the electrodes can move out of place. This ...
The first implant took place in March 1960, with two further implants the following month. These three patients made good ... After satisfactory lodgement of the electrode is confirmed, the opposite end of the electrode lead is connected to the ... The other end of a pacemaker lead is actually implanted into the heart muscle. In addition leads that have been implanted for a ... The first use of transvenous pacing in conjunction with an implanted pacemaker was by Parsonnet in the United States,[44][45][ ...
FDA Backgrounder on Platinum in Silicone Breast Implants. U.S. Food and Drug Administration. [2008-09-09]. (原始内容存档于2008-07-24). ... Platinized platinum electrodes. Chemical Reviews. 1971, 71 (2): 177. doi:10.1021/cr60270a002.. ... Platinum in silicone breast implants. Biomaterials. 2006, 27 (17): 3274-3286. PMID 16483647. doi:10.1016/j.biomaterials.2006.01 ...
Implantation of loop recorders (implanted ECG recorders for long-term monitoring of ECG to allow for diagnosis of an arrhythmia ... Electrophysiology study (EPS) consists in the insertion of pacing and recording electrodes either in the esophagus (intra- ...
TMS is non-invasive, and does not require surgery or electrode implantation. Its use can be divided into diagnostic and ... and the induction of electrical currents in implanted devices such as cardiac pacemakers.[11] ... and inadvertent current induction in implanted devices such as pacemakers or defibrillators.[11] ...
... where the aim is to stimulate areas of the brain with implanted electrodes. All the forms of psychosurgery in use today (or ...
EEG electrodes detect electrical signals produced by neurons to measure brain activity and MEG uses oscillations in the ... Currently, the FDA classifies medical implants and devices into three categories, depending on MR-compatibility: MR-safe (safe ... A concern in the use of fMRI is its use in individuals with medical implants or devices and metallic items in the body. The ...
The electrodes are placed in contact with the outer wall of the ventricle (epicardium) to maintain satisfactory cardiac output ... "European Multicenter Prospective Follow-Up Study of 1,002 Implants of a Single Lead VDD Pacing System". Pacing Clin ... Weirich W, Gott V, Lillehei C (1957). "The treatment of complete heart block by the combined use of a myocardial electrode and ... Parsonnet V, Zucker IR, Maxim Asa M (1962). "An intracardiac bipolar electrode for interim treatment of complete heart block". ...
The electrodes for deep brain stimulation are usually placed in the "tremor center" of the brain, the ventral intermediate ... persons who have non-MRI compatible implanted metallic devices, allergy to MR contrast agents, cerebrovascular disease, ...
In these cases, neurosurgeons typically implant strips and grids of electrodes (or penetrating depth electrodes) under the dura ... Each electrode is connected to one input of a differential amplifier (one amplifier per pair of electrodes); a common system ... 4: Common reference electrode's artifact caused by bad contact between reference electrode and skin. Huge wave similar in all ... When the wave of ions reaches the electrodes on the scalp, they can push or pull electrons on the metal in the electrodes. ...
... is very important in electronics for conductors and electrodes on account of its high electrical conductivity even when ... rats implanted with silver foil or injected with colloidal silver have been observed to develop localised tumours. Parenterally ... Powdered silver and its alloys are used in paste preparations for conductor layers and electrodes, ceramic capacitors, and ...
In humans, electrodes can be implanted only in patients who need surgery as treatment, but evidence suggests a similar ... Researchers have checked the BOLD signal against both signals from implanted electrodes (mostly in monkeys) and signals of ... Implanted medical devices such as pacemakers could malfunction because of these currents. The radio-frequency field of the ... but not as good a resolution as invasive procedures such as single-unit electrodes. While typical resolutions are in the ...
Jose Delgado invented the first electrode that was implanted in an animal's brain, using it to make it run and change direction ... This is used in functional neurosurgery where electrodes are implanted or gene therapy is instituted with a high level of ... History of electrodes in the brain: In 1878 Richard Canton discovered that electrical signals transmitted through an animal's ... Generally once a disc is removed it is replaced by an implant which will create a bony fusion between vertebral bodies above ...
"Electrode lights the way to artificial photosynthesis". NewScientist. Reed Business Information Ltd. Retrieved 10 January 2012. ... This type of cell still depends on a semiconductor (such as TiO2) for current conduction on one electrode, but with a coating ... One of these involve the use of a gold electrode to which photosystem II is linked; an electric current is detected upon ... A heterogeneous system has two separate electrodes, an anode and a cathode, making possible the separation of oxygen and ...
By 1952, he had co-authored his first paper on implanting electrodes into humans.[2] ... and implanted electrodes in about 25 of them. Most of these patients were either schizophrenics or epileptics. To determine the ... Rodríguez Delgado had implanted a stimoceiver in the caudate nucleus of a fighting bull. He could stop the animal mid-way that ... A human whose implants were stimulated to produce a reaction were unable to resist the reaction and so one patient said "I ...
... activity in the brain was mainly established in experiments performed on awake kittens with multiple electrodes implanted in ... Multiple electrode and correlation analyses in the cat". Biol Cybern. 60 (2): 121-130. doi:10.1007/BF00202899. PMID 3228555.. ... a non-invasive BCI interface can be created by placing electrodes on the scalp and then measuring the weak electric signals. ... activity of the brain of rabbits and dogs that included rhythmic oscillations altered by light detected with electrodes ...
Electroencephalographic effects of 450191-S and its metabolites in rabbits with chronic electrode implants]". Nippon Yakurigaku ...
In this paradigm, in which the animal is trained to spin a wheel to receive a current through electrodes implanted in its own ...
One area where projectional radiographs are used extensively is in evaluating how an orthopedic implant, such as a knee, hip or ... From his technical publications, it is indicated that he invented and developed a special single-electrode X-ray tube: Morton, ... This technique purportedly negates projection errors associated with evaluating implant position from plain radiographs.[94][95 ... Accuracy assessment of 2D X-ray to 3D CT registration for measuring 3D postoperative implant position (PDF), Materialise. ...
... or may be bioactive with a more interactive functionality such as hydroxylapatite coated hip implants. Biomaterials are also ... Glass electrode. *Glass fiber reinforced concrete. *Glass ionomer cement. *Glass microspheres. *Glass-reinforced plastic ... plastic which is used extensively as the glide rails for industrial equipment and the low-friction socket in implanted hip ...
With this implant in place, over a three-month period, he conducted a number of experiments, including the first direct ... In 2002 he went on to have an array of 100 electrodes fired into the median nerve of his left arm during a two-hour ... 7. "CNN story: Is human chip implant wave of the future?". 1999-01-13. Warwick, K, Gasson, M, Hutt, B, Goodhew, I, Kyberd, P, ... In 1998 a British scientist, Kevin Warwick, became the first human being to test an RFID as an implant to control surrounding ...
Examples include surface electrodes that detect electrical activity on the skin, needle electrodes implanted in muscle, or ... In 2002, an implant was interfaced directly into Warwick's nervous system. The electrode array, which contained around a ... implanted electrodes into an amputee's arm, which gave the patient sensory feedback and allowed for real time control of the ... "Prosthetic implants - Prosthetic limbs and body parts - Plastic surgery - Services A-Z - Services". www.royalfree.nhs.uk. ...
Stretta procedure, uses electrodes to apply radio-frequency energy to the LES. A 2015 systematic review and meta-analysis in ... and fixates the plication with a suture-based implant. The company ceased operations in mid-2008, and the device is no longer ...
The cathode electrode is divided in two insulated halves, thus information of particle entrance position is derived from ... fracture fixation devices and dental implants, are important to human lives and improvement of the life quality of patients.[61 ... is carried out using an electrode system through a hole in a positively biased plasma chamber.[23] Once the ions have been ... mechanical and chemical properties as well as biological activities of artificial implants and biomedical devices. ERDA can be ...
The jet is accelerated towards the counter electrode. During this transport phase, the jet is subjected to strong electrically ... For a broad range of applications including catalysis, tissue engineering, and surface modification of implants this infinite ... light weight composite bone implants. The results suggest that mechanical reinforcement is dependent on the nanostructure ... the solid nanofibre is deposited on the counter electrode. ...
Research reported in 2013 revealed that it is possible to artificially stimulate prior memories and artificially implant false ... excited a single trigger hair with a constant mechanical stimulus using Ag/AgCl electrodes.[100] The trap closed after only a ... "Scientists can implant false memories into mice". BBC News. Retrieved July 26, 2013 ...
Scala Tympani Electrode Arrays. [43]. UCSF. NINDS. -. - 1977-1980. Development Of An Acoustic Prosthesis. [44]. UCSF. NINDS. - ... He led the cochlear implant team at UCSF,[3][9] which transferred its technology to Advanced Bionics,[10] and their version is ... Develop Electrodes For Auditory Prosthesis. [45]. UCSF. NINDS. -. - 1975-1980. Functional Organization Of The Auditory System. ... Develop Multichannel Electrodes For Auditory Prosthesis. [47]. UCSF. NINDS. -. - 1972-1974. Studies On Organization Of Central ...
An elastomeric film is coated on both sides with electrodes. The electrodes are connected to a circuit. By applying a voltage U ... surface-implanted layers of metallic nanoclusters and corrugated or patterned metal films.[4][5] ... arising from the Coulomb forces acts between the electrodes. The electrodes squeeze the elastomer film. The equivalent ... Materials used in research include graphite powder, silicone oil / graphite mixtures, gold electrodes. The electrode should be ...
"Implant gives rats sixth sense for infrared light". Wired UK. 14 February 2013. Retrieved 14 February 2013.. ... 2013: On 14 February, researchers developed a neural implant that gives rats the ability to sense infrared light, which for the ... pH glass electrode. *Potentiometric sensor. *Redox electrode. *آشکارساز دود. *Zinc oxide nanorod sensor ...
A chronic electrode implant is an electronic device implanted chronically (for a long period) into the brain or other ... Implantable electrode research also employs many different techniques for surgically implanting the electrodes; the most ... Another recent study addressing the impact of chronically implanted electrodes points that tungsten-coated electrodes seem to ... Recording electrodes, however, must rely on whatever signals are present where they are implanted, and cannot easily be made ...
... comprising an elongate electrode carrier member (11), a bioresorbable stiffening element (15) and an outer layer (16) ... is made of a resiliently flexible first material and has a plurality of electrodes (12) mounted thereon and has a first ... Curved cochlear implant electrode array. US20040122501. Sep 28, 2001. Jun 24, 2004. Fysh Dadd. Cochlear implant electrode array ... Cochlea implant. US5645585 *. Mar 15, 1996. Jul 8, 1997. Cochlear Ltd.. Cochlear electrode implant assembly with positioning ...
IEEE Xplore, delivering full text access to the worlds highest quality technical literature in engineering and technology. | IEEE Xplore
Implanted electrodes and RFs. A, Two implanted 6 × 8 microelectrode arrays in V1 of the right hemisphere of Monkey 2. A, ... Adult Cortical Plasticity Studied with Chronically Implanted Electrode Arrays. Hiroshi Abe, Justin N.J. McManus, Nirmala ... Adult Cortical Plasticity Studied with Chronically Implanted Electrode Arrays. Hiroshi Abe, Justin N.J. McManus, Nirmala ... Using chronically implanted electrode arrays, we were able to provide a quantitative and longitudinal measure of the functional ...
... A. Stratmann,1 P. Mittmann,1 G. Rademacher,2 G. Grupe,1 S. ... S. H. Bartling, R. Gupta, A. Torkos et al., "Flat-panel volume computed tomography for cochlear implant electrode array ... T. Struffert, V. Hertel, Y. Kyriakou et al., "Imaging of cochlear implant electrode array with flat-detector CT and ... "Role of electrode placement as a contributor to variability in cochlear implant outcomes," Otology & Neurotology, vol. 29, no. ...
... has developed an electrode implant that may drastically improve how amputees control and feel ... New Electrode Implants Wrap Around Nerves. September 22nd, 2016 Editors Neurology, Neurosurgery, Rehab ... Draper, an engineering company based in Cambridge, MA, has developed an electrode implant that may drastically improve how ... Unlike other electrode arrays, Drapers device is designed to have the electrodes wrap around the nerves and not simply be ...
Because the system is implanted, electrodes do not need to be placed on the skin and because individual muscles are activated, ... It is also less invasive than previous generations of neural implants and because the electrodes are so small they can be ... They are implanted next to a nerve or adjacent to a muscle at the motor point near to where the nerve attaches. Once implanted ... First bionic electrode implanted into stroke patients arm. Published: 12 May 2005 ...
... : Lewis, S.; Gundeman, H.; Russold, M.; Westendorff, S.; Gail, A.; Dörge, T.; Hoffmann, ...
Foreign Body Response to Silicone in Cochlear Implant Electrodes in the Human.. OMalley JT1, Burgess BJ, Galler D, Nadol JB Jr ... Control Nucleus 24 electrode array not previously implanted. The silicone carrier showed no circular defects, as were shown in ... Silicone as part of a cochlear implant electrode may be responsible for a foreign body response in the human. ... Foreign body response to silicone in cochlear implant electrodes in the human ...
B. Chen, H. N. Kha, and G. M. Clark, "Development of a steerable cochlear implant electrode array," in 3rd Kuala Lumpur ... Individual Optimization of the Insertion of a Preformed Cochlear Implant Electrode Array. Thomas S. Rau, Thomas Lenarz, and ... E. Von Wallenberg and R. Briggs, "Cochlears unique electrode portfolio now and in the future," Cochlear Implants International ... O. Majdani, D. Schurzig, A. Hussong et al., "Force measurement of insertion of cochlear implant electrode arrays in vitro: ...
Quantitative analysis of the tissue response to chronically implanted microwire electrodes in rat cortex.. Winslow BD1, Tresco ... Several hypotheses have been proposed to explain how the brain tissue reaction to single unit recording electrodes influences ... we did find evidence of persistent inflammation and enhanced BBB permeability at the electrode brain tissue interface that ...
One embodiment of the defibrillator electrodes includes a flexible conductive mesh and non-conduc ... Improved implantable defibrillator electrodes and methods of implanting such electrodes are disclosed. ... Methods for implanting the defibrillator electrodes include rolling an electrode and inserting the rolled electrode into a ... securing the defibrillator electrode to the pericardium.. 2. A method of surgically implanting a defibrillator electrode within ...
Equipped with roving electrodes, these implants seek out and restore neural connections between in the brain and the rest of ... National Primate Research Centre have found a way to restore movement to paralysed monkeys through the use of brain implants. ... Equipped with roving electrodes, these implants seek out and restore neural connections between in the brain and the rest of ... The electrodes are able to detect where the strongest movement signal is coming from, and attach itself to that area of the ...
Electrical stimulation with non-implanted electrodes for urinary incontinence in men. Some men leak urine (urinary incontinence ... Berghmans B, Hendriks E, Bernards A, de Bie R, Omar M. Electrical stimulation with non-implanted electrodes for urinary ... with non-implanted devices involves stimulation of these muscles with a painless electric current using surface electrodes on ... The current review focused on electrical stimulation with non-implanted devices for the treatment of urinary incontinence in ...
This paper presents results of a pilot study evaluating the efficacy of robotic assistance using novel steerable electrode ... arrays for cochlear implant surgery. The current surgical setup of cochlear... ... Roland, T.: A model for cochlear implant electrode insertion and force evaluation: results with a new electrode design and ... Ketten, D.R., et al.: In vivo measures of cochlear length and insertion depth of Nucleus cochlear implant electrode arrays. Ann ...
... providing a discreet appearance for cochlear implant users and options for surgeons. ... Cochlears Profile Series is said to be the thinnest cochlear implant, ... FDA Approves Thin Cochlear Implant with Thin Electrode. Jul 2, 2015 , People , ... approval of the companys Cochlear Nucleus Profile Implant with Slim Straight Electrode (CI522). Built on over 30 years of ...
Prototype micromachined thin film electrode array for cochlear implants Author(s): Joanna R. Parker; Yvonne Y. Duan; Jim ... Development of a micromachined electrode array for cochlear implant application is presented. The device is constructed from a ... for Cochlear Implant and Hearing Aid Innovation (Australia). Yvonne Y. Duan, Co-operative Research Ctr. for Cochlear Implant ... for Cochlear Implant and Hearing Aid Innovation (Australia). H. Barry Harrison, Griffith Univ. (Australia). Olaf Reinhold, ...
The electrode is so soft that it deflects against a water surface. In order to implant such electrodes, the researchers have ... Our new technology enables us to implant as flexible electrodes as we want, and retain the exact shape of the electrode within ... Facts about the electrodes: The electrodes are made of 4 mmgold leads and individually insulated with 4 mm parylene. The array ... Until now, developed flexible electrodes have not been able to maintain their shape when implanted, which is why they have been ...
Two Case Western Reserve University researchers are building implants made of diamond and flexible polymer that are designed to ... Unlike standard electrodes, diamonds wont corrode, Martin said. Diamond is so hard and rigid, however, that an entire implant ... Gem of an idea: A flexible diamond-studded electrode implanted for life. ... Currently, medical researchers are using carbon-based needle electrodes to monitor neurotransmitters. But, the electrode is ...
... researchers at Lund University have been working on developing implantable electrodes that can capture signals from single ... The electrode is so soft that it deflects against a water surface. In order to implant such electrodes, the researchers have ... Our new technology enables us to implant as flexible electrodes as we want, and retain the exact shape of the electrode within ... Breakthrough for electrode implants in the brain. by Lund University For nearly nine years, researchers at Lund University have ...
... flexible electrode developed at the University of Michigan is 10 times smaller than the nearest competition and could make long ... A better brain implant: Slim electrode cozies up to single neurons * Nov 11, 2012 ... To demonstrate how well the electrode listens in on real neurons, Kipkes team implanted it into the brains of rats. The ... Because this electrode is so small and unobtrusive, it may be able to stay in the brain for long periods without upsetting the ...
The possible auditory nerve implants likely would be suitable fo...,Radical,Idea,of,Implanting,Tiny,Electrodes,,to,the,,Deaf, ... In nearly every measure these work better than cochlear implant... ... Scientists pursued the idea of implanting tiny electronic hearing devi...Now however scientists have shown in animals that its ... Radical Idea of Implanting Tiny Electrodes to the Deaf. Scientists pursued the idea of implanting tiny electronic hearing devi ...
A medical assembly includes the implanted biological electrode. A contact prepared by the winding of a nanofibre or film ... An implanted biological electrode, including a wire (2), wherein the two ends of the wire (2) are connected with a contact (1) ... material with a relatively high resistivity can effectively suppress turbulence and improve the safety of the electrode during ... Implanted electrode and preparation method thereof and medical assembly comprising implanted electrode ...
... spinal-cord and deep-brain stimulators all deliver therapeutic stimuli through electrodes implanted in the human body. ... Heart, cochlear, spinal-cord and deep-brain stimulators all deliver therapeutic stimuli through electrodes implanted in the ... are working to explain what happens when electrodes degrade in the body and to develop a way to improve the electrode surface ... Implants could be made smaller, longer lasting and more effective if a surfacing technique could be developed that reduces the ...
To demonstrate how well the electrode listens in on real neurons, Kipkes team implanted it into the brains of rats. The ... Because this electrode is so small and unobtrusive, it may be able to stay in the brain for long periods without upsetting the ... A new electrode developed at the University of Michigan can focus on the electrical signals of just one neuron. It may help ... overcoming inflammation larger electrodes cause that damages both the brain and the electrodes. ...
The coating is applied to the implant by physical vapor deposition. The coating preferably is applied via a generally oblique ... The coating may be partially nonporous to protect the implant from corrosion. ... An implantable electrode has a biomedically compatible, microscopically rough, metal coating that creates a high double-layer ... Coated electrode and method of making a coated electrode US5683442A (en) 1997-11-04. Cardiovascular implants of enhanced ...
Objective: To evaluate the preservation of low frequency residual hearing after cochlear implant surgery using an electrode for ... Fifty-six patients with functional deafness who had undergone cochlear implant surgery and received a Flex 28 electrode (MED-EL ... Residual Hearing Outcomes After Cochlear Implant Surgery Using Ultra-flexible 28-mm Electrodes. In: Otology & Neurotology, Vol ... The use of a full insertion electrode of 28mm in patients with poor preoperative thresholds does not allow for usable ...
We used the cochlear implant electrode array for novel "close-field" electroporation to transduce mesenchymal cells lining the ... With BDNF therapy, the regenerated spiral ganglion neurites extended close to the cochlear implant electrodes, with localized ... The focusing of electric fields by particular cochlear implant electrode configurations led to surprisingly efficient gene ... Close-Field Electroporation Gene Delivery Using the Cochlear Implant Electrode Array Enhances the Bionic Ear ...
... Otol Neurotol. ... possibly contribute to the determination of the optimal cochlear implant (CI) electrode position. ...
  • The value of digital volume tomography in assessing the position of cochlear implant arrays in temporal bone specimens," Ear and Hearing , vol. 31, no. 3, pp. 413-419, 2010. (hindawi.com)
  • Unlike other electrode arrays, Draper's device is designed to have the electrodes wrap around the nerves and not simply be placed against them. (medgadget.com)
  • To study the dynamics of the circuitry underlying these changes longitudinally, we implanted microelectrode arrays in macaque ( Macaca mulatta ) V1, eliminating the possibility of sampling bias, which was a concern in previous studies. (jneurosci.org)
  • Force measurement of insertion of cochlear implant electrode arrays in vitro:comparison of surgeon to automated insertion tool," Acta Oto-Laryngologica , vol. 130, no. 1, pp. 31-36, 2010. (hindawi.com)
  • This paper presents results of a pilot study evaluating the efficacy of robotic assistance using novel steerable electrode arrays for cochlear implant surgery. (springer.com)
  • Martin and Zorman also build electrodes with arrays of eight or more electrically-connected diamond segments. (nanowerk.com)
  • The results strongly suggest that creating feasible electrode arrays at these small dimensions is a viable path forward for making longer-lasting devices," he said. (umich.edu)
  • Like the new device, cochlear implants are small electrode arrays that receive signals from an external sound processor. (bio-medicine.org)
  • To describe extracochlear extension of revision cochlear implant arrays into the Fallopian canal. (ovid.com)
  • Two adult patients with extension of revision cochlear implant arrays into the Fallopian canal. (ovid.com)
  • Our cases illustrate the potential association of long-standing electrodes with otic capsule changes, allowing extracochlear malposition of subsequent arrays. (ovid.com)
  • Multielectrode arrays (MEAs) of planar SIROF electrodes having diameters of 50-400 microns, were fabricated on thin polyimide substrates. (arvojournals.org)
  • Today's electrode arrays all provide more than enough channels for excellent speech recognition. (cochlearimplanthelp.com)
  • The MED-EL FLEX arrays have single electrodes rather than pairs of electrodes near the tip, to minimize the diameter of the array in the narrowest part of the cochlea. (cochlearimplanthelp.com)
  • Combining subretinal high-pixel-density arrays with optically powered serial photovoltaic sensors may alleviate some of the difficulties associated with today's devices, which rely on implanted arrays and inductive coils. (nature.com)
  • MED-EL has 20 years of experience in the field of hearing preservation which has enabled us to engineer the softest and most flexible electrode arrays available. (medel.com)
  • The secret behind our soft and flexible electrode arrays lies within the custom made wires that transport the electrical signals inside cochlea. (medel.com)
  • Other manufacturers use straight wires in their electrode arrays. (medel.com)
  • Thresholds and maximum comfortable loudness levels were measured in postlingually deaf adults using all available sites in their electrode arrays. (biomedsearch.com)
  • The carrier member ( 11 ) is made of a resiliently flexible first material and has a plurality of electrodes ( 12 ) mounted thereon and has a first configuration selected to allow it to be inserted into an implantee's cochlea, and at least a second configuration wherein it is curved to match a surface of the cochlea. (google.com)
  • In an effort to reduce trauma to the structure of the cochlea, the kinematics and path planning for novel cochlear steerable electrodes are developed to minimize the interaction forces between the electrode and the cochlea. (springer.com)
  • If the idea pans out in further animal and human studies, profoundly and severely deaf people would have another option that could allow them to hear low-pitched sounds common in speech, converse in a noisy room, identify high and low voices, and appreciate music areas where cochlea implants, though a boon, have significant limitations. (bio-medicine.org)
  • Postoperative CTs of each patient showed exit of the electrode from the cochlea into the tympanic or labyrinthine Fallopian canal. (ovid.com)
  • Localization of the electrode after cochlear implantation seems to have an impact on auditory outcome, and conebeam CT has emerged as a reliable method for visualizing the electrode array position within the cochlea. (ajnr.org)
  • After surgery, the final placement of the electrode array within the cochlea can be documented with conebeam CT (CBCT). (ajnr.org)
  • But CT scans with 3D reconstruction of inner ear provide more accurate image of the spacial relationship of the electrode in the cochlear canal with direct demonstration of electrode insertion depth in the cochlea. (elsevier.com)
  • Given the impedance changes were dominated by the polarization component, these findings suggest that the electrical stimulation altered the electrode surface rather than the bulk tissue and fluid in the cochlea. (ox.ac.uk)
  • Under software control, the 16 independent current sources of the AB implant can steer stimulation to 120 separate locations along the cochlea, thereby increasing the amount of frequency information that can be delivered 2 . (advancedbionics.com)
  • Cochlear provides a broad range of implants and electrodes to address your type of hearing loss, cochlea anatomy and surgeon preference. (cochlear.com)
  • Our broad range of implants and electrodes allow your surgeon to choose the best one for you or your child's type of hearing loss, cochlea anatomy and the surgeon's preference. (cochlear.com)
  • The anatomy of the cochlea can vary from person to person which is why we offer a range of electrode shapes and lengths. (cochlear.com)
  • MED-EL electrodes have been specifically engineered to protect the neural structures of the cochlea. (medel.com)
  • MED-EL has developed a wave-shaped wire design that enables the electrode to flex and bend making it perfectly suitable for insertion into the cochlea. (medel.com)
  • It sends the signals to electrodes in your inner ear, or cochlea. (asha.org)
  • Cochlear implants bypass damaged parts of the cochlea to stimulate the auditory nerve directly. (kidshealth.org)
  • It sends electrical impulses by a thin wire to electrodes placed in the cochlea. (kidshealth.org)
  • That's because a limited number of electrodes take over the work of the thousands of hair cells in a normal cochlea. (kidshealth.org)
  • Threads the wires with the electrodes into the spirals of the cochlea. (kidshealth.org)
  • Cochlear implants channel sound to bypass damaged parts of the cochlea. (consumeraffairs.com)
  • In acoustic implants such as BAHAs and middle ear implants, the receiver is fused to the bone or cochlea to receive sound waves. (consumeraffairs.com)
  • Applications for stimulating interfaces include sensory prosthetics (cochlear implants, for example, are the most successful variety of sensory prosthetics) and deep brain stimulation therapies, while recording interfaces can be used for research applications[11] and to record the activity of speech or motor centers directly from the brain. (wikipedia.org)
  • Once implanted, the microstimulators receive power and stimulation commands via a link from a radio frequency coil fitted to the arm, which is in turn connected to a control unit. (southampton.ac.uk)
  • By switching off the microstimulators implanted in the finger and thumb, she will be able to use her own remaining control of finger and thumb flexion to grasp an object, while continuing stimulation to the wrist extensors will maintain a functional hand position for grasping. (southampton.ac.uk)
  • However, until now electronic stimulation devices have not been well accepted, mainly because with surface systems people have difficulty putting the electrodes in the correct place to achieve a useful movement and implanted systems have involved major surgery. (southampton.ac.uk)
  • Electrical stimulation with non-implanted devices involves stimulation of these muscles with a painless electric current using surface electrodes on the skin or a probe placed into the anus. (cochrane.org)
  • Electrical stimulation with non-implanted devices is used for patients with different types of urinary incontinence and symptoms of urgency, frequency and nocturia. (cochrane.org)
  • The current review focused on electrical stimulation with non-implanted devices for the treatment of urinary incontinence in men. (cochrane.org)
  • To determine the effectiveness of electrical stimulation with non-implanted devices for men with stress, urgency or mixed urinary incontinence in comparison with no treatment, placebo treatment, or any other 'single' treatment. (cochrane.org)
  • Additionally, the effectiveness of electrical stimulation with non-implanted devices in combination with another intervention was compared with the other intervention alone. (cochrane.org)
  • Finally, the effectiveness of one method of electrical stimulation with non-implanted devices was compared with another method. (cochrane.org)
  • A high capacitance for an effector electrode desirably reduces the polarization rise associated with stimulation pulses. (google.com)
  • Objective: To evaluate the preservation of low frequency residual hearing after cochlear implant surgery using an electrode for atraumatic implantation and complete cochlear stimulation. (uni-muenchen.de)
  • One patient with presumed postviral hearing loss presented with declining function and increasing facial stimulation from an implant placed 30 years previous. (ovid.com)
  • Both patients were reimplanted with minimal insertion resistance via the established electrode tract, yet demonstrated facial nerve stimulation during intraoperative telemetry and on device activation. (ovid.com)
  • Electrical brain stimulation also raised quantities of L-dopa in the brain, which explains why implanting DBS electrodes helps patients cut down on their L-dopa medications. (sciencenordic.com)
  • The beauty of this approach is that it is based on use of the standard cochlear implant electrode array inserted into the inner ear that delivers sound sensations to the brain via the electrical stimulation of hearing nerve cells," says Cowan. (sciencemeetsbusiness.com.au)
  • A vagus nerve implant with two electrodes - one to apply desired stimulation going down into the body, the other to block unwanted stimulation going up to the brain. (gatech.edu)
  • We've arranged the two near each other, so the blocking electrode forces the stimulation from the stimulating electrode to only go in one direction. (gatech.edu)
  • OBJECTIVES: Electrode impedance increases following implantation and undergoes transitory reduction with onset of electrical stimulation. (ox.ac.uk)
  • RESULTS: Both the experimental and clinical data exhibited a reduction in electrode impedance, 20 and 5% respectively, within 15-30 minutes of stimulation onset. (ox.ac.uk)
  • Cochlear's electrodes are intended to be placed where hearing nerve stimulation is most effective. (cochlear.com)
  • Chronic subcortical electrode implant in a laboratory rat used to deliver electrical stimulation to the brain. (wikipedia.org)
  • One current therapeutic use of implanted electronics is called deep brain stimulation, which is FDA-approved and used to treat Parkinson's disease. (technologyreview.com)
  • Implants for deep brain stimulation often must be repositioned or have their settings adjusted, and usually don't last for more than a few years. (technologyreview.com)
  • Unlike vagus nerve stimulation or deep brain stimulation, rTMS does not require surgery or implantation of electrodes. (mayoclinic.org)
  • As mentioned above, if there is to be significant progress towards long-term implantable electrodes, an important step is documenting the response of living tissue to electrode implantation in both the acute and chronic timelines. (wikipedia.org)
  • One serious impediment to understanding the tissue response is the lack of true standardization of implantation technique or of electrode materials. (wikipedia.org)
  • Word recognition following implantation of conventional and 10-mm hybrid electrodes," Audiology and Neurotology , vol. 14, no. 3, pp. 181-189, 2009. (hindawi.com)
  • Validation of minimally invasive, image-guided cochlear implantation using Advanced Bionics, Cochlear, and Medel electrodes in a cadaver model," International Journal of Computer Assisted Radiology and Surgery , vol. 8, no. 6, pp. 989-995, 2013. (hindawi.com)
  • The electrode and the implantation technology that we have now developed have these properties, which is unique", says Professor Jens Schouenborg who together with Dr Lina Pettersson led the project. (healthcanal.com)
  • The array of electrodes consists of eight flexible channels, designed to follow the movement of the brain.Both the electrode and implantation technology, which have been tested on rats, are patented by NRC researchers, in Europe and the US, among other places. (healthcanal.com)
  • Both the electrode and implantation technology, which have been tested on rats, are patented by NRC researchers, in Europe and the US, among other places. (medicalxpress.com)
  • In the electrode implantation in the human body is uncertain, the electrode itself is required to satisfy the safety requirements under resonance conditions. (google.com)
  • SIROF electrodes delivered stimulus charge densities above reported human perceptual thresholds over a 100 day implantation period. (arvojournals.org)
  • A new study has shown that cochlear implant electrodes improve hearing in patients and reduce inflammation caused by implantation. (sciencemeetsbusiness.com.au)
  • HEARing Cooperative Research Centre (HEARing CRC) CEO Professor Robert Cowan said research using a cochlear implant electrode array that slowly releases anti-inflammatory drugs into the cochlear following implantation could lead to new benefits for cochlear implant users. (sciencemeetsbusiness.com.au)
  • The cochlear implant electrode array used in the research study was modified to slowly release a cortico-steroid after implantation. (sciencemeetsbusiness.com.au)
  • The electrode and the implantation technology that we have now developed have these properties, which is unique. (neuronewsinternational.com)
  • To explore the immediate and 1-year outcomes of patients who underwent implantation with the slim modiolar electrode (SME). (bvsalud.org)
  • Devices and methods of use for introduction and implantation of an electrode as part of a minimally invasive technique. (patentsencyclopedia.com)
  • The electrode is configured for implantation on an outer surface of a blood vessel and the control system is programmed to deliver a baroreflex therapy via the monopolar electrode to a baroreceptor within a wall of the blood vessel. (patentsencyclopedia.com)
  • Bionic Vision Australia researchers announced on August 30, 2012 that they successfully performed the first implantation of an early prototype bionic eye with 24 electrodes. (implantable-device.com)
  • Electrochemical impedance spectroscopy (EIS) is used to study the properties of the electrode, and to identify potential problems caused by the micromachining process and materials. (spie.org)
  • Implants could be made smaller, longer lasting and more effective if a surfacing technique could be developed that reduces the electrode impedance and also avoids activating the body's natural defences so that impedance stays low. (waikato.ac.nz)
  • Professor Scott and Mark Jones have developed an objective method of characterising electrode impedance through the use of a newly-developed fractional capacitor model of the electrode-electrolyte interface. (waikato.ac.nz)
  • Applying this should help the team to understand exactly how the electrode impedance is affected by various biological events. (waikato.ac.nz)
  • And a high capacitance for a sensor electrode will desirably lower the source impedance and reduce the signal attenuation in the amplifier of the generator. (google.com)
  • An expected increase in electrode impedance was observed over the course of the study due to tissue response, increasing by a factor of 1.86±0.65 (n=12, averaged over all electrode diameters), and ranging from 4-10 kohm and 28-63 kohm for 400-micron and 50-micron diameter electrodes, respectively. (arvojournals.org)
  • Cyclic voltammetry and transient measurements at sacrifice suggest that the impedance increase is due to tissue and not changes in the SIROF electrode coatings. (arvojournals.org)
  • Methods for Forming an Electrode Device with Reduced Impedance - Improved low-cost, highly reliable methods for increasing the electrochemical surface area of neural electrodes are described. (patentsencyclopedia.com)
  • The suppression of the inflammatory reaction in the cochlear following electrode insertion is likely responsible for these lower impedance levels and may potentially contribute to preservation of an implant user's residual hearing abilities when combined with slimmer electrode designs and newer surgical techniques," Cowan explains. (sciencemeetsbusiness.com.au)
  • Impedance changes in chronically implanted and stimulated cochlear implant electrodes. (ox.ac.uk)
  • DESIGN: Impedance measures recorded in (a) four cats following 6 months of cochlear implant use, and (b) three cochlear implant recipients with 1.5-5 years cochlear implant experience. (ox.ac.uk)
  • Increases in impedance have been related to technical defects of the electrode as well as inflammatory and/or fibrosis along the electrode. (uni-hannover.de)
  • A clinical protocol for an experimental study to evaluate the speech perception and production, and communication skills using the multiple electrode cochlear implant in pre-adolescent children has been developed. (edu.au)
  • Psychophysical studies using a multiple-electrode cochlear implant in patients who were deafened early in life. (edu.au)
  • To quantify the prevalence, extent, and time course of cortical reorganization, we used chronically implanted microarray electrodes for an unbiased approach to examine the LPZ and surrounding cortical topography. (jneurosci.org)
  • Quantitative analysis of the tissue response to chronically implanted microwire electrodes in rat cortex. (nih.gov)
  • Methods for implanting the defibrillator electrodes include rolling an electrode and inserting the rolled electrode into a subxiphoid opening while thorascopically observing the insertion and manipulation of the defibrillator electrode. (freepatentsonline.com)
  • A cochlear implant is a surgically placed device that helps a person with severe hearing loss hear sounds. (kidshealth.org)
  • She surgically implanted electrodes on the outermost layer of the cord and stimulated right below threshold level. (scientificamerican.com)
  • To demonstrate how well the electrode listens in on real neurons, Kipke's team implanted it into the brains of rats. (umich.edu)
  • Electrodes were implanted in their brains along with two tiny catheters to use for a minimally invasive technique, microdialysis, which takes continuous measurements of fluid contents inside the body. (sciencenordic.com)
  • A group of 15 patients suffering from either epileptic seizures or brain tumors volunteered to allow scientists to insert electrodes into their brains . (slashdot.org)
  • Several studies have examined the remote control of rats using micro-electodes implanted into their brains and rely on stimulating the reward centre of the rat. (wikipedia.org)
  • Eric Leuthardt believes that in the near future we will allow doctors to insert electrodes into our brains so we can communicate directly with computers and each other. (technologyreview.com)
  • In an announcement on 28 August, Neuralink unveiled prototypes of its device and showed off pigs that had had the devices implanted in their brains. (newscientist.com)
  • and Timothy Gardner, a professor at Boston University who is known for implanting tiny electrodes in the brains of finches to study how the birds sing. (officechai.com)
  • MRI without magnet removal in neurofibromatosis type 2 patients with cochlear and auditory brainstem implants," Otology & Neurotology , vol. 35, no. 5, pp. 821-825, 2014. (hindawi.com)
  • The possible auditory nerve implants likely would be suitable fo. (bio-medicine.org)
  • An alternative that promised superior results was implanting a device directly in the auditory nerve. (bio-medicine.org)
  • Now, however, scientists have shown in animals that its possible to implant a tiny, ultra-thin electrode array in the auditory nerve that can successfully transmit a wide range of sounds to the brain. (bio-medicine.org)
  • He led a study requested by the National Institutes of Health to re-evaluate the potential of auditory nerve implants. (bio-medicine.org)
  • The possible auditory nerve implants likely would be suitable for the same people who are candidates today for cochlear implants: the profoundly deaf, who cant hear at all, and the severely deaf, whose hearing ability is greatly reduced. (bio-medicine.org)
  • Middlebrooks says its possible that the low power requirements of the auditory nerve implants might lead to development of totally implantable devices. (bio-medicine.org)
  • If the initial success in animals is borne out in further tests, a human auditory nerve implant is probably five to 10 years away, he says. (bio-medicine.org)
  • They measured brain processing of auditory signals in normal conditions, then compared deaf animals brain responses to sounds using cochlear implants and then the direct auditory nerve implants. (bio-medicine.org)
  • The aim of this retrospective study was to evaluate the frequency and clinical impact of scalar dislocation of various electrodes and surgical approaches and to evaluate its influence on auditory outcome. (ajnr.org)
  • In the first instance, volume rendering provides information about the three-dimensional configuration of an electrode array implanted into the auditory nerve of a feline. (utah.edu)
  • Non-invasive imaging is required to assess the correct location of the electrode array within the auditory nerve and in relation to the modiolus. (utah.edu)
  • After neurosurgeons cut a hole in their skulls, the research team placed 256 electrodes over the part of the brain that processes auditory signals called the temporal lobe. (slashdot.org)
  • Journal Club: Auditory Brainstem Implant Sees Resurgence in. (lww.com)
  • Dr. Lee is director of the Wilson Auditory Brainstem Implant Program at the Massachusetts Eye and Ear Infirmary and associate professor in the Department of Otology and Laryngology at Harvard Medical School. (lww.com)
  • Cochlear implants (CIs), which bypass the nonfunctioning hair cells of the inner ear to directly stimulate the auditory nerve, are reserved for children with severe to profound hearing loss in both ears. (lww.com)
  • Then in 2000, the United States Food and Drug Administration (FDA) approved the auditory brainstem implant for patients 12 years of age or older with neurofibromatosis type 2 (NF2). (lww.com)
  • Unlike a cochlear implant, an ABI does not require an intact auditory nerve and can be placed after tumor removal to provide sound sensations to the deafened patient (Prog Brain Res 2009;175:333-345 ). (lww.com)
  • The electrodes trigger the auditory nerve. (asha.org)
  • The electrodes stimulate the auditory nerve. (kidshealth.org)
  • Children with cochlear implants begin auditory rehabilitation (listening therapy) and speech and language therapy soon after surgery. (kidshealth.org)
  • Cochlear implants and auditory brain stem implants use a small wire called an electrode array to transmit electronic impulses and stimulate the auditory nerve or brain stem. (consumeraffairs.com)
  • The research is based on the AMF RF microstimulators that are implanted into a patient's arm and act like 'bionic neurons' mimicking the messages from the brain to hopefully recreate useful function in paralysed or weak arms. (southampton.ac.uk)
  • Several hypotheses have been proposed to explain how the brain tissue reaction to single unit recording electrodes influences biocompatibility including progressive changes in the spatial distribution of reactive astrocytes, and the loss of neurons over the indwelling period. (nih.gov)
  • The Lund researchers' tailored electrodes, which they call 3-D electrodes, are unique in that they are extremely soft and flexible in all three dimensions, in a way that enables stable recordings from the neurons over a long time. (healthcanal.com)
  • For nearly nine years, researchers at Lund University have been working on developing implantable electrodes that can capture signals from single neurons in the brain over a long period of time - without causing brain tissue damage. (medicalxpress.com)
  • The main problem that neurons have with electrodes is that they make terrible neighbors. (umich.edu)
  • The rat's neurons and immune system got used to the electrodes, suggesting that the electronic invaders might be able to stay for the long term. (umich.edu)
  • The electrode records the electronic pulses sent by 41 neurons that surround it in an area of the brain that generates the movements of the tongue and mouth when speech is being generated. (medindia.net)
  • Engineers from the University of Michigan at Ann Arbor have developed a new electrode coating that promises a better and longer quality connection to neurons in the brain. (medgadget.com)
  • The PEDOT in the coating enables the electrodes to operate with less electrical resistance than current models, which means they can communicate more clearly with individual neurons. (medgadget.com)
  • Musk showed a video of neurons responding to the electrodes. (newscientist.com)
  • The Neuralink team trotted out three pigs to demonstrate the device: the first, named Joyce, had no implant, and the second, named Gertrude, had an implant that monitored neurons in her snout. (newscientist.com)
  • E. Von Wallenberg and R. Briggs, "Cochlear's unique electrode portfolio now and in the future," Cochlear Implants International , vol. 15, no. 1, pp. (hindawi.com)
  • According to Cochlear Limited, the Nucleus Profile with Slim Straight Electrode is the newest in Cochlear's portfolio of electrodes designed for preservation of delicate cochlear structures. (hearingreview.com)
  • Advanced Bionics' 16 channels and Cochlear's 22 channels each drive one electrode. (cochlearimplanthelp.com)
  • Cochlear's implant has 22 electrodes, with one current source (or pair of sources, if counted separately) shared among all of the electrodes. (cochlearimplanthelp.com)
  • Relationship between intracochlear electrode position and tinnitus in cochlear implantees," Acta Oto-Laryngologica , vol. 135, no. 8, pp. 781-785, 2015. (hindawi.com)
  • A temporal bone study of insertion trauma and intracochlear position of cochlear implant electrodes I: comparison of Nucleus banded and Nucleus Contour electrodes. (springer.com)
  • The intracochlear dislocation rate of various straight electrodes detected by conebeam CT images is relatively low. (ajnr.org)
  • According to Aschendorff et al, 1 the intracochlear localization of the electrode has a significant impact on speech recognition. (ajnr.org)
  • During the pre-operative stage the subject's current hearing aids or tactile device are used, and for the post-operative stage the Nucleus multiple electrode intracochlear implant. (edu.au)
  • The current surgical setup of cochlear implant surgery is briefly reviewed and its limitations are highlighted. (springer.com)
  • This approval further expands what is already the industry's largest cochlear implant portfolio and supports a wider range of surgical techniques among implanting surgeons, giving them and their patients the greatest possible choice. (hearingreview.com)
  • The Utah Electrode Array has been implanted into the cochlear nerve of felines, to develop the delicate surgical technique required, and to test the stability of the implant for long periods of time. (utah.edu)
  • The HiFocus SlimJ or HiFocus Mid-Scala electrode provide the surgeon with maximum surgical flexibility based upon surgical preference while maintaining patient performance. (advancedbionics.com)
  • The HiRes™ Ultra cochlear implant was developed in collaboration with leading cochlear implant surgeons to meet the surgical need and those of the recipient. (advancedbionics.com)
  • Yoana Nuevo-Ordóñez and colleagues of the Sanz-Medel research group from the University of Oviedo in Spain have developed a highly sensitive method to determine the levels of titanium in human blood, establishing a baseline for natural levels of titanium in untreated individuals as well as measuring levels in patients with surgical implants. (phys.org)
  • A surgical implant adapted to treat a prolapse in a patient is provided. (google.ca)
  • Methods of using a surgical implant are also provided. (google.ca)
  • Adhesion barriers refer to medical implants that help reduce adhesion and scarring between organs and tissues after a surgical procedure. (prnewswire.co.uk)
  • For a cochlear implant, "the surgical process takes about one to two hours," Dr. Briggs says. (consumeraffairs.com)
  • The implants that have been the norm need a significant amount of surgical expertise to connect to the human brain and can be both costly and highly dangerous. (engadget.com)
  • Dr Penny Allen, a specialist surgeon at the Centre for Eye Research Australia, led a surgical team to implant the prototype at the Royal Victorian Eye and Ear Hospital. (implantable-device.com)
  • Hearing preservation outcomes with different cochlear implant electrodes: nucleus hybrid L24 and nucleus freedom CI422," Audiology and Neurotology , vol. 19, no. 5, pp. 293-309, 2014. (hindawi.com)
  • Cochlear Limited , Centennial, Colo, has announced the US Food and Drug Administration (FDA) approval of the company's Cochlear Nucleus Profile Implant with Slim Straight Electrode (CI522). (hearingreview.com)
  • The Nucleus Profile Implant is built on the same reliability principles that are standard for all of our current and previous generation devices," said Anthony Manna, president, Cochlear North America. (hearingreview.com)
  • The company reports that people who choose the Nucleus Profile with Slim Straight Electrode will also receive the Nucleus 6 Sound Processor, which delivers more smart features than before, including true 2.4 GHz wireless connectivity and SmartSound iQ, a signal processing platform that automatically adapts to different acoustic environments. (hearingreview.com)
  • The wires send pulse current via the electrodes, and that can help in regulating the imbalance that exists currently in Gerod's nucleus accumbens. (mecda.org)
  • Our newest generation Nucleus Implant - the Nucleus Profile™ Plus Implant - expands our innovative implant portfolio by offering access to MRIs at 1.5 and 3.0 Tesla without removing the magnet or requiring a head wrap. (cochlear.com)
  • Founded in 1981, Cochlear Limited is a leading manufacturer of Nucleus® cochlear implants and other hearing solutions, including the Nucleus® Hybrid Implant System and the Baha® bone conduction system. (consumeraffairs.com)
  • Radical Idea of Implanting Tiny Electrodes to the Deaf ( Scientists pursued the idea of implanti. (bio-medicine.org)
  • A positive interpulse bias decreased the polarization of the SIROF electrodes, but was not required to deliver pulses at charge levels above reported chronic perceptual thresholds in humans. (arvojournals.org)
  • A coronary stent - in this case a drug-eluting stent - is another common item implanted in humans. (wikipedia.org)
  • Improved implantable defibrillator electrodes and methods of implanting such electrodes are disclosed. (freepatentsonline.com)
  • The present invention generally relates to medical devices and, more particularly, to implantable medical devices having electrodes and methods of making implantable medical devices having electrodes. (google.com)
  • METHODS: Eighteen patients of cochlear implant (MEDEL Combi 40+) recipients were involved in this study. (elsevier.com)
  • They are implanted next to a nerve or adjacent to a muscle at the motor point near to where the nerve attaches. (southampton.ac.uk)
  • The result in both cases is that they rub against and irritate the brain tissue, and the nerve cells around the electrodes die. (healthcanal.com)
  • The intimate contact of the array with the nerve fibers achieves more precise activation of fibers signaling specific frequencies, reduced electrical current requirements and dramatically reduced interference among electrodes when they are stimulated simultaneously, Middlebrooks says. (bio-medicine.org)
  • Thus, the visualization task for this dataset is to determine whether the tips of the electrode array are correctly positioned with respect to the path of the nerve, as indicated by the surrounding bone surfaces. (utah.edu)
  • It's simple and works a little like a pacemaker: An implanted device electrically stimulates the vagus nerve, but, in addition, inhibits unwanted nerve activity in a targeted manner. (gatech.edu)
  • We use an electrode with a kilohertz frequency that blocks unwanted nerve conduction in addition to the electrode that stimulates nerve activity," said principal investigator Robert Butera, a professor jointly appointed in Georgia Tech's School of Electrical and Computer Engineering and the Wallace H. Coulter Department of Biomedical Engineering . (gatech.edu)
  • This sophisticated communication link receives digital representations of sound from the external sound processor and sends information about the status of the implant system and your hearing nerve back to the processor. (advancedbionics.com)
  • Each electrode is said to measure less than 2.4 mm in diameter by 16.5 mm in length and is implanted within the muscle near to where the nerve attaches, a place called the motor point. (theengineer.co.uk)
  • A cochlear implant skips around the hair cells and sends sound right to the nerve. (asha.org)
  • The electric implant is embedded in the neck of patients with rheumatoid arthritics, the implant sends electrical signals to electrodes in the vagus nerve . (wikipedia.org)
  • More than 325,000 people worldwide use cochlear implants to overcome profound deafness. (waikato.ac.nz)
  • Patients: Fifty-six patients with functional deafness who had undergone cochlear implant surgery and received a Flex 28 electrode (MED-EL GmbH, Innsbruck, Austria) between 2011 and 2014. (uni-muenchen.de)
  • In the United States, over 96,000 people have cochlear implants (Source: National Institutes on Deafness and Other Communication Disorders, 2017). (asha.org)
  • Revision surgery due to magnet dislocation in cochlear implant patients: An emerging complication," Otology & Neurotology , vol. 35, no. 1, pp. 29-34, 2014. (hindawi.com)
  • Cadaveric feasibility study of da Vinci Si-assisted cochlear implant with augmented visual navigation for otologic surgery," JAMA Otolaryngology-Head & Neck Surgery , vol. 140, no. 3, pp. 208-214, 2014. (hindawi.com)
  • A robot-guided minimally invasive approach for cochlear implant surgery: preliminary results of a temporal bone study," International Journal of Computer Assisted Radiology and Surgery , vol. 4, no. 5, pp. 475-486, 2009. (hindawi.com)
  • Although this is only a preliminary study, we believe that these results provide a strong indication to the potential of robot-assisted cochlear implant surgery to provide a significant reduction in trauma rates during cochlear implant surgery. (springer.com)
  • HiFocus electrode contacts are encased in a slim flexible tapered silicone carrier to minimize insertion forces and damage to cochlear structures during surgery. (advancedbionics.com)
  • To make insertion easy and to provide flexibility for surgeons, the implant is designed for a shallow 1mm ramped recess, requiring minimal drilling to reduce surgery time. (advancedbionics.com)
  • The Profile Plus Implant features a thin design that follows the natural curvature of the head for an improved aesthetic outcome and the potential of less time in surgery. (cochlear.com)
  • It is vitally important to preserve this residual hearing during cochlear implant surgery as it enables the individual to use the natural hearing they have left. (medel.com)
  • Because of this design, our electrodes help to reduce damage that could be caused by cochlear implant surgery. (medel.com)
  • What Happens During Cochlear Implant Surgery? (kidshealth.org)
  • Cochlear implant surgery is done under general anesthesia . (kidshealth.org)
  • Are There Risks to Cochlear Implant Surgery? (kidshealth.org)
  • The audiologist will turn on the cochlear implants about 2-4 weeks after surgery. (kidshealth.org)
  • In a single surgery, electrodes are first separately implanted into the appropriate body parts and the target brain areas. (nih.gov)
  • Psychophysical studies were conducted on 10 cochlear implant patients, between 5 and 23 years of age at the time of surgery, who were deafened prior to 4 years of age. (edu.au)
  • The implant is only switched on and stimulated after the eye has recovered fully from the effects of surgery. (implantable-device.com)
  • Role of electrode placement as a contributor to variability in cochlear implant outcomes," Otology & Neurotology , vol. 29, no. 7, pp. 920-928, 2008. (hindawi.com)
  • Researchers are looking for ways to miniaturise and improve these electrodes for better health outcomes. (waikato.ac.nz)
  • By minimizing cochlear disruption, HiFocus electrodes offer an increased opportunity for better hearing outcomes. (advancedbionics.com)
  • Immediate and 1-Year Outcomes with a Slim Modiolar Cochlear Implant Electrode Array. (bvsalud.org)
  • For long-term outcomes, speech performance was comparable to that of other cochlear implants . (bvsalud.org)
  • While hearing preservation for the SME may be better than prior perimodiolar electrodes , consistent outcomes are unlikely. (bvsalud.org)
  • Image credit: Takashi Kozai ANN ARBOR-A thin, flexible electrode developed at the University of Michigan is 10 times smaller than the nearest competition and could make long-term measurements of neural activity practical at last. (umich.edu)
  • Conclusion: Despite the use of a flexible electrode, complete preservation of low frequency residual hearing can only be achieved in a minority of patients. (uni-muenchen.de)
  • One embodiment of the defibrillator electrodes includes a flexible conductive mesh and non-conductive mesh. (freepatentsonline.com)
  • Another embodiment of the defibrillator electrodes includes a flexible conductive mesh, a non-conductive mesh and an insulator therebetween. (freepatentsonline.com)
  • Due to the fact that the traditional electrodes of neural interfaces made of platinum or gold, for example, are rigid, they require conductive polymer coatings to bring their flexibility closer to that of neural tissue. (ehu.eus)
  • It offers cochlear implants, bone-anchored hearing systems and middle ear implants for people with sensorineural, conductive or mixed hearing loss. (consumeraffairs.com)
  • The body member carries a plurality of spaced-apart conductive electrode members. (google.ca)
  • Examples include the intraocular lens , intrastromal corneal ring segment , cochlear implant , tympanostomy tube , and neurostimulator . (wikipedia.org)
  • Because this electrode is so small and unobtrusive, it may be able to stay in the brain for long periods without upsetting the immune system, perhaps picking up signals to send to prosthetic limbs. (umich.edu)
  • This kind of technology could eventually be used to send signals to prosthetic limbs, overcoming inflammation larger electrodes cause that damages both the brain and the electrodes. (umich.edu)
  • A noninvasive way to control prosthetic limbs from brain signals without the need for implanted communication would be very helpful," said Marasco, who is not affiliated with this research. (engadget.com)
  • An experiment was conducted to investigate the possibility that speech perception could be improved for some cochlear implant (CI) users by adjustment of the frequency allocation to the electrodes, following assessment of pitch perception along the electrode array. (soton.ac.uk)
  • Grasmeder, Mary , Verschuur, Carl , Van Besouw, Rachel , Wheatley, Anne M.H. and Newman, Tracey (2018) Measurement of pitch perception as a function of cochlear implant electrode and its effect on speech perception with different frequency allocations. (soton.ac.uk)
  • Deactivating cochlear implant electrodes to improve speech perception: A computational approach. (slesystems.com)
  • A potential bottleneck to improving speech perception performance in cochlear implant (CI) users is that some of their electrodes may poorly encode speech information. (slesystems.com)
  • Several studies have examined the effect of deactivating poorly encoding electrodes on speech perception with mixed results. (slesystems.com)
  • The insertion depth of the electrode can be evaluated indirectly. (elsevier.com)
  • In contrast, the images from CT scans with 3D reconstruction of the inner ear demonstrate more accurately the shape, the position, and the insertion depth of the electrode. (elsevier.com)
  • 9,10 Insertion depth along with the most active sequential contacts in the industry - 22 electrodes 1 - help provide access to the full spectrum of sound and a richer hearing experience. (cochlear.com)
  • We assembled IEMDs with two biocompatible electrodes, specifically, MnO 2 nanoparticles affixed to multi-walled carbon nanotubes as the positive electrodes and phosphidated activated carbon as the negative electrodes. (elsevier.com)
  • The two biocompatible electrodes were successfully implanted into the subcutaneous layer of a rat's skin with both electrodes showing stable performance in use as parts of a supercapacitor. (elsevier.com)
  • Each one is the size of a fat quarter, a platinum electrode array encased in biocompatible plastic. (wired.com)
  • The cochlear implant is the most successful bionic prosthesis and has transformed the lives of people with profound hearing loss. (sciencemag.org)
  • The electrochemical properties of sputtered iridium oxide (SIROF) electrodes implanted chronically in mini-pig were characterized as part of the Boston Retinal Implant Project effort to develop a sub-retinal vision prosthesis. (arvojournals.org)
  • Rickard Brånemark of Sahlgrenska University Hospital, who helped develop the implant technology, says this bone-anchored approach, "allows complete degree of motion for the patient, fewer skin related problems and a more natural feeling that the prosthesis is part of the body. (newatlas.com)
  • Examples include the breast implant , nose prosthesis , ocular prosthesis , and injectable filler . (wikipedia.org)
  • The multiple-electrode prosthesis manufactured by Cochlear Ltd. was used. (edu.au)
  • A chronic electrode implant is an electronic device implanted chronically (for a long period) into the brain or other electrically excitable tissue. (wikipedia.org)
  • While we found no evidence that reactive gliosis increases over time or that neuronal loss is progressive, we did find evidence of persistent inflammation and enhanced BBB permeability at the electrode brain tissue interface that extended over the 3 month indwelling period and that exhibited more animal to animal variability at 3 months than at 2 and 4 weeks. (nih.gov)
  • Scientists at the Washington National Primate Research Centre have found a way to restore movement to paralysed monkeys through the use of brain implants. (gizmodo.com.au)
  • Equipped with roving electrodes, these implants seek out and restore neural connections between in the brain and the rest of the body necessary for movement. (gizmodo.com.au)
  • The electrodes are able to detect where the strongest movement signal is coming from, and attach itself to that area of the brain. (gizmodo.com.au)
  • First, the electrode must be bio-friendly, that is, we have to be confident that it does not cause any significant damage to the brain tissue. (healthcanal.com)
  • Second, the electrode must be flexible in relation to the brain tissue. (healthcanal.com)
  • In order to implant such electrodes, the researchers have developed a technique for encapsulating the electrodes in a hard but dissolvable gelatine material that is also very gentle on the brain. (healthcanal.com)
  • This technology retains the electrodes in their original form inside the brain and can monitor what happens inside virtually undisturbed and normally functioning brain tissue", says Johan Agorelius, a doctoral student in the project. (healthcanal.com)
  • Our new technology enables us to implant as flexible electrodes as we want, and retain the exact shape of the electrode within the brain", says Johan Agorelius. (healthcanal.com)
  • Two Case Western Reserve University researchers are building implants made of diamond and flexible polymer that are designed to identify chemical and electrical changes in the brain of patients suffering from neural disease, or to stimulate nerves and restore movement in the paralyzed. (nanowerk.com)
  • The array of electrodes consists of eight flexible channels, designed to follow the movement of the brain. (medicalxpress.com)
  • The resident immune cells spot the foreigner and attack, inflaming the brain tissue and blocking communication between the electrode and the cells. (umich.edu)
  • Kipke stressed that the electrode that the team tested is not a clinical trial-ready device, but it shows that efforts to shrink electrodes toward the size of brain cells are paying off. (umich.edu)
  • In order to listen to a neuron for long, or help people control a prosthetic as they do a natural limb, the electrodes need to be able to survive for years in the brain without doing significant damage. (umich.edu)
  • Studies have shown that heating occurs primarily in the metal tip of the implant, for example, a deep brain stimulator, the heating occurs mainly around the contact electrodes. (google.com)
  • Heart, cochlear, spinal-cord and deep-brain stimulators all deliver therapeutic stimuli through electrodes implanted in the human body. (waikato.ac.nz)
  • We used the cochlear implant electrode array for novel "close-field" electroporation to transduce mesenchymal cells lining the cochlear perilymphatic canals with a naked complementary DNA gene construct driving expression of brain-derived neurotrophic factor ( BDNF ) and a green fluorescent protein ( GFP ) reporter. (sciencemag.org)
  • A surgeon in the USA recently fit electrodes in his patient's brain to treat his severe opioid addiction. (mecda.org)
  • It relies on electrodes that are implanted in the brain and linked to a pacemaker that emits electrical impulses. (sciencenordic.com)
  • The method comprises implanting an optically powered, integrated wireless neural electrode-telemetry module into the brain or spinal cord of a subject. (patentsencyclopedia.com)
  • A 3D reconstruction of the brain shows the location of implanted stereo electroencephalography (stereo EEG) electrodes. (mayoclinic.org)
  • The skin pickups used in many mechanical arms to provide the user with control by muscle impulses are replaced by electrodes that have been permanently implanted in nerves and muscles, so commands can come directly from the brain to the arm. (newatlas.com)
  • Brain implants, on the other hand, are typically made from metal and other rigid materials that over time can cause inflammation and the buildup of scar tissue. (mit.edu)
  • Such flexible electronics could be softer alternatives to existing metal-based electrodes designed to monitor brain activity, and may also be useful in brain implants that stimulate neural regions to ease symptoms of epilepsy, Parkinson's disease, and severe depression. (mit.edu)
  • The team printed several soft electronic devices, including a small, rubbery electrode, which they implanted in the brain of a mouse. (mit.edu)
  • Monitoring this activity can give scientists a higher-resolution picture of the brain's activity, and can help in tailoring therapies and long-term brain implants for a variety of neurological disorders. (mit.edu)
  • US neuroscientists are hoping to restore speech to a man who has been paralysed for eight years, and is unable to communicate other than through eye movements, with the help of a brain implant. (medindia.net)
  • Eric Ramsey had a wireless electrode implanted about 6 millimetres below the surface of his brain in 2004. (medindia.net)
  • Scientists are working on a brain implant with the ability to more reliably detect and forestall epileptic seizures. (medindia.net)
  • Implanting electrodes in the brain could help treat people who are suffering from severe depression, but do not succeed in responding to traditional treatment. (medindia.net)
  • The research is based on the BION microstimulators (Alfred Mann Foundation, Valencia, CA, USA) that once implanted into a patient's arm act like 'bionic neurones' mimicking the messages from the brain to recreate useful function in paralysed or weak arms. (theengineer.co.uk)
  • We analyzed the functional consequences of EE on aged brain physiology by performing in vivo local field potential (LFP) recordings with chronic implants. (frontiersin.org)
  • This third electrode is used to give a rewarding electrical stimulus to the brain when the rat makes the correct move to the left or right. (wikipedia.org)
  • Analyzing the brain's electrical activity to gain insights into its function can be achieved with electrodes either placed upon the scalp-as in electroencephalograms (EEGs)-or inserted into the brain. (the-scientist.com)
  • The alginate hydrogel, partially derived from algae, gives the electrodes mechanical properties more similar to actual brain tissue than the current technology. (medgadget.com)
  • Sensory and neurological implants are used for disorders affecting the major senses and the brain, as well as other neurological disorders. (wikipedia.org)
  • Electronic implants can help us better understand the brain. (technologyreview.com)
  • The therapy involves inserting electrodes into certain regions of the brain and producing electrical pulses meant to regulate abnormal ones. (technologyreview.com)
  • This project is significant because BCIs that operate robotic devices like this typically use signals from brain implants. (engadget.com)
  • This new research shows that BCIs that transmit brain signals remotely without implants can be as strong and as effective as those that require invasive procedures. (engadget.com)
  • People do not typically want to risk a brain implant to control a prosthetic. (engadget.com)
  • It is designed to be implanted in the skull, with the wires embedded a few millimetres into the surface of the brain. (newscientist.com)
  • On the far side of the pedestal, buried beneath hair and skin, is the wetware: a pair of brain implants. (wired.com)
  • Dobelle has designed a three-part system: a miniature video camera, a signal processor, and the brain implants. (wired.com)
  • The processor translates the image into a series of signals that the brain can understand, then sends the information to the implant. (wired.com)
  • The idea, in true Muskian fashion sounds outlandish - Neuralink will work on implanting tiny brain electrodes into people's heads that will one day upload and download thoughts. (officechai.com)
  • The company's first products could be advanced implants to treat intractable brain disorders like epilepsy or major depression. (officechai.com)
  • Prevalence and complications of MRI scans of cochlear implant patients: German version," HNO , vol. 64, no. 3, pp. 156-162, 2016. (hindawi.com)
  • The substrate comprises electrodes for stimulating cells within the retina. (google.com)
  • The implant, further, comprises a photovoltaic layer responsive to non-visible light. (google.com)
  • The implant comprises a knitted mesh having a mass density of less than 25 g/m2. (google.ca)
  • The implant comprises a knitted mesh having a mass density of less than 25 g/m 2 . (google.ca)
  • We show in the guinea pig that neurotrophin gene therapy integrated into the cochlear implant improves its performance by stimulating spiral ganglion neurite regeneration. (sciencemag.org)
  • Current Steering allows to stimulate the Spiral Ganglion cell population between electrode contacts. (advancedbionics.com)
  • Scientists pursued the idea of implanting tiny electronic hearing devices in the inner ear to help profoundly deaf people. (bio-medicine.org)
  • 7 The electrode-modiolus distance and the preservation of inner ear structures are also important factors. (ajnr.org)
  • OBJECTIVE: To evaluate the image feature of the X-ray plain film, the spiral computed tomography (CT) scans and three dimension reconstruction of inner ear with implanted electrode. (elsevier.com)
  • Promising results have been reported from a world-first study of cochlear implant electrodes designed to stimulate hearing nerves and slowly release drugs into the inner ear. (sciencemeetsbusiness.com.au)
  • This electrode is about seven microns in diameter, or 0.007 millimeters, and its closest competitor is about 25 to 100 microns. (umich.edu)
  • It is also less invasive than previous generations of neural implants and because the electrodes are so small they can be implanted into many different muscles, providing the potential to create the fine, graded movement essential for hand and arm function. (southampton.ac.uk)
  • MIT engineers are working on developing soft, flexible neural implants that can gently conform to the brain's contours and monitor activity over longer periods, without aggravating surrounding tissue. (mit.edu)
  • In principle these systems are susceptible to the same tissue response that causes failure in implanted electrodes, but stimulating interfaces can overcome this problem by increasing signal strength. (wikipedia.org)
  • It is ultimately this tissue response that causes electrodes to fail by encapsulating the electrode itself in a protective layer called a "glial scar," (see 2.2). (wikipedia.org)
  • 23] The overall observed tissue response is caused by a combination of the traumatic injury of electrode insertion and the persistent presence of a foreign body in the neural tissue. (wikipedia.org)
  • Damage caused by electrodes in the short term is caused by the insertion into the tissue. (wikipedia.org)
  • Short term effects of electrode insertion on surrounding tissue have been documented extensively. (wikipedia.org)
  • 2006 study, an ex vivo apparatus was constructed explicitly to study the deformation of and damage to neural tissue during electrode insertion. (wikipedia.org)
  • Anti CD-163 immunostaining of macrophages located in the fibrous tissue layers surrounding a cochlear implant in case #28. (nih.gov)
  • Diamond is so hard and rigid, however, that an entire implant made of the stuff would quickly damage surrounding tissue and the body would seal off the implant as if it were a splinter, Zorman said. (nanowerk.com)
  • Immune reactions and the development of scar tissue can reduce the effective surface area of the electrodes and limit both the therapeutic stimulus and the battery life of the implant. (waikato.ac.nz)
  • This drug is intended to reduce inflammation and the growth of fibrous tissue around the electrode array triggered by the body's immune response. (sciencemeetsbusiness.com.au)
  • That means coated neural electrodes would cause less tissue damage. (medgadget.com)
  • Medical implants are man-made devices, in contrast to a transplant , which is a transplanted biomedical tissue . (wikipedia.org)
  • Recording them requires inserting electrodes into the tissue. (technologyreview.com)
  • Existing implantable electrodes are too large and rigid, and this "mechanical mismatch" leads to tissue damage and immune response, he says. (technologyreview.com)
  • The new electrode developed by the teams of Daryl Kipke, a professor of biomedical engineering, Joerg Lahann, a professor of chemical engineering, and Nicholas Kotov, the Joseph B. and Florence V. Cejka Professor of Engineering, is unobtrusive and even friendly in comparison. (umich.edu)
  • The surface of implants that contact the body might be made of a biomedical material such as titanium , silicone , or apatite depending on what is the most functional. (wikipedia.org)
  • The carrier member (11) is made of a resiliently flexible first material and has a plurality of electrodes. (google.com)
  • a plurality of elongated conducting members with each said conducting member having an end in electrical contact with a respective one of said electrode members. (google.ca)
  • 2. A multi-element electrode structure as in claim 1 with said plurality of elongated conducting members carrying an electrical connector displaced from said sheet member. (google.ca)
  • 8. A method as in claim 7 including removing the probe from the esophagus and then removing the plurality of electrodes from the housing of the probe. (google.ca)
  • a plurality of spaced-apart electrodes carried on said body portion between said proximal end and said transmitter but spaced therefrom thereby providing the independent positioning of said transmitter with respect to the subject's heart and for independent selection of a pacing electrode for pacing the heart. (google.ca)
  • 11. A probe as in claim 10 with said plurality of electrodes removably attached to said body portion. (google.ca)
  • 16. A probe as in claim 10 including means for electrical conduction coupled to at least some members of said plurality of electrodes and extending to said proximal end of said body portion. (google.ca)
  • Reliability of cone beam computed tomography in scalar localization of the electrode array: a radio histological study," European Archives of Oto-Rhino-Laryngology , vol. 271, no. 4, pp. 673-679, 2014. (hindawi.com)
  • As the number of electrodes and wires increases, the wires must either be finer, or the array must become thicker. (cochlearimplanthelp.com)
  • This monitor does not use wires or electrodes. (medlineplus.gov)
  • Three of the cochlear implant recipients were examined by the way of spiral CT scans with axial 1 mm image slices. (elsevier.com)
  • 3,4,5 In fact, using psychoacoustic tests, some AB implant recipients can hear as many as 451 distinct pitches with current steering. (advancedbionics.com)
  • All Advanced Bionics recipients or their caregivers can be confident that the implant is functioning properly and that they can benefit from all features of our technology thanks to the proprietary Bidirectional Inductive Communication Link that relays information about the implant's functional status in real time back to the sound processor. (advancedbionics.com)
  • The HiRes™ Ultra and 90K Advantage cochlear implants exceed the industry standard for impact resistance 12, 13, 14 and allow recipients to participate in everyday activities and sports without worry. (advancedbionics.com)
  • Hearing preservation is essential for all cochlear implant recipients for two main reasons. (medel.com)
  • Therefore, for all cochlear implant recipients, hearing preservation during a cochlear implant procedure is essential for their hearing both now and in the future. (medel.com)
  • Gap detection threshold (GDT) is a commonly used measure of temporal acuity in cochlear-implant (CI) recipients. (biomedsearch.com)
  • Artifacts caused by cochlear implants with non-removable magnets in 3T MRI: Phantom and cadaveric studies," European Archives of Oto-Rhino-Laryngology , vol. 266, no. 12, pp. 1885-1890, 2009. (hindawi.com)
  • When creating the hydrogel, they took its use in neural interfaces into consideration, in other words, the components responsible for the electrical connection in implants that interact with the nervous system. (ehu.eus)
  • The present invention relates to the technical field of implantable medical devices, and more particularly, relates to an implantable electrode, and comprising the bio-medical electrode assembly. (google.com)
  • S. Schmerber, E. Reyt, and J.-P. Lavieille, "Is magnetic resonance imaging still a contraindication in cochlear-implanted patients? (hindawi.com)
  • Similar devices have been implanted in patients' arms or shoulders in the US, Canada and Japan, but this is the first time that the operation has taken place in the UK to achieve a coordinated hand and arm movement. (southampton.ac.uk)
  • The use of a full insertion electrode of 28mm in patients with poor preoperative thresholds does not allow for usable additional hearing at present. (uni-muenchen.de)
  • Two patients presented with failure of their long-standing cochlear implants (CIs). (ovid.com)
  • Both patients can use their devices effectively with selective electrode deactivation. (ovid.com)
  • OBJECTIVE: A retrospective study in 5 patients with pharmacoresistant epilepsy was performed to evaluate whether an elastic image fusion algorithm can provide a more accurate projection of the electrode contacts on the preimplantation magnetic resonance images compared with linear fusion. (uzh.ch)
  • The implanted electrode of all patients were examined on the fifth to seventh postoperative day, by the use of X-ray plain film with either anteroposterior transorbital projection (nine cases) or lateral position with coronal 60 degrees away from the examine table (nine cases). (elsevier.com)
  • After completing extensive biosafety studies, HEARing CRC researchers progressed to a study of the experimental electrode in ten adult patients, eight at the Royal Victorian Eye and Ear Hospital in Melbourne (RVEEH) and two at the Royal Institute for Deaf and Blind Children - Sydney Cochlear Implant Clinic (SCIC). (sciencemeetsbusiness.com.au)
  • A new strategy to quantify the levels of titanium in the blood of patients fitted with titanium orthopaedic implants is presented in Analytical and Bioanalytical Chemistry , a Springer journal. (phys.org)
  • In order to assess the implications of these 'leaks', it is essential to accurately measure the basal, normal levels of titanium in the bloodstream, as well as quantify how much higher levels are in patients with implants. (phys.org)
  • Nuevo-Ordóñez and team collected blood from 40 healthy individuals and 37 patients with titanium implants - 15 had tibia implants, eight had femur implants, and 14 had humerus implants (eight internal and six external fixation implants). (phys.org)
  • They found that control individuals had very low levels of titanium in the blood whereas titanium concentrations were significantly higher for all the patients with implants. (phys.org)
  • Titanium release in serum of patients with different bone fixation implants and its interaction with serum biomolecules at physiological levels. (phys.org)
  • The limens for electrode position, measured in a discrimination task, were 1-3 electrodes for most patients. (edu.au)
  • However, for 3 patients, limens of 6-10 electrodes were recorded. (edu.au)
  • Pallidal activity recorded in patients with implanted electrodes predictively correlates with eventual performance in a timing task. (ox.ac.uk)
  • Magnetic Resonance Imaging (MRI) machines can generate hazardous RF heating of patients with implanted neurostimulation leads. (waikato.ac.nz)
  • Consequently, most patients with these implants are contraindicated from having MRI scans. (waikato.ac.nz)
  • The team developing the device are working on miniaturizing it so it's about the size of a pill, which would make it nearly invisible once implanted into the body. (medgadget.com)
  • The device is constructed from a silicon substrate with sputtered platinum electrodes and connection tracks. (spie.org)
  • If our work continues to go very well, we might begin human trials in no less than five years, Middlebrooks says.Such a device might be used first in people whose cochleas are filled with bone and therefore arent eligible for a cochlear implant, or people whose cochlear implants are no longer effective. (bio-medicine.org)
  • Since the risk to a radio frequency (RF) heating the implant patient and other neural stimulator or pacemaker medical device can not be of high field MRI. (google.com)
  • An irregularly etched metallic medical implant device is provided having random non-uniform relief patterns on the surface ranging from about 0.3 νm to less than about 20 νm in depth. (google.com.au)
  • 18. An irregularly etched metallic medical implant device with random non-uniform relief patterns on the surface ranging from about 0.3 ╬╝m to less than about 20 ╬╝m in depth. (google.com.au)
  • A cochlear (koe-klee-er) implant is a device that can help if you have a severe hearing loss. (asha.org)
  • An implant is a medical device manufactured to replace a missing biological structure, support a damaged biological structure, or enhance an existing biological structure. (wikipedia.org)
  • When you feel symptoms, you turn on the device and place the electrodes on your chest to record the ECG. (medlineplus.gov)
  • This is a world first - we implanted a device in this position behind the retina, demonstrating the viability of our approach. (implantable-device.com)
  • Rajan et al 9 showed that a slow electrode insertion speed can promote preservation of residual hearing. (ajnr.org)
  • Hearing preservation is important, as many candidates for cochlear implants have significant residual acoustic hearing, and want to be assured that they can use their residual acoustic hearing together with their cochlear implants. (sciencemeetsbusiness.com.au)
  • All our implants are designed to last a lifetime with performance and preservation of the cochlear structures in mind. (cochlear.com)
  • These measurements employed neuron -monitoring technology developed earlier at U-M. The scientists found their sensitive 16-electrode microarray resulted in several advantages over cochlear implants. (bio-medicine.org)
  • In China , a patient suffering from severe methamphetamine addiction was fitted with the same kind of electrodes. (mecda.org)
  • Patient with orthopaedic implants sometimes need to be put under magnetic resonance imaging (MRI) machine for detailed musculoskeletal study. (wikipedia.org)
  • There are only three cochlear implants that are FDA-approved," Dr. Briggs says, "but, ultimately, the choice is up to the patient. (consumeraffairs.com)
  • Factors affecting open-set word recognition in adults with cochlear implants," Ear and Hearing , vol. 34, no. 3, pp. 342-360, 2013. (hindawi.com)
  • Scientists pursued the idea of implanting tiny electronic hearing devi. (bio-medicine.org)
  • A second with postmeningitic hearing loss presented with a draining mastoid fistula from an implant placed 7 years before. (ovid.com)
  • This drug-eluting electrode research has been made possible through the collaboration of Cochlear, RVEEH, and RIDBC-SCIC as members of the HEARing CRC, supported through the Commonwealth Governments CRC Programme. (sciencemeetsbusiness.com.au)
  • The HEARing CRC collaboration has contributed to commercial cochlear implant technologies that are now in world-wide use, as well as fitting technologies for both cochlear implants and hearing aids, helping to maintain Australia's preeminent international standing in hearing research and service delivery," says Cowan. (sciencemeetsbusiness.com.au)
  • In addition, it is built on the same platform as the industry's most reliable implant so you can feel confident that the implant will provide unparalled hearing peformance for years to come. (cochlear.com)
  • In combination with a cochlear implant, being able to use this natural hearing provides the user with the best possible listening experience. (medel.com)
  • Is Hearing With a Cochlear Implant Like Normal Hearing? (kidshealth.org)
  • Sound quality from a cochlear implant is different from that in normal hearing. (kidshealth.org)
  • Doctors consider cochlear implants for children under 12 months of age with profound hearing loss in both ears. (kidshealth.org)
  • Older children with serious hearing loss also may get cochlear implants. (kidshealth.org)
  • Depending on a child's hearing, the doctor may recommend getting two cochlear implants, one for each ear. (kidshealth.org)
  • Since the 1970s, thousands of people who are severely hard of hearing or deaf have chosen to try cochlear implants to hear sounds better. (consumeraffairs.com)
  • Cochlear implants are very different from hearing aids," Dr. Selena Briggs told ConsumerAffairs. (consumeraffairs.com)
  • In addition to cochlear implants, other types of hearing implants may be a good choice for you depending on the type of hearing loss you have. (consumeraffairs.com)
  • Most hearing implants cost about $40,000 before insurance, but each brand has different features to keep in mind before choosing the best one for you. (consumeraffairs.com)
  • It offers hearing aids along with implantable hearing solutions, including the Ponto bone-anchored hearing system and the Neuro cochlear implant system. (consumeraffairs.com)
  • What are the components of a hearing implant? (consumeraffairs.com)
  • Cochlear implants and other hearing implants might look complicated, but they are relatively simple tools. (consumeraffairs.com)
  • The various types of hearing implants involve a similar process. (consumeraffairs.com)
  • At the end of April, five AMF RF microstimulators were implanted close to the nerves supplying muscles in a female patient's arm under local anaesthetic at Southampton General Hospital. (southampton.ac.uk)