An autoimmune disorder mainly affecting young adults and characterized by destruction of myelin in the central nervous system. Pathologic findings include multiple sharply demarcated areas of demyelination throughout the white matter of the central nervous system. Clinical manifestations include visual loss, extra-ocular movement disorders, paresthesias, loss of sensation, weakness, dysarthria, spasticity, ataxia, and bladder dysfunction. The usual pattern is one of recurrent attacks followed by partial recovery (see MULTIPLE SCLEROSIS, RELAPSING-REMITTING), but acute fulminating and chronic progressive forms (see MULTIPLE SCLEROSIS, CHRONIC PROGRESSIVE) also occur. (Adams et al., Principles of Neurology, 6th ed, p903)
The medial terminal branch of the sciatic nerve. The tibial nerve fibers originate in lumbar and sacral spinal segments (L4 to S2). They supply motor and sensory innervation to parts of the calf and foot.
The most common clinical variant of MULTIPLE SCLEROSIS, characterized by recurrent acute exacerbations of neurologic dysfunction followed by partial or complete recovery. Common clinical manifestations include loss of visual (see OPTIC NEURITIS), motor, sensory, or bladder function. Acute episodes of demyelination may occur at any site in the central nervous system, and commonly involve the optic nerves, spinal cord, brain stem, and cerebellum. (Adams et al., Principles of Neurology, 6th ed, pp903-914)
A form of multiple sclerosis characterized by a progressive deterioration in neurologic function which is in contrast to the more typical relapsing remitting form. If the clinical course is free of distinct remissions, it is referred to as primary progressive multiple sclerosis. When the progressive decline is punctuated by acute exacerbations, it is referred to as progressive relapsing multiple sclerosis. The term secondary progressive multiple sclerosis is used when relapsing remitting multiple sclerosis evolves into the chronic progressive form. (From Ann Neurol 1994;36 Suppl:S73-S79; Adams et al., Principles of Neurology, 6th ed, pp903-914)
A pathological process consisting of hardening or fibrosis of an anatomical structure, often a vessel or a nerve.
Disease of the TIBIAL NERVE (also referred to as the posterior tibial nerve). The most commonly associated condition is the TARSAL TUNNEL SYNDROME. However, LEG INJURIES; ISCHEMIA; and inflammatory conditions (e.g., COLLAGEN DISEASES) may also affect the nerve. Clinical features include PARALYSIS of plantar flexion, ankle inversion and toe flexion as well as loss of sensation over the sole of the foot. (From Joynt, Clinical Neurology, 1995, Ch51, p32)
A degenerative disorder affecting upper MOTOR NEURONS in the brain and lower motor neurons in the brain stem and SPINAL CORD. Disease onset is usually after the age of 50 and the process is usually fatal within 3 to 6 years. Clinical manifestations include progressive weakness, atrophy, FASCICULATION, hyperreflexia, DYSARTHRIA, dysphagia, and eventual paralysis of respiratory function. Pathologic features include the replacement of motor neurons with fibrous ASTROCYTES and atrophy of anterior SPINAL NERVE ROOTS and corticospinal tracts. (From Adams et al., Principles of Neurology, 6th ed, pp1089-94)
A synthetic opioid that is used as the hydrochloride. It is an opioid analgesic that is primarily a mu-opioid agonist. It has actions and uses similar to those of MORPHINE. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1082-3)
The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the visual pathways.
Drugs obtained and often manufactured illegally for the subjective effects they are said to produce. They are often distributed in urban areas, but are also available in suburban and rural areas, and tend to be grossly impure and may cause unexpected toxicity.
Disorders related or resulting from abuse or mis-use of opioids.
Medical treatment for opioid dependence using a substitute opiate such as METHADONE or BUPRENORPHINE.
Agents that induce NARCOSIS. Narcotics include agents that cause somnolence or induced sleep (STUPOR); natural or synthetic derivatives of OPIUM or MORPHINE or any substance that has such effects. They are potent inducers of ANALGESIA and OPIOID-RELATED DISORDERS.
The continuous sequential physiological and psychological maturing of an individual from birth up to but not including ADOLESCENCE.
Function of the human eye that is used in bright illumination or in daylight (at photopic intensities). Photopic vision is performed by the three types of RETINAL CONE PHOTORECEPTORS with varied peak absorption wavelengths in the color spectrum (from violet to red, 400 - 700 nm).
Messages between computer users via COMPUTER COMMUNICATION NETWORKS. This feature duplicates most of the features of paper mail, such as forwarding, multiple copies, and attachments of images and other file types, but with a speed advantage. The term also refers to an individual message sent in this way.
Mental processing of chromatic signals (COLOR VISION) from the eye by the VISUAL CORTEX where they are converted into symbolic representations. Color perception involves numerous neurons, and is influenced not only by the distribution of wavelengths from the viewed object, but also by its background color and brightness contrast at its boundary.
Type of vision test used to determine COLOR VISION DEFECTS.
Defects of color vision are mainly hereditary traits but can be secondary to acquired or developmental abnormalities in the CONES (RETINA). Severity of hereditary defects of color vision depends on the degree of mutation of the ROD OPSINS genes (on X CHROMOSOME and CHROMOSOME 3) that code the photopigments for red, green and blue.
The visually perceived property of objects created by absorption or reflection of specific wavelengths of light.
The study of natural phenomena by observation, measurement, and experimentation.
A major nerve of the upper extremity. In humans, the fibers of the median nerve originate in the lower cervical and upper thoracic spinal cord (usually C6 to T1), travel via the brachial plexus, and supply sensory and motor innervation to parts of the forearm and hand.
Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum.
Electrical waves in the CEREBRAL CORTEX generated by BRAIN STEM structures in response to auditory click stimuli. These are found to be abnormal in many patients with CEREBELLOPONTINE ANGLE lesions, MULTIPLE SCLEROSIS, or other DEMYELINATING DISEASES.
The electric response evoked in the CEREBRAL CORTEX by stimulation along AFFERENT PATHWAYS from PERIPHERAL NERVES to CEREBRUM.
The terms, expressions, designations, or symbols used in a particular science, discipline, or specialized subject area.
The region of the upper limb in animals, extending from the deltoid region to the HAND, and including the ARM; AXILLA; and SHOULDER.
Tools used in dentistry that operate at high rotation speeds.
Dental methods involving the use of DENTAL HIGH-SPEED EQUIPMENT.
The nonexpendable items used by the dentist or dental staff in the performance of professional duties. (From Boucher's Clinical Dental Terminology, 4th ed, p106)
Efforts to prevent and control the spread of infections within dental health facilities or those involving provision of dental care.
An operation in which carious material is removed from teeth and biomechanically correct forms are established in the teeth to receive and retain restorations. A constant requirement is provision for prevention of failure of the restoration through recurrence of decay or inadequate resistance to applied stresses. (Boucher's Clinical Dental Terminology, 4th ed, p239-40)
Species- or subspecies-specific DNA (including COMPLEMENTARY DNA; conserved genes, whole chromosomes, or whole genomes) used in hybridization studies in order to identify microorganisms, to measure DNA-DNA homologies, to group subspecies, etc. The DNA probe hybridizes with a specific mRNA, if present. Conventional techniques used for testing for the hybridization product include dot blot assays, Southern blot assays, and DNA:RNA hybrid-specific antibody tests. Conventional labels for the DNA probe include the radioisotope labels 32P and 125I and the chemical label biotin. The use of DNA probes provides a specific, sensitive, rapid, and inexpensive replacement for cell culture techniques for diagnosing infections.
The plan and delineation of prostheses in general or a specific prosthesis.
A form of interactive entertainment in which the player controls electronically generated images that appear on a video display screen. This includes video games played in the home on special machines or home computers, and those played in arcades.
Recording of visual and sometimes sound signals on magnetic tape.
The transmission and reproduction of transient images of fixed or moving objects. An electronic system of transmitting such images together with sound over a wire or through space by apparatus that converts light and sound into electrical waves and reconverts them into visible light rays and audible sound. (From Webster, 3rd ed)
Microscopy in which television cameras are used to brighten magnified images that are otherwise too dark to be seen with the naked eye. It is used frequently in TELEPATHOLOGY.
Precise and detailed plans for the study of a medical or biomedical problem and/or plans for a regimen of therapy.
The evaluation by experts of the quality and pertinence of research or research proposals of other experts in the same field. Peer review is used by editors in deciding which submissions warrant publication, by granting agencies to determine which proposals should be funded, and by academic institutions in tenure decisions.
Critical and exhaustive investigation or experimentation, having for its aim the discovery of new facts and their correct interpretation, the revision of accepted conclusions, theories, or laws in the light of newly discovered facts, or the practical application of such new or revised conclusions, theories, or laws. (Webster, 3d ed)
The biological science concerned with the life-supporting properties, functions, and processes of living organisms or their parts.
The synapse between a neuron and a muscle.
Specialized junctions at which a neuron communicates with a target cell. At classical synapses, a neuron's presynaptic terminal releases a chemical transmitter stored in synaptic vesicles which diffuses across a narrow synaptic cleft and activates receptors on the postsynaptic membrane of the target cell. The target may be a dendrite, cell body, or axon of another neuron, or a specialized region of a muscle or secretory cell. Neurons may also communicate via direct electrical coupling with ELECTRICAL SYNAPSES. Several other non-synaptic chemical or electric signal transmitting processes occur via extracellular mediated interactions.
Depolarization of membrane potentials at the SYNAPTIC MEMBRANES of target neurons during neurotransmission. Excitatory postsynaptic potentials can singly or in summation reach the trigger threshold for ACTION POTENTIALS.
A superfamily of various freshwater CRUSTACEA, in the infraorder Astacidea, comprising the crayfish. Common genera include Astacus and Procambarus. Crayfish resemble lobsters, but are usually much smaller.
The communication from a NEURON to a target (neuron, muscle, or secretory cell) across a SYNAPSE. In chemical synaptic transmission, the presynaptic neuron releases a NEUROTRANSMITTER that diffuses across the synaptic cleft and binds to specific synaptic receptors, activating them. The activated receptors modulate specific ion channels and/or second-messenger systems in the postsynaptic cell. In electrical synaptic transmission, electrical signals are communicated as an ionic current flow across ELECTRICAL SYNAPSES.
The specialized postsynaptic region of a muscle cell. The motor endplate is immediately across the synaptic cleft from the presynaptic axon terminal. Among its anatomical specializations are junctional folds which harbor a high density of cholinergic receptors.

Effect of electrotonic potentials on pacemaker activity of canine Purkinje fibers in relation to parasystole. (1/5660)

Isolated false tendons excised form dog hearts were mounted in a three-chamber tissue bath. Isotonic sucrose solution was perfused in the central chamber to provide a region of depressed conductivity between the fiber segments in chambers 1 and 3, which were perfused with Tyrode's solution. The electrotonic influence of spontaneous or driven responses evoked in chamber 3 during the first half of the spontaneous cycle of a chamber 1 peacemaker delayed the next spontaneous discharge. This effect changed to acceleration when the chamber 3 segment fired during the second half of the spontaneous cycle. We found that subthreshold depolarizing current pulses 50-300 msec applied across the sucrose gap caused similar degrees of delay or acceleration. Furthermore, hyperpolarizing currents caused the reverse pattern. The results indicate that the discharge pattern of a parasystolic focus may be altered by the electrotonic influence of activity in the surrounding tissue. The significance of these findings is considered in relation to the mechanism of production of parasystolic rhythms.  (+info)

The optically determined size of exo/endo cycling vesicle pool correlates with the quantal content at the neuromuscular junction of Drosophila larvae. (2/5660)

According to the current theory of synaptic transmission, the amplitude of evoked synaptic potentials correlates with the number of synaptic vesicles released at the presynaptic terminals. Synaptic vesicles in presynaptic boutons constitute two distinct pools, namely, exo/endo cycling and reserve pools (). We defined the vesicles that were endocytosed and exocytosed during high K+ stimulation as the exo/endo cycling vesicle pool. To determine the role of exo/endo cycling vesicle pool in synaptic transmission, we estimated the quantal content electrophysiologically, whereas the pool size was determined optically using fluorescent dye FM1-43. We then manipulated the size of the pool with following treatments. First, to change the state of boutons of nerve terminals, motoneuronal axons were severed. With this treatment, the size of exo/endo cycling vesicle pool decreased together with the quantal content. Second, we promoted the FM1-43 uptake using cyclosporin A, which inhibits calcineurin activities and enhances endocytosis. Cyclosporin A increased the total uptake of FM1-43, but neither the size of exo/endo cycling vesicle pool nor the quantal content changed. Third, we increased the size of exo/endo cycling vesicle pool by forskolin, which enhances synaptic transmission. The forskolin treatment increased both the size of exo/endo cycling vesicle pool and the quantal content. Thus, we found that the quantal content was closely correlated with the size of exo/endo cycling vesicle pool but not necessarily with the total uptake of FM1-43 fluorescence by boutons. The results suggest that vesicles in the exo/endo cycling pool primarily participate in evoked exocytosis of vesicles.  (+info)

Spinal cord-evoked potentials and muscle responses evoked by transcranial magnetic stimulation in 10 awake human subjects. (3/5660)

Transcranial magnetic stimulation (TCMS) causes leg muscle contractions, but the neural structures in the brain that are activated by TCMS and their relationship to these leg muscle responses are not clearly understood. To elucidate this, we concomitantly recorded leg muscle responses and thoracic spinal cord-evoked potentials (SCEPs) after TCMS for the first time in 10 awake, neurologically intact human subjects. In this report we provide evidence of direct and indirect activation of corticospinal neurons after TCMS. In three subjects, SCEP threshold (T) stimulus intensities recruited both the D wave (direct activation of corticospinal neurons) and the first I wave (I1, indirect activation of corticospinal neurons). In one subject, the D, I1, and I2 waves were recruited simultaneously, and in another subject, the I1 and I2 waves were recruited simultaneously. In the remaining five subjects, only the I1 wave was recruited first. More waves were recruited as the stimulus intensity increased. The presence of D and I waves in all subjects at low stimulus intensities verified that TCMS directly and indirectly activated corticospinal neurons supplying the lower extremities. Leg muscle responses were usually contingent on the SCEP containing at least four waves (D, I1, I2, and I3).  (+info)

Multiple point electrical stimulation of ulnar and median nerves. (4/5660)

A computer-assisted method of isolating single motor units (MUs) by multiple point stimulation (MPS) of peripheral nerves is described. MPS was used to isolate 10-30 single MUs from thenar and hypothenar muscles of normal subjects and patients with entrapment neuropathies, with the original purpose of obtaining a more representative mean motor unit potential for estimating the number of MUs in a muscle. The two important results that evolved from MPS however, were: (1) in the absence of 'alternation' MUs were recruited in an orderly pattern from small to large, and from longer to shorter latencies by graded electrical stimulation in both normal and pathological cases, (2) a comparison of the sizes of MUs recruited by stimulation proximal and distal to the elbow suggested that axonal branching can occur in the forearm 200 mm or more proximal to the motor point in intrinsic hand muscles.  (+info)

N-type voltage-dependent calcium channels mediate the nicotinic enhancement of GABA release in chick brain. (5/5660)

The role of voltage-dependent calcium channels (VDCCs) in the nicotinic acetylcholine receptor (nAChR)-mediated enhancement of spontaneous GABAergic inhibitory postsynaptic currents (IPSCs) was investigated in chick brain slices. Whole cell recordings of neurons in the lateral spiriform (SpL) and ventral lateral geniculate (LGNv) nuclei showed that cadmium chloride (CdCl2) blocked the carbachol-induced increase of spontaneous GABAergic IPSCs, indicating that VDCCs might be involved. To conclusively show a role for VDCCs, the presynaptic effect of carbachol on SpL and LGNv neurons was examined in the presence of selective blockers of VDCC subtypes. omega-Conotoxin GVIA, a selective antagonist of N-type channels, significantly reduced the nAChR-mediated enhancement of gamma-aminobutyric acid (GABA) release in the SpL by 78% compared with control responses. Nifedipine, an L-type channel blocker, and omega-Agatoxin-TK, a P/Q-type channel blocker, did not inhibit the enhancement of GABAergic IPSCs. In the LGNv, omega-Conotoxin GVIA also significantly reduced the nAChR-mediated enhancement of GABA release by 71% from control values. Although omega-Agatoxin-TK did not block the nicotinic enhancement, L-type channel blockers showed complex effects on the nAChR-mediated enhancement. These results indicate that the nAChR-mediated enhancement of spontaneous GABAergic IPSCs requires activation of N-type channels in both the SpL and LGNv.  (+info)

Impairment of neocortical long-term potentiation in mice deficient of endothelial nitric oxide synthase. (6/5660)

The role of the possible retrograde messenger nitric oxide (NO) in the induction of long-term potentiation (LTP) was studied in supragranular layers of somatosensory cortical slices obtained from adult mice. High-frequency stimulation produced a slowly rising, long-lasting (50 min) and significant (P < 0.001) increase in the extracellular synaptic response by 23%. The induction of LTP was independent from activation of N-methyl-D-aspartate (NMDA) receptors, but prevented by bath application of NG-nitro-L-arginine methyl ester (L-NAME), indicating that one or several of the different NO synthases (NOS) produced NO within the postsynaptic neuron. No LTP could be induced in knockout mice lacking the endothelial NOS (eNOS) isoform. These data suggest that eNOS is involved in an NMDA receptor-independent form of LTP in the rodent cerebral cortex.  (+info)

C-PR neuron of Aplysia has differential effects on "Feeding" cerebral interneurons, including myomodulin-positive CBI-12. (7/5660)

Head lifting and other aspects of the appetitive central motive state that precedes consummatory feeding movements in Aplysia is promoted by excitation of the C-PR neuron. Food stimuli activate C-PR as well as a small population of cerebral-buccal interneurons (CBIs). We wished to determine if firing of C-PR produced differential effects on the various CBIs or perhaps affected all the CBIs uniformly as might be expected for a neuron involved in producing a broad undifferentiated arousal state. We found that when C-PR was fired, it produced a wide variety of effects on various CBIs. Firing of C-PR evoked excitatory input to a newly identified CBI (CBI-12) the soma of which is located in the M cluster near the previously identified CBI-2. CBI-12 shares certain properties with CBI-2, including a similar morphology and a capacity to drive rhythmic activity of the buccal-ganglion. Unlike CBI-2, CBI-12 exhibits myomodulin immunoreactivity. Furthermore when C-PR is fired, CBI-12 receives a polysynaptic voltage-dependent slow excitation, whereas, CBI-2 receives relatively little input. C-PR also polysynaptically excites other CBIs including CBI-1 and CBI-8/9 but produces inhibition in CBI-3. In addition, firing of C-PR inhibits plateau potentials in CBI-5/6. The data suggest that activity of C-PR may promote the activity of one subset of cerebral-buccal interneurons, perhaps those involved in ingestive behaviors that occur during the head-up posture. C-PR also inhibits some cerebral-buccal interneurons that may be involved in behaviors in which C-PR activity is not required or may even interfere with other feeding behaviors such as rejection or grazing, that occur with the head down.  (+info)

NMDA-dependent currents in granule cells of the dentate gyrus contribute to induction but not permanence of kindling. (8/5660)

Single-electrode voltage-clamp techniques and bath application of the N-methyl-D-aspartate (NMDA) receptor antagonist 2-amino-5-phosphonovaleric acid (APV) were used to study the time course of seizure-induced alterations in NMDA-dependent synaptic currents in granule cells of the dentate gyrus in hippocampal slices from kindled and normal rats. In agreement with previous studies, granule cells from kindled rats examined within 1 wk after the last of 3 or 30-35 generalized tonic-clonic (class V) seizures demonstrated an increase in the NMDA receptor-dependent component of the perforant path-evoked synaptic current. Within 1 wk of the last kindled seizure, NMDA-dependent charge transfer underlying the perforant path-evoked current was increased by 63-111% at a holding potential of -30 mV. In contrast, the NMDA-dependent component of the perforant-evoked current in granule cells examined at 2.5-3 mo after the last of 3 or 90-120 class V seizures did not differ from age-matched controls. Because the seizure-induced increases in NMDA-dependent synaptic currents declined toward control values during a time course of 2.5-3 mo, increases in NMDA-dependent synaptic transmission cannot account for the permanent susceptibility to evoked and spontaneous seizures induced by kindling. The increase in NMDA receptor-dependent transmission was associated with the induction of kindling but was not responsible for the maintenance of the kindled state. The time course of alterations in NMDA-dependent synaptic current and the dependence of the progression of kindling and kindling-induced mossy fiber sprouting on repeated NMDA receptor activation are consistent with the possibility that the NMDA receptor is part of a transmembrane signaling pathway that induces long-term cellular alterations and circuit remodeling in response to repeated seizures, but is not required for permanent seizure susceptibility in circuitry altered by kindling.  (+info)

Event-related potentials (ERPs) have been used for decades to study perception, cognition, emotion, neurological and psychiatric disorders, and lifespan development. ERPs consist of multiple components and reflect a specific neurocognitive process.
Finally, we checked whether the same ERP component similar to N250 could be detected after the VPP components. Since previous studies have suggested that N170 and VPP components could be generated by the same neural modules, we checked whether we could find the same ERP component as N250 after VPP or not. We measured frontal activity during 250-350 ms after the stimulus onset, at FP1 and FP2 electrode sites where we measured VPP, and we called it post-VPP activity (see Methods section). Post-VPP activity, in contrast to N170, VPP, and N250 brain potentials, was not systematically affected by stimulus visibility and the only prominent difference was among ERP trials in which SOA = 500 ms, relative to the rest of the trials ( Figures 3b and 8). During both face detection and leaf detection tasks, application of a two-factor repeated measures ANOVA (stimulus category (face vs. leaf vs. other objects) × SOA (10 vs. 20 vs. 30 vs. 500 ms)) yielded a significant effects of stimulus visibility ( F , ...
A commentary onCid-Fernandez, S., Lindin, M., & Diaz, F. (2014). Effects of aging and involuntary capture of attention on event-related potentials associated with the processing of and the response to a target stimulus. Frontiers in Human Neuroscience, 8, 745.In a recent study, Cid-Fernandez, Lindin, and Diaz (2014) tested attentional performance in 3 age groups: young (21-29 years old), middle-aged (51-64 years old), and older adults (65-84 years old). The task used in this study involved presenting both visual and auditory cues to the participants, and they were required to pay attention to the visual cues while ignoring the auditory cues (for task details, see Escera, Alho, Winkler, & Naatanen, 1998). Cid-Fernandez et al. (2014) found that there was an increase in distractibility and changes in motor selection in the middle-aged and older groups, compared to the young group. These findings were revealed using electroencephalography analyses which related different cognitive and motor processes to
The present study examined the electrophysiological correlates of intentional forgetting using the item-method directed forgetting paradigm. Participants (N=23) studied a series of words each followed by either a remember cue (TBR) or a forget cue (TBF) and then undertook an old/new recognition memory test for which they were requested to endorse studied items regardless of original remember/forget status. Event-related potentials time locked to the cues were examined as a function of subsequent recognition-memory accuracy. Results showed that TBR and TBF cues elicited Dm or subsequent memory effects that differed in scalp distribution and polarity, suggesting activation of fundamentally different encoding operations for the respective sets of items. Additionally, analyses that examined the processes underlying successful implementations of intentions to forget (i.e., TBF-miss vs. TBR-miss) and intentions to remember (i.e., TBR-hit vs. TBF-hit) revealed that in case of unwanted information a ...
Only ERP data associated with correct responses were included in averages; therefore, 4688 pleasant trials were included (M = 57.21, SD = 3.70), as were 4710 neutral trials (M = 57.62, SD = 3.74) and 4661 unpleasant trials (M = 56.96, SD = 3.46). The EEG was segmented for each trial beginning 200 msec before the pretarget picture and continuing for 1200 msec (i.e., the entire duration of the pretarget picture presentation). In addition, ERP response to correctly identified targets was examined; here, the EEG was segmented 200 msec before the target onset and continuing for 1200 msec. The baseline for all ERPs was the 200 msec before picture onset. Traditional component-scoring techniques were used in an initial examination of the target-locked responses, as the target-locked P300 is a well-defined component (see, e.g., Polich, 2007, for a review). The P300 to targets was scored as the average activity at five sites (CP1, CP2, CPz, Cz, and Pz) between 300 and 600 msec after target onset. Nine ...
the impulse is applied in bursts with positive and negative waves. there are time pauses during impulse application. there are amplitude changes during impulse application. the chemical composition of sweat changes during the application. a combination with dry needling (affecting the change in skin resistance) ...
It was definitely a very negative wave of spiritual energy around me. I can tell when it happens now. I know that it was trying to make me do things wrong. I am not controlled by spirits at all. I cannot be controlled into doing things anymore. But the wave was still there and it…
Comorbidity in ADHD-children: effects of coexisting conduct disorder or tic disorder on event-related brain potentials in an auditory selective-attention ...
Compare cheapest textbook prices for The Oxford Handbook of Event-Related Potential Components (Oxford Library of Psychology), - 9780199328048. Find the lowest prices on SlugBooks
The error-related negativity (ERN) is a negative deflection in the event-related brain potential associated with error processing. A recent theory holds that the ERN is elicited by the impact of a reward prediction error signal carried by the mesencephalic dopamine system on anterior cingulate cortex. The theory predicts that larger ERNs should be elicited by unexpected unfavorable outcomes than by expected unfavorable outcomes. We tested the theory in an experiment in which the frequency of occurrence of reward was varied by condition, reasoning that the system that produces the ERN would come to expect non-reward when rewards were infrequent. Consistent with the theory, we found that larger ERNs were elicited by unexpected absences of reward.
Links between attention and emotion were investigated by obtaining electrophysiological measures of attentional selectivity together with behavioral measures of affective evaluation. Participants were asked to rate faces that had just been presented as targets or distractors in a visual search task. Distractors were rated as less trustworthy than targets. To study the association between the efficiency of selective attention during visual search and subsequent emotional responses, the N2pc component was quantified as a function of evaluative judgments. Evaluation of distractor faces (but not target faces) covaried with selective attention. On trials where distractors were later judged negatively, the N2pc emerged earlier, demonstrating that attention was strongly biased toward target events, and distractors were effectively inhibited. When previous distractors were judged positively, the N2pc was delayed, indicating unfocused attention to the target and less distractor suppression. Variations in
In this study, we used a traditional auditory oddball paradigm, in which participants were required to press a button for the infrequent target stimulus while ignoring the frequent non-target standard stimulus while ignoring the frequent non-target standard stimulus, and focused on P3 component, which is a generic name for a variety of relatively late positive components with a centro-parietal or centro-frontal midline distribution [17, 18]. In addition, we will also investigate the N2, a frontal-central distributed negativity that reflects the stimulus evaluation response including action monitoring, the early target-selection and response preparation [19]. If there were gender effects on cognitive function in patients, it should be reflected by a modulation of the N2 and/or P3 components.. The present study found the P3 component was larger for female than for male participants, for both the patient and control groups. Compared with the control group, there was a decrease in the amplitude of ...
The review of research of event related potentials (ERPs) shows that the most common scientific observation is decrease of the P3b wave both in ADHD and…
Visual object identification is modulated by perceptual experience. In a cross-cultural ERP study we investigated whether cultural expertise determines how buildings that vary in their ranking between high and low according to the Western architectural decorum are perceived. Two groups of German and Chinese participants performed an object classification task in which high- and low-ranking Western buildings had to be discriminated from everyday life objects. ERP results indicate that an early stage of visual object identification (i.e., object model selection) is facilitated for high-ranking buildings for the German participants, only. At a later stage of object identification, in which object knowledge is complemented by information from semantic and episodic long-term memory, no ERP evidence for cultural differences was obtained. These results suggest that the identification of architectural ranking is modulated by culturally specific expertise with Western-style architecture already at an ...
We used event-related potentials (ERPs) to explore the influence of manipulating facial expression on error monitoring in individuals. The participants were 11 undergraduate students who had been diagnosed with minor depression (MinD). We recorded error-related negativity (ERN) as the participants performed a modified flanker task in 3 conditions: Duchenne smile, standard smile, and no smile. Behavioral data results showed that, in both the Duchenne smile and standard smile conditions, error rates were significantly lower than in the no-smile condition. The ERP analysis results indicated that, compared to the no-smile condition, both Duchenne and standard smiling facial expressions decreased ERN amplitude, and ERN amplitudes were smallest for those in the Duchenne smile condition. Our findings suggested that even brief smile manipulation may improve long-term negative mood states of people with MinD ...
Two experiments examined phonological priming effects on reaction times, error rates, and event-related brain potential (ERP) measures in an auditory lexical decision task. In Experiment 1 related prime-target pairs rhymed, and in Experiment 2 they alliterated (i.e., shared the consonantal onset and vowel). Event-related potentials were recorded in a delayed response task. Reaction times and error rates were obtained both for the delayed and an immediate response task. The behavioral data of Experiment 1 provided evidence for phonological facilitation of word, but not of nonword decisions. The brain potentials were more negative to unrelated than to rhyming word-word pairs between 450 and 700 msec after target onset. This negative enhancement was not present for word-nonword pairs. Thus, the ERP results match the behavioral data. The behavioral data of Experiment 2 provided no evidence for phonological Facilitation. However, between 250 and 450 msec after target onset, i.e., considerably earlier ...
The objective of the present study was to delineate brain-electrical correlates of semantic and syntactic integration processes during language comprehension. Twenty-eight subjects were engaged in a lexical decision task. The target item (a legal word or a pseudo word) was always preceded by a prime consisting of a sentence fragment that provided a particular context. With respect to the prime a word target could be either a correct completion, a violation of a semantic selection restriction, or a violation of a syntactic subcategorization rule. An N400-like wave was elicited by both types of deviations. Syntactic anomalies evoked a negative shift predominantly over the anterior scalp with a preponderance over the left hemisphere, while semantic anomalies were accompanied by a much more widespread negativity with the maximum over posterior temporal areas. The amplitude of the semantic vie lation effect was found to be related to the strength of the priming constraints. The topographic difference ...
We used high-density event-related potentials (ERP) in a modified flanker paradigm to study the role of anticipated action consequences in action planning and the role of anticipation in the perception of action consequences. Prior to the experiment, participants were trained to classify target letters in a four-alternative forced-choice task; another letter was presented as an effect following each response. After participants had thus acquired the response-effect contingencies, in the experiment effect letters were presented as flankers to target letters. Effect-compatible flankers were letters that were learned as effects of the correct response to the target; effect-incompatible ones were learned as effects of other responses; neutral flankers were never presented as action effects. To help distinguish early and late effects of flankers on target processing, flankers were presented either simultaneously with the target or after a delay. We found that effect-incompatible flankers resulted in ...
Event-related potentials (ERPs) were recorded during recognition tasks for spoken words alone (items) or for both words and the voice of the speaker (sources). Neither performance nor ERP measures suggested that voice information was retrieved automatically during the item-recognition task. In both …
Memory for the time of events may benefit from reconstructive, location-based, and distance-based processes, but these processes are difficult to dissociate with behavioral methods. Neuropsychological research has emphasized the contribution of prefrontal brain mechanisms to memory for time but has not clearly differentiated location- from distance-based processing. The present experiment recorded event-related brain potentials (ERPs) while subjects completed two different temporal memory tests, designed to emphasize either location- or distance-based processing. The subjects reports of locationbased versus distance-based strategies and the reaction time pattern validated our experimental manipulation. Late (800-1,800 msec) frontal ERP effects were related to location-based processing. The results provide support for a two-process theory of memory for time and suggest that frontal memory mechanisms are specifically related to reconstructive, location-based processing.
Electrophysiological correlates of common-onset visual masking. In common-onset visual masking (COVM) the target and the mask come into view simultaneously. Masking occurs when the mask remains on the screen for longer after deletion of the target. Enns and Di Lollo [Enns, J. T., & Di Lollo, V. (2000). Whats new in visual masking? Trends in Cognitive Sciences, 4(9), 345-352] have argued that this type of masking can be explained by re-entrant visual processing. In the present studies we used high-density event-related brain potentials (HD-ERP) to obtain neural evidence for re-entrant processing in COVM. In two experiments the participants task was to indicate the presence or absence of a vertical bar situated at the lower part of a ring highlighted by the mask. The only difference between the experiments was the duration of the target: 13 and 40 ms for the first and second experiment respectively. Behavioral results were consistent between experiments: COVM was stronger as a joint function of ...
Motor learning can be monitored by observing the development of neural correlates of error processing. Among these neural correlates, the error- and feedback-related negativity (Ne/ERN and FRN) represent error processing mechanisms. While the Ne/ERN is more related to error prediction, the FRN is found after an error is manifested. The questions the current study strives to answer are: What information is needed by the system to make error predictions and how is this represented by the Ne/ERN and FRN in a complex motor task? We reduced the information and increased the difficulty level for the prediction in a semivirtual throwing task and found no Ne/ERN but a large FRN when the action result was finally observed (hitting or missing a target). We assume that uncertainty for error prediction was too high (either due to insufficient information or due to lacking prerequisites for prediction), such that error processing had to be mainly based on feedback. The finding is in line with the ...
TY - JOUR. T1 - Neural mechanisms of global and local processing. T2 - A combined PET and ERP study. AU - Heinze, H. J.. AU - Hinrichs, H.. AU - Scholz, M.. AU - Burchert, W.. AU - Mangun, George R. PY - 1998. Y1 - 1998. N2 - The neural mechanisms of hierarchical stimulus processing were investigated using a combined event-related potentials (ERPs) and positron emission tomography (PET) approach. Healthy subjects were tested under two conditions that involved selective or divided attention between local and global levels of hierarchical letter stimuli in order to determine whether and where hemispheric differences might exist in the processing of local versus global information. When attention was divided between global and local levels, the N2 component of the ERPs (260- to 360-msec latency) elicited by the target stimuli showed asymmetries in amplitude over the two hemispheres. The N2 to local targets was larger over the left hemisphere, but the N2 to global targets tended to be slightly ...
Li, P., Song, X., Wang, J., Zhou, X., Li, J., Lin, F., Hu, Z., Zhang, X., Cui, H., Wang, W., Li, H., Cong, F. and Roberson, D., (2015). Reduced sensitivity to neutral feedback versus negative feedback in subjects with mild depression: Evidence from event-related potentials study. Brain and Cognition. 100, 15-20 Gendron, M., Roberson, D. and Barrett, LF., (2015). Cultural Variation in Emotion Perception Is Real: A Response to Sauter, Eisner, Ekman, and Scott (2015). Psychological Science Hu, Z., Hanley, JR., Zhang, R., Liu, Q. and Roberson, D., (2014). A conflict-based model of color categorical perception: evidence from a priming study. Psychonomic Bulletin & Review. 21 (5), 1214-1223 Chen, Q., Roberson, D., Liang, X., Lei, Y. and Li, H., (2014). Accessing the asymmetrical representations of causal relations and hierarchical relations in semantic memory. Journal of Cognitive Psychology. 26 (5), 559-570 Gendron, M., Roberson, D., van der Vyver, JM. and Barrett, LF., (2014). Cultural Relativity in ...
Studies of electrophysiological indices of performance monitoring, such as the error-related negativity (ERN), posterror positivity (Pe), and N2 components of the event-related potential (ERP),...
You need to be signed in to access email alerts. If you have an account log in with your user name and password. If you dont have an account you can just enter your email address in the email box below ...
Author: Hagoort, Peter; Genre: Talk; Title: Order out of chaos: An explicit account of ERP effects on the interface of lexicon, grammar and semantics
By themselves, there are no specific tests that can determine if a person has MS or is likely to have it in the future. Current diagnosis of definite MS involves both clinical (history and neurological exam) and paraclinical (MRI, Spinal Tap, Evoked potentials) evidence.. The diagnosis evolves from a discussion between the patient and the physician. A careful medical history is taken; symptoms and signs are assessed. Other ailments are ruled out. The diagnosis is highly dependent on the accuracy of the patients medical history and the physicians skill in eliciting and evaluating this information. The diagnosis is sometimes obvious and sometimes very difficult. Even in the hands of experts, the diagnosis is correct only 90 - 95 percent of the time.. The physician will ask about past surgeries, illnesses, allergies, any family neurological disorders including MS, geographic locations where you have lived, if adversely affected by heat, medications taken, history of substance abuse (alcohol, ...
Is Formula Focus the nootropic pill that can unlock your brains potential and give you mental opportunities, and clarity of a lifetime? Check our review!
We carry out a systematic qualitative analysis of the two quadratic schemes of generalized oscillators recently proposed by Quesne [J. Math. Phys. 56, 012903 (2015)]. By performing a local analysis of the governing potentials, we demonstrate that while the first potential admits a pair of equilibrium points one of which is typically a center for both signs of the coupling strength λ, the other points to a centre for λ , 0 but a saddle λ , 0. On the other hand, the second potential reveals only a center for both the signs of λ from a linear stability analysis. We carry out our study by extending Quesnes scheme to include the effects of a linear dissipative term. An important outcome is that we run into a remarkable transition to chaos in the presence of a periodic force term fcosωt. ...
Natural learning happens energetically and experientially. The more we are energized by an experience, the more it is encapsulated in memory.
Women tend to respond to emotional stimuli differently from men. This study aimed at investigating whether neural responses to perceptually
企業資源規劃(Enterprise Resource Planning, ERP)系統是協助公司營運及管理上的主要應用系統,其作用為整合企業內各部門的溝通、資訊的透明化與快速交流,以及五大循環管理的基本控管,進而達到企業成長與獲利之目的。成功地導入ERP系統已經成為目前企業所重視的工作之一,然而ERP系統導入之成功與否,其外在因素包括系統功能適用性、協助導入的顧問公司輔導方式,內在因素則為管理高層支持度、員工學習成熟度與配合度…等,因此,藉由諸多因素的配合,對於企業能否成功導入ERP系統實有關鍵性的影響。現今跨國企業數量日益增多,在不同文化及語言的隔閡下,ERP系統更是能夠發揮即時性、跨語言、跨國別、機密性等各項功能,實為跨國企業管理上之必需,但是如何將同一套的ERP系統導入該企業的不同國家據點,並且對不同國籍員工進行教育訓練
The LM134/LM234/LM334 are 3-terminal adjustable current sources featuring 10,000:1 range in operating current, excellent current regulation and a wide dynamic voltage range of 1V to 40V.
Simultaneous recording of event-related electroencephalographic (EEG) and functional magnetic resonance imaging (fMRI) responses has the potential to provide information on how the human brain reacts to an external stimulus with unique spatial and temporal resolution. However, in most studies combining the two techniques, the acquisition of functional MR images has been interleaved with the recording of evoked potentials. In this study we investigated the feasibility of recording pain-related evoked potentials during continuous and simultaneous collection of blood oxygen level-dependent (BOLD) functional MR images at 3 T. Brain potentials were elicited by selective stimulation of cutaneous Adelta and C nociceptors using brief radiant laser pulses (laser-evoked potentials, LEPs). MR-induced artifacts on EEG data were removed using a novel algorithm. Latencies, amplitudes, and scalp distribution of LEPs recorded during fMRI were not significantly different from those recorded in a control session outside
This study examined the ability of reaction time (RT) and Event-Related Potentials (ERP) to detect malingered neurocognitive deficit (MNCD)in two new tasks compared to the TOMM (N = 47). Honest (HON), malingering (MAL), and traumatic brain injury (TBI) groups were compared on accuracy, RT and ERP measures. Overall, the Test of Memory Malingering (TOMM) accuracy was the most effective at classifying groups (hit rate = 100%). Several non-TOMM accuracy variables and RT variables reached hit rates in the range of 71%-88%. The TOMM RT variable had an unlimited time for participants to respond and was the most successful RT variable compared to the Old/New and Repetition Priming tasks that had a short time limit for participants to respond (approximately 1.5 seconds). The classic old/new effect RT pattern was evident for both the HON and TBI groups with significantly faster RTs for old items compared to new items. A logistic regression was employed to see if a RT and/or ERP variable added any unique
TY - JOUR. T1 - Peripheral GABA(A) receptors. T2 - Evidence for peripheral primary afferent depolarization. AU - Carlton, S. M.. AU - Zhou, S.. AU - Coggeshall, R. E.. N1 - Funding Information: The authors would like to thank Brenda Kenworthy for her excellent secretarial assistance in the preparation of this manuscript, and Dr A. L. DeBlas for kindly providing a monoclonal antibody directed against the β 2 /β 3 subunits. This study was supported by NIH grants NS11255 (SMC and REC), NS27910 (SMC) and NS10161 (REC). PY - 1999/7. Y1 - 1999/7. N2 - We propose that the primary afferent depolarization that follows GABA(A) receptor activation in the spinal cord also occurs in the periphery. As evidence, the present study localizes β2/β3 and α1 subunits of the GABA(A) receptor on 10-14% of the unmyelinated primary afferents axons in the glabrous skin of the cat paw. Behavioral studies demonstrate that local peripheral injection of the GABA(A) agonist muscimol at a low concentration (2.0μM) ...
Auditory novelty detection has been associated with different cognitive processes. Bekinschtein et al. (2009) developed an experimental paradigm to dissociate these processes, using local and global novelty, which were associated, respectively, with automatic versus strategic perceptual processing. They have mostly been studied using event-related potentials (ERPs), but local spiking activity as indexed by gamma (60-120 Hz) power and interactions between brain regions as indexed by modulations in beta-band (13-25 Hz) power and functional connectivity have not been explored. We thus recorded 9 epileptic patients with intracranial electrodes to compare the precise dynamics of the responses to local and global novelty. Local novelty triggered an early response observed as an intracranial mismatch negativity (MMN) contemporary with a strong power increase in the gamma band and an increase in connectivity in the beta band. Importantly, all these responses were strictly confined to the temporal ...
This study examines the event- related brain potential of 25 Mexican monolingual Spanish-speakers when reading Spanish sentences with single entity anaphora or complex anaphora. Complex anaphora is an expression that refer to propositions, states, facts or events while, a single entity anaphora is an expression that refers back to a concrete object. Here we compare the cognitive cost in processing a single entity anaphora [éstafeminine; La renuncia ] from a complex anaphora [estoneuter; La renuncia fue aceptada ]. Ésta elicited a (...) larger positive peak at 200 ms, and esto elicited a larger frontal negativity around 400 ms. The positivity resembles the P200 component, and its amplitude is thought to represent an interaction between predictive qualities in sentence processing. Unlike parietal negativities, frontal negativities are thought to represent the ease by which pronouns are linked with its antecedent, and how easy the information is recovered from short-term memory. Thus, the complex ...
BACKGROUND:Individuals with schizophrenia have heterogeneous impairments of the auditory processing system that likely mediate differences in the cognitive gains induced by auditory training (AT). Mismatch negativity (MMN) is an event-related potential component reflecting auditory echoic memory, and its amplitude reduction in schizophrenia has been linked to cognitive deficits. Therefore, MMN may predict response to AT and identify individuals with schizophrenia who have the most to gain from AT. Furthermore, to the extent that AT strengthens auditory deviance processing, MMN may also serve as a readout of the underlying changes in the auditory system induced by AT. METHODS:Fifty-six individuals early in the course of a schizophrenia-spectrum illness (ESZ) were randomly assigned to 40 h of AT or Computer Games (CG). Cognitive assessments and EEG recordings during a multi-deviant MMN paradigm were obtained before and after AT and CG. Changes in these measures were compared between the treatment ...
The current study investigated the neurophysiological underpinnings of emotional maintenance in schizophrenia (SCZ) and whether aberrant neural responses predicted deficits in affective decision making and real-world motivated behavior. Event-related potentials (ERPs) were recorded from 27 SCZ outpatients and 23 healthy controls (CN) during an emotional maintenance task in which participants were presented an initial image for 3 seconds and then required to maintain a mental representation of the intensity that image over a delay period of varying lengths and determine whether the initial image was more or less intense than the second image. The Late Positive Potential (LPP) was used as a neurophysiological marker of emotional maintenance during the delay period. SCZ showed normal in-the-moment emotion experience to positive stimuli; however, SCZ rated negative and neutral pictures as more intense than CN. SCZ also displayed deficits in emotional maintenance accuracy. Furthermore, ERP data ...
Tinnitus related distress corresponds to different degrees of attention paid to the tinnitus. Shifting attention to a signal other than the tinnitus is therefore particularly difficult for patients wi
This study investigated neural processing interactions during Stroop interference by varying the temporal separation of relevant and irrelevant features of congruent, neutral, and incongruent colored-bar/color-word stimulus components. High-density event-related potentials (ERPs) and behavioral performance were measured as participants reported the bar color as quickly as possible, while ignoring the color words. The task-irrelevant color words could appear at 1 of 5 stimulus onset asynchronies (SOAs) relative to the task-relevant bar-color occurrence: -200 or -100 ms before, +100 or +200 ms after, or simultaneously. Incongruent relative to congruent presentations elicited slower reaction times and higher error rates (with neutral in between), and ERP difference waves containing both an early, negative-polarity, central-parietal deflection, and a later, more left-sided, positive-polarity component. These congruency-related differences interacted with SOA, showing the greatest behavioral and ...
Sarica Y.; Karacan I., 1988: Electrophysiological correlates of sensory innervation of the vesico urethral junction and urethra in man
Humans, and other animals, are able to easily learn the durations of events and the temporal relationships among them in spite of the absence of a dedicated sensory organ for time. This chapter summarizes the investigation of timing and time perception using scalp-recorded electroencephalography (EE …
The reliability of cue-based conscious expectation improves with increasing predictive value of the cue. Here we report that expectation strengthens delta-band phase-entrainment to and speeds up the detection of relevant stimulus events. Our results further reveal that target events expected with high confidence are likely to 1) coincide with the negative-going phase of the frontocentral delta oscillations, 2) elicit short-latency and high-amplitude delta-peak (P300) ERP responses, and 3) are quickly detected consciously. Therefore, we suggest that the entrainment of cortical delta oscillations to expected stimulus onsets plays an important role in mediating the effects of anticipation on target detection in humans. Our study extends the recent finding that low-frequency oscillations entrain to rhythmic stimuli in macaques (Lakatos et al., 2008) to humans. Moreover, our results go beyond the previous understanding about passive phase-entrainment, providing evidence that phase concentration-and ...
We tested 14-month-olds and adults in an event-related potentials (ERPs) study in which pictures of familiar objects generated expectations about upcoming word forms. Expected word forms labelled the picture (word condition), while unexpected word forms mismatched by either a small deviation in word medial vowel height (mispronunciation condition) or a large deviation from the onset of the first speech segment (pseudoword condition). Both infants and adults showed sensitivity to both types of unexpected word form. Adults showed a chain of discrete effects: positivity over the N 1 wave, negativity over the P 2 wave (PMN effect) and negativity over the N 2 wave (N400 effect). Infants showed a similar pattern, including a robust effect similar to the adult P 2 effect. These observations were underpinned by a novel visualisation method which shows the dynamics of the ERP within bands of the scalp over time. The results demonstrate shared processing mechanisms across development, as even subtle
Schankin, A.; Wascher, E.: What do we and our brain see when we do not expect a stimulus? Results from a lateralized event-related potential study (N2PC). 46th Annual Meeting of the Society for Psychophysiological Research (SPR), Vancouver, BS, Canada (2006 ...
The optimal performance of an action depends to a great extend on the ability of a person to prepare in advance the appropriate kinetic and kinematic parameters at a specific point in time in order to meet the demands of a given situation and to foresee its consequences to the surrounding environment. In the research presented in this thesis, I employed high-density electroencephalography in order to study the neural processes underlying preparation for action. A typical way for studying preparation for action in neuroscience is to divide it in temporal preparation (when to respond) and event preparation (what response to make). In Chapter 2, we identified electrophysiological signs of implicit temporal preparation in a task where such preparation was not essential for the performance of the task. Electrophysiological traces of implicit timing were found in lateral premotor, parietal as well as occipital cortices. In Chapter 3, explicit temporal preparation was assessed by comparing anticipatory ...
Boutsen, L., Kumar, S., & Humphreys, G. W. (2009). Automatic action activation in motor cortex is modulated by object affordances and hand grip: Evidence from event-related brain potentials ...
Examples of current source density (CSD) waveforms (A) and CSD maps (B). EEG data (SEPs) shown in Fig. 2 were subjected to CSD transformation. Isolatency dotte
This is just a follow up on some threads that fat maybe a trigger to rosacea, in at least one forum member. Personally, I have never really heard this association, so am somewhat skeptical, though open to the possibility. The only potential evidence i know to this is that red meat has been linked to worsening rosacea, compared to fish or veggies. This however may not be due to the fat.... Clearly fat is important for our bodies to function normally, so it would not seem logical to totally
You may want to look into the LFP modelling work of Alain Destexhes lab: and Gaute Einevolls lab: . They have both been producing some very interesting work on the origin and features of local field potentials. If you are using simplified point neuron models, it may be worth looking at Alberto Mazzonis recent papers on LFPs insimplified models: ... ile&id=385 ...
Figure 6. Spikes are embedded in unique synapsembles and spatially distributed LFP - The origin of extracellular fields and currents - EEG, ECoG, LFP and spikes
Unscramble amplitude, Unscramble letters amplitude, Point value for amplitude, Word Decoder for amplitude, Word generator using the letters amplitude, Word Solver amplitude, Possible Scrabble words with amplitude, Anagram of amplitude
Buy Xylem Flojet Diaphragm Electric Operated Positive Displacement Pump, 15.1L/min, 4.1 bar, 12 V R3521139A. Browse our latest Positive Displacement Pumps offers. Free Next Day Delivery available.
I was excited to see that local field potentials were added! Unfortunately I was having trouble getting them to work, likely due to my own ignorance. I have the same code as in my previous post about plotRatePSD, where I create a network with the following populations ...
Both are auditory evoked potentials. Both use acoustic stimuli delivered through inserts (preferably). Both can be used to ... 249-252, Auditory-evoked potential studies of cortical maturation in normal hearing and implanted children: Correlations with ... Long and Allen were the first to report the abnormal brainstem auditory evoked potentials (BAEPs) in an alcoholic woman who ... Auditory steady-state response is an auditory evoked potential, elicited with modulated tones that can be used to predict ...
Näätänen, R., Gaillard, A. W., & Mäntysalo, S. (1978). Early selective-attention effect on evoked potential reinterpreted. Acta ... Selective attention and evoked potentials. Annales Academiae Scientiarum Fennicae: Dissertationes Humanum Litterarum B-151(1), ... Early selective-attention effect on evoked potential reinterpreted. (1978, Acta Psychologica, 42(4), 313-29) The role of ... MMN has been established as a scalp-negative component of the event-related potential or ERPs, as derived from recordings made ...
Ladich, F., & Fay, R. R. (2013). Auditory evoked potential audiometry in fish. Reviews in fish biology and fisheries, 23(3), ... High levels of underwater sound create a potential hazard to marine and amphibious animals. The effects of exposure to ... High levels of underwater sound create a potential hazard to human divers. Guidelines for exposure of human divers to ...
using evoked potentials and electrical stimulation. Experiments involving ablation of the second somatosensory cortex in ... "Localization in somatic sensory and motor areas of human cerebral cortex as determined by direct recording of evoked potentials ... In 1954, Penfield and Jasper evoked somatosensory sensations in human patients during neurosurgery by electrically stimulating ...
Derivatives of the EEG technique include evoked potentials (EP), which involves averaging the EEG activity time-locked to the ... sensory event-related potentials, (3) brain stem potentials, and (4) cognitive event-related potentials. The performance of the ... Epstein, Charles M. (1983). Introduction to EEG and evoked potentials. J. B. Lippincott Co. ISBN 978-0-397-50598-2.[page needed ... EEG recordings do not directly capture axonal action potentials. An action potential can be accurately represented as a current ...
Evoked potentials. Negativity. Bereitschaftspotential. ELAN. N100. Visual N1. N170. N200. N2pc. N400. Contingent negative ... ERPLAB, for deriving measures from average event-related potentials;. *NBT, a toolbox for the computation and integration of ...
Triggs WJ, Ghacibeh G, Springer U, Bowers D (2005). "Lateralized asymmetry of facial motor evoked potentials". Neurology. 65 (4 ... which often works by examining the motor cortex and recording the motor stroked potentials. At high stimulation strengths, this ... or myofeedback could provide patients who suffer from central facial palsy the ability to create myo-electrical potentials that ...
Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section. 85 (2): 116-23. doi:10.1016/0168-5597(92)90077-O ... The physiological phenomena of action potentials are possible because voltage-gated ion channels allow the resting potential ... Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section. 108 (1): 1-16. doi:10.1016/S0168-5597(97)00096-8 ... These action potentials are used to facilitate inter-cellular communication and activate intracellular processes. ...
Strain, G. M. (1992). "Brainstem auditory evoked potentials in veterinary medicine". British Veterinary Journal. 148 (4): 275-8 ... Strain, G. M. (1993). "Deafness assessment services by means of the brainstem auditory-evoked response". Journal of Veterinary ...
Bispectral index Evoked potentials Anier, A (2012). "Relationship between approximate entropy and visual inspection of ...
Chertoff, ME; Hecox, KE (March 1990). "Auditory nonlinearities measured with auditory-evoked potentials". The Journal of the ... Burkard, R., Don, M., & Eggermont, J. J. Auditory evoked potentials: Basic principles and clinical application. Philadelphia: ... In 1930, Wever and Bray discovered a potential called the "Wever-Bray effect". They originally believed that the potential ... is an evoked potential generated by periodic or nearly-periodic auditory stimuli. Part of the auditory brainstem response (ABR ...
EMG and evoked potentials, and electrodiagnostic physician focuses mainly on nerve conduction studies, needle EMG, and evoked ... Evoked potentials: Diagnostic test evaluating specific tracts of the central and peripheral nervous system. May include visual ... Physiologists perform the majority of EEGs, evoked potentials and a portion of the nerve conduction studies. They are then ... Many tests involve carrying out an EMG to read the evoked potential recordings. Nerve conduction recordings are extremely ...
"Quantitative EEG and Cognitive Evoked Potentials in Anemia". Clinical Neurophysiology. 38 (2): 137-143. doi:10.1016/j.neucli. ...
Topographic Mapping of Eeg and Evoked Potentials. Konrad Maurer (1989). Topographic Brain Mapping of Eeg and Evoked Potentials ...
"A Study of Evoked Potentials From Ear-EEG". IEEE Transactions on Biomedical Engineering. 60 (10): 2824-2830. doi:10.1109/TBME. ... "Developing an online steady-state visual evoked potential-based brain-computer interface system using EarEEG". 2015 37th Annual ... The ear-EEG forward models enable prediction of the potentials in the ear for a specific neural phenomenon, and can be used to ... Other potential use cases which are known to have been explored are driver drowsiness detection, BCI and biometric ...
Carrubba (et al.), 2008 1 Gauss = 1000 mG Evoked potentials detected. Bell (et al.) 2007 .78 Gauss = 780 mG Field_induced ... "Occupational hazard? Working in MRI and the potential impact of EU PAD (EMF)" (PDF). Archived from the original (PDF) on 1 ... AR Liboff has proposed that "incorporating EM field-mediated communication into models of brain function has the potential to ... There is no question that incorporating EM field-mediated communication into models of brain function has the potential to ...
At this time he also worked with Timothy Bates on evoked potential, reaction time, and inspection time measures of ability. ... the assessment of emotional intelligence and evoked potentials; and the neuropsychological effects of electromagnetic emissions ...
... of evoked potential; Buchsbaum, Haier, & Johnson), reactivity (Strelau), avoidance temperament (Elliot & Thrash), and ...
The N100 is a slow-developing evoked potential. From one to four years of age, a positive evoked potential, P100, is the ... Older children start to develop a negative evoked potential at 200 ms that dominates evoked potentials until adolescence; this ... "the amplitude of the self-evoked response actually exceeded that of the machine-evoked potential". Being warned about an ... "Neuromagnetic source localization of auditory evoked fields and intracerebral evoked potentials: A comparison of data in the ...
Somatosensory evoked potentials in patients with primary premature ejaculation. J Urol. 1997;158(2):451-7. doi:10.1016/S0022- ...
... presence during sensory evoked potentials and somatosensory evoked magnetic field after median nerve stimulation. These bursts ... Murakami, Takenobu; Sakuma, Kenji; Nakashima, Kenji (2008-12-01). "Somatosensory evoked potentials and high-frequency ... Somatosensory evoked HFO amplitude changes may be potentially used as biomarker for neurologic disorders, which can help in ... High amplitude HFOs (80-200 Hz) bursts correlates with psychotic-like state evoked with PCP or subanesthetic dose of ketamine ( ...
1988). "Intraoperative monitoring of evoked potentials with a spiral scalp electrode. Technical note". Neurosurgery Service, ... "Device and method for monitoring evoked potentials and electroencephalograms". Retrieved 7 September 2013. CS1 maint: ... Following development of the prototype device at Stanford University, Doty was so convinced of its potential to change the ...
When examining evoked potentials to these stimuli (i.e., ERPs), Chapman and Bragdon found that both the numbers and the flashes ... Sutton S, Tueting P, Zubin J, John ER (March 1967). "Information delivery and the sensory evoked potential". Science. 155 (3768 ... Sutton S, Braren M, Zubin J, John ER (November 1965). "Evoked-potential correlates of stimulus uncertainty". Science. 150 (3700 ... P600 Somatosensory evoked potential Visual N1 Levi-Aharoni H, Shriki O, Tishby N (February 2020). "Surprise response as a probe ...
"Near ultraviolet radiation elicits visual evoked potentials in children". Clinical Neurophysiology. 110 (3): 379-383. doi: ...
"CCHS Family Network". Long, K. J.; Allen, N. (October 1984). "Abnormal brain-stem auditory evoked potentials following Ondine's ... Other potential treatments for CHS include oxygen therapy and medicine for stimulating the respiratory system. Currently, ... Long and Allen (1984) were the first to report the abnormal brainstem auditory evoked responses in an alcoholic woman who ...
Sutton, S., Braren, M., & Zubin, J. (1965). Evoked-potential correlates of stimulus uncertainty. Science, 150, 1187-1188. ... P600 Somatosensory evoked potential Visual N1 Folstein, J. R., & Van Petten, C. (2008). Influence of cognitive control and ... The N200, or N2, is an event-related potential (ERP) component. An ERP can be monitored using a non-invasive ... Patel, S. H., & Azzam, P. N. (2005). Characterization of N200 and P300: Selected studies of the event related potential. ...
Electrooculography Visual evoked potential Perlman, Ido. "The Electroretinogram: ERG by Ido Perlman". Webvision at University ... The ERG is composed of electrical potentials contributed by different cell types within the retina, and the stimulus conditions ... The pattern ERG (PERG), evoked by an alternating checkerboard stimulus, primarily reflects activity of retinal ganglion cells. ...
Evoked potential audiometry *N1-P2 cortical audio evoked potential (CAEP) audiometry. *ABR is a neurologic tests of auditory ... Vestibular evoked myogenic potential (VEMP) test, a variant of ABR that tests the integrity of the saccule ... Transient evoked otoacoustic emissions (TEOAE) audiometry. *Sustained frequency otoacoustic emissions (SFOAE) audionetry - At ... Electronystagmography (ENG) uses skin electrodes and an electronic recording device to measure nystagmus evoked by procedures ...
N400 Event-related potential Evoked field Evoked potential International Society for Clinical Electrophysiology of Vision Late ... The visual N1 is a visual evoked potential, a type of event-related electrical potential (ERP), that is produced in the brain ... The N1 is elicited by visual stimuli, and is part of the visual evoked potential - a series of voltage deflections observed in ... Eason, R.G., Harter, M.R., & White, T.C. (1969). Effects of attention and arousal on visually evoked cortical potentials and ...
Bullock, Theodore H. ; Daryl P. Domning; and Robin C. Best (1980). "Evoked Brain Potentials Demonstrate Hearing in a Manatee ( ...
This form of locomotion allows these octopuses to move quickly away from a potential predator without being recognised.[76] A ... "Why Mark Zuckerberg Octopus Cartoon Evokes 'Nazi Propaganda,' German Paper Apologizes". iMediaEthics. Retrieved 31 May 2017 ...
... stimulus evoked responses. Subspecialties include electroencephalography, electromyography, evoked potential, nerve conduction ... It was under the Byzantines with physicians such of Theophilus Protospatharius that they realized the potential in uroscopy to ... and potential surgical candidates on the hospital wards. Surgery has many sub-specialties, including general surgery, ... "Traditional medicine: growing needs and potential". World Health Organization.. *^ El Dib RP, Atallah AN, Andriolo RB (August ...
... enhanced both stimulus-evoked inhibition and the effects of exogenously applied muscimol which is a GABAA selective agonist.[5] ... "Beyond classical benzodiazepines: novel therapeutic potential of GABAA receptor subtypes". Nature Reviews. Drug Discovery. 10 ...
Libet found that the unconscious brain activity of the readiness potential leading up to subjects' movements began ... or that the free will evoked to make any given choice is really an illusion and the choice had been made all along, oblivious ... since the readiness potential does not invariably lead to an action. In Freedom Evolves, Daniel Dennett argues that a no-free- ... Readiness-Potential)". Brain. 106 (3): 623-42. doi:10.1093/brain/106.3.623. PMID 6640273.. ...
Gex-Fabry, M; Balant-Gorgia, AE; Balant, LP (February 1995). "Potential of concentration monitoring data for a short half-life ... "Comparison of the effects of moclobemide and selegiline on tyramine-evoked mydriasis in man". Br J Clin Pharmacol. 45 (6): 551 ... Sieradzan K, Channon S, Ramponi C, Stern GM, Lees AJ, Youdim MB (August 1995). "The therapeutic potential of moclobemide, a ... The following are the potential adverse effects and their respective incidences:[13][77] ...
... , like many forms of therapy, has the potential to be a highly culturally sensitive one. Empathy in general is an ... Jones, J. D. (2005). A comparison of songwriting and lyric analysis techniques to evoke emotional change in a single session ... It's the added complexity to cultural empathy that comes from adding music that provides both the greater risk and potential to ... Corresponding with the attitudes of humanistic psychology, the developmental potential of the child, as in the acknowledgement ...
Mobile media and new technologies have the potential to change the threshold for collective action due to swarm intelligence ( ... and evoke opinions.[31] Such systems have been shown to significantly amplify human intelligence, resulting in a string of high ...
This raises the resting potential of the endings, thereby increasing the probability of action potential firing, thus ... The reflexly evoked activity in the alpha motoneurons is then transmitted via their efferent axons to the extrafusal fibers of ... length and velocity and transmit this activity to the spinal cord in the form of changes in the rate of action potentials. ...
... but a smile will only be evoked through touch between parent and baby. This primary form of communication is greatly delayed ... accompanied by concerted efforts to ensure the accessibility of information technology to all potential users, including the ... that people be examined by someone specializing in low vision care prior to other rehabilitation training to rule out potential ...
... that evoke or replicate substantial aspects of the real world in a fully interactive fashion".[18] This definition deliberately ... "simulation's ability to address skilful device handling as well as purposive aspects of technology provides a potential for ... from the field medics all the way up to the hospitals located in key military bases receive proper training for potential ...
... understood the importance of her public persona and was able to simultaneously evoke both esteem and affection in ... wishing to prevent potential future wars with Austria, returned them to Maria Theresa.[68] ...
The immunity is not affected by the witness' domination of a corporate defendant already in action, or the witness' potential ... Political songs of the day evoked the problem: "At Westminster halle (Legis sunt valde scientes); Nevertheless for hem alle ( ...
Two types of gamma activity were found by Snyder & Large: induced gamma activity, and evoked gamma activity. Evoked gamma ... The hair cells in the cochlea release neurotransmitter as a result, causing action potentials down the auditory nerve. The ... In a follow-up study, Koelsch, Schroger, and Gunter (2002) investigated whether ERAN and N5 could be evoked preattentively in ... Arlinger, S; Elberling, C; Bak, C; Kofoed, B; Lebech, J; Saermark, K (1982). "Cortical magnetic fields evoked by frequency ...
Jainism views every soul as worthy of respect because it has the potential to become Siddha (God in Jainism). Because all ... The empathy-altruism hypothesis basically states that psychological altruism does exist and is evoked by the empathic desire to ... This may signal to others that the altruist is a valuable potential partner. It may also be a signal of interactive and ... Brown, S. L.; Brown, R.; House, J. S.; Smith, D. M. (2008). "Coping with spousal loss: Potential buffering effects of self- ...
Robinson, LR; Micklesen, PJ; Tirschwell, DL; Lew, HL (Mar 2003). "Predictive value of somatosensory evoked potentials for ...
If the generator potential reaches threshold, a volley of action potentials (nerve impulses) are triggered at the first node of ... Torebjörk HE, Ochoa JL (December 1980). "Specific sensations evoked by activity in single identified sensory units in man". ... When a mechanoreceptor receives a stimulus, it begins to fire impulses or action potentials at an elevated frequency (the ... Deforming the corpuscle creates a generator potential in the sensory neuron arising within it. This is a graded response: the ...
Temporal theories offer an alternative that appeals to the temporal structure of action potentials, mostly the phase-locking ... an advantage of this definition is that it provides a clear procedure for testing whether or not a stimulus evokes a pitch, and ... since neurons have an upper limit on how fast they can phase-lock their action potentials.[6] However, a purely place-based ... but the processing seems to be based on an autocorrelation of action potentials in the auditory nerve.[17] However, it has long ...
In addition, according to the American Heart Association, some home devices have a remote potential to cause interference by ... the human heart in asystole caused a ventricular contraction and that a heart rhythm of 60-70 beats per minute could be evoked ... carried a potential hazard of electrocution of the patient and inducing ventricular fibrillation. ...
"Interrenal corticosteroid production: Potential regulation by the immune system in the salmonid." pp 480-486. In: A. Epple (ed ... "Multiple acute disturbances evoke cumulative physiological stress responses in juvenile chinook salmon." Trans. Am. Fish. Soc. ...
They are called somatosensory evoked potentials when they are elicited by sensory (vs. cognitive or motor) event stimuli. The ... Event-related potential positive and negative 10µ to 100µ Volts (µ is millionths) responses, measured via noninvasive ... in spite of the tight relationship between local field potentials (LFP) and blood oxygenation level dependent (BOLD) signals ...
A relevant study deals with the real concern of participants, evokes "grab" (captures the attention) and is not only of ... grounded theories are often fresh and new and have the potential for innovative discoveries in science and other areas. ...
Human enhancement Intelligence amplification Isochronic tones Neural oscillations Evoked potential Event-related potential ... designed to evoke certain effects. Hemi-Sync has been used for many purposes, including relaxation and sleep induction, ...
Those are the potential extremes. What seems to be in play here is the degree to which uppercase/lowercase style should be hard ... but ensis has the danger of evoking poetry, or at least sounding a little odd. Maybe the situation there is like sword and ... I was looking through your recent contributions, hoping to spot a potential pagina mensis, and this caught my eye. You're 100% ... It seems to me there's a large potential overlap between existing categories on the pattern Categoria:Aegypti scripta and the ...
At high concentrations, it had no effect on spontaneous or potassium evoked amino acid release.[45] ... Ketter TA, Manji HK, Post RM (October 2003). "Potential mechanisms of action of lamotrigine in the treatment of bipolar ... Braga MF, Aroniadou-Anderjaska V, Post RM, Li H (March 2002). "Lamotrigine reduces spontaneous and evoked GABAA receptor- ... which is evoked by the sodium-channel activator veratrine, and was less effective in the inhibition of acetylcholine or GABA ...
A measure of prestige could be the amount of deference shown to a potential cultural model by other individuals. A "skill bias ... "evoked culture"-situations in which different evolved programs are activated in different places, in response to cues in the ... Herb Gintis has named DIT one of the two major conceptual theories with potential for unifying the behavioral sciences, ... One difference is that memetics' focus is on the selection potential of discrete replicators (memes), where DIT allows for ...
Evoked potential. *Bereitschaftspotential. *P300. *Auditory evoked potential. *Somatosensory evoked potentials. *Visual evoked ... in intensity of the evoked OAE [20]. All results were however reported only as group averages, and no attempt was made to ... transient evoked otoacoustic emission (TEOAE) and distortion product otoacoustic emission (DPOAE). In a recent US patent issued ...
"A large number of studies have been performed over the last two decades to assess whether mobile phones pose a potential health ... public information remains a challenge as various health consequences are evoked in the literature and by the media, putting ...
Canaries are alternately known as cookies, which is meant to evoke the image of a "broken cookie" when the value is corrupted. ... then the bug is a potential security vulnerability that allows an attacker to inject executable code into the running program ...
Steady state visually evoked potential. Auditory evoked potential[edit]. Auditory evoked potentials (AEP) can be used to trace ... An evoked potential or evoked response is an electrical potential recorded from the nervous system of a human or other animal ... Steady-state evoked potential[edit]. An evoked potential is the electrical response of the brain to a sensory stimulus. Regan ... 1 Sensory evoked potentials *1.1 Steady-state evoked potential *1.1.1 The "simultaneous stimulation" technique ...
Indeed, short-latency brain-stem auditory-evoked potentials, as... ... many clinical EEG laboratories have added average evoked potential studies to their routine procedures. ... short-latency brain-stem auditory-evoked potentials, as well as short- and intermediate-latency cortical-evoked potentials, ... This being the case, there is need for the EEG technician to become familiar with evoked-potential methods and to add a variety ...
Media in category "Evoked potentials". The following 40 files are in this category, out of 40 total. ... Steady-State-Motion-Visual-Evoked-Potential-(SSMVEP)-Based-on-Equal-Luminance-Colored-Enhancement-pone.0169642.s003.ogv 5.0 s, ... Oxytocin-evokes-a-pulsatile-PGE2-release-from-ileum-mucosa-and-is-required-for-repair-of-intestinal-srep11731-s2.ogv 44 s, 720 ... Retrieved from "" ...
Short-latency somatosensory evoked potentials: interpretation. Chiappa KH, ed. Evoked Potentials in Clinical Medicine. 2nd ed. ... General Principles of Somatosensory Evoked Potentials Q&A How are diagnostic somatosensory evoked potentials (SEPs) interpreted ... How are diagnostic somatosensory evoked potentials (SEPs) interpreted?) and How are diagnostic somatosensory evoked potentials ... Use of the stationary lumbar potential increases the diagnostic yield of posterior tibial nerve somatosensory evoked potentials ...
... de Weerd Evoked potentials are the electrical voltage fluctuations which can be recorded from parts of the nervous system in ... gustatory and olfactory evoked potentials. At the present time, the former three types of evoked potentials are the ones that ... J.P.C. de Weerd Evoked potentials are the electrical voltage fluctuations which can be recorded from parts of the nervous ... One may distinguish between evoked potentials from the peripheral and the central nervous system. For the latter type a further ...
Somatosensory evoked potentials: clinical uses. AAEM Somatosensory Evoked Potentials Subcommittee. American Association of ... Chiappa K. Short-latency somatosensory evoked potentials: interpretation. Evoked Potentials in Clinical Medicine. New York: ... Somatosensory evoked potentials, sensory nerve potentials and sensory nerve conduction in hereditary motor and sensory ... Clinical Applications of Somatosensory Evoked Potentials Q&A What is the clinical interpretation of somatosensory evoked ...
Medical definition of evoked potential: an electrical response especially in the cerebral cortex as recorded following ... Share evoked potential Post the Definition of evoked potential to Facebook Share the Definition of evoked potential on Twitter ... Comments on evoked potential What made you want to look up evoked potential? Please tell us where you read or heard it ( ... Dictionary Entries near evoked potential. Evista evocation evocator evoked potential evolution evolutionist evolve ...
Somatosensory evoked potential (SEP or SSEP) is the electrical activity of the brain that results from the stimulation of touch ... An N8 potential can be detected over the posterior tibial nerve at the knee. An N22 potential can be detected over the upper ... However, the most recent advances were brought about by multichannel recordings of evoked potentials coupled with source ... Williams and Wilkins.[page needed] Nuwer, Marc R (February 1998). "Fundamentals of evoked potentials and common clinical ...
I had abnormal sensory evoked potential testing: when my left tibial nerve wa... ... heres more info about evoked potentials ... heres more info about evoked potentials ... Abnormal Evoked Potential Testing? ashleyPT Ive been searching articles and asking doctors without much luck so now I will ask ...
Evoked responses indicate the brains response to specific stimuli. Three kinds of these are used by neurologists and ... Three kinds of evoked potential procedures are used by neurologists and specialists:. *Visual evoked potentials test the visual ... Somatosensory evoked potentials test the pathways between the peripheral nerves through the spine to the brain by stimulating ... Auditory evoked potentials test the auditory pathways between the ear and the brain by presenting auditory clicks ...
Neonatal Visual Evoked Potentials in Infants Born to Mothers Prescribed Methadone. Laura McGlone, Ruth Hamilton, Daphne L. ... Visual evoked potential in the newborn: does it have predictive value? Semin Fetal Neonatal Med. 2006;11(6):459-463pmid: ... Visual evoked potentials in infants exposed to methadone in utero. Arch Dis Child. 2008;93(9):784-786pmid:18305073. ... Neonatal Visual Evoked Potentials in Infants Born to Mothers Prescribed Methadone Message Subject (Your Name) has sent you a ...
11) Late Auditory Evoked Potentials: Changing the Things Which Are. 12) Endogenous Auditory Evoked Potentials: Attention Must ... 1) Introduction: Past, Present, and Potential. 2) Recording Evoked Potentials: Means to an End. 3) Frequency Domain: Music of ... Human Auditory Evoked Potentials. Terence Picton. Details:. 648 pages, Illustrated (B/W), Hardcover, 7 x 10" ISBN13:. 978-1- ... The book covers most of the aspects in which the study of auditory evoked potentials has contributed to expand our ...
First, an effect on early sensory processing was found for the heartbeat-evoked potential (HEP), a marker of cardiac ... First, increased heartbeat-evoked neural activity before stimulation is followed by decreased somatosensory detection. This ... which is accompanied by changes in early and late somatosensory-evoked responses. Second, stimulus timing during the cardiac ... cycle affects sensitivity but not criterion for somatosensory stimuli, which is reflected only in late somatosensory-evoked ...
You will explore topics such as nerve conduction studies and evoked potential measurements. ... This course is for you if you are looking to develop your knowledge in nerve conduction studies and evoked potentials in ... Nerve Conduction and Evoked Potentials - standalone module. This course is for you if you are looking to develop your knowledge ... This module will introduce you to the underlying theory of carrying out nerve conduction studies, evoked potentials and your ...
Event-Related Potentials and Evoked Potentials. Edited by: Phakkharawat Sittiprapaporn. ISBN 978-953-51-3639-2, eISBN 978-953- ... Event-Related Potentials and Evoked Potentials. Edited by Phakkharawat Sittiprapaporn. Mae Fah Luang University, Thailand ... This edited volume Event-Related Potentials and Evoked Potentials is a collection of reviewed and relevant research chapters, ... This edited volume Event-Related Potentials and Evoked Potentials is a collection of reviewed and relevant research chapters, ...
Can vestibular-evoked myogenic potentials help differentiate Ménière disease from vestibular migraine?. Zuniga MG1, Janky KL, ... Vestibular-evoked myogenic potential (VEMP) results in the ears (circles) of controls, vestibular migraine (VM), and Ménière ... B) Click-evoked ocular VEMP (oVEMP) n10 amplitudes. (C) The 500-Hz tone burst (TB)-evoked oVEMP n10 amplitudes. (D) The oVEMP ... Can Vestibular-Evoked Myogenic Potentials Help Differentiate Ménière Disease from Vestibular Migraine? ...
The somatosensory evoked potential (SEP) measured in response to median nerve stimulation was correlated with cortical and ... Alteration of somatosensory evoked potentials in response to global ischemia J Neurosurg. 1984 Mar;60(3):490-4. doi: 10.3171/ ... The somatosensory evoked potential (SEP) measured in response to median nerve stimulation was correlated with cortical and ...
Care guide for Evoked Potential Tests (Ambulatory Care). Includes: possible causes, signs and symptoms, standard treatment ... What will happen during the 3 evoked potential tests?. *The visual evoked potential (VEP) test measures your brains response ... What are evoked potential tests?. Evoked potential tests measure the electrical activity in your brain in response to sight, ... How do I prepare for an evoked potential test?. There is usually no preparation needed for an evoked potential test. You may ...
The waveform of the evoked visual potential is color specific. This specificity is absent in a color-deficient observer. ...
... or evoked responses, measure the electrophysiologic responses of the nervous system to a variety of stimuli. In theory, almost ... evoked potential (EP) studies-including visual evoked potential (VEP), brainstem auditory evoked potential (BAEP), and ... Brainstem Auditory Evoked Potentials. The brainstem auditory evoked potential (BAEP), or brainstem auditory evoked response ( ... Visual Evoked Potential. The visual evoked potential (VEP) tests the function of the visual pathway from the retina to the ...
... and visual evoked potentials (VEPs, including pattern [PVEP] and flash [FVEP]). As in EEG, evoked potential testing uses ... brainstem auditory evoked potentials (BAEPs), somatosensory evoked potentials (SSEPs, including various types such as the ... Waveforms recorded in evoked potential testing are identified with P for positive ... Several types of evoked potentials (stimulated electrical signals) may be recorded: ...
An evoked potential monitoring system including a control unit having stimulator circuitry and a probe assembly coupled to the ... 2. The evoked potential monitoring system of claim 1, wherein the stimulus probe is a nerve probe. 3. The evoked potential ... The evoked potential monitoring system of claim 1, wherein the switch has four degrees of freedom. 21. The evoked potential ... whereas evoked potential monitoring, such as motor evoked potential monitoring, provides feedback on spinal cord function. ...
ROCHA, Caroline Nunes et al. Brainstem auditory evoked potential with speech stimulus. Pró-Fono R. Atual. Cient. [online]. 2010 ... Palavras-chave : Electrophysiology; Evoked Potentials, Auditory, Brain Stem; Speech Perception. · resumo em Português · texto ... CONCLUSION: based on the gathered data it can be observed that this potential works as a new tool for understanding the ...
Olfactory Evoked Potentials. Olfactory Evoked Potentials and Developmental Neuropathology in Schizophrenia. The objective of ...
Corticocortical Evoked Potentials Reveal Projectors and Integrators in Human Brain Networks. Corey J. Keller, Christopher J. ... Corticocortical Evoked Potentials Reveal Projectors and Integrators in Human Brain Networks. Corey J. Keller, Christopher J. ... Corticocortical Evoked Potentials Reveal Projectors and Integrators in Human Brain Networks Message Subject (Your Name) has ... Corticocortical Evoked Potentials Reveal Projectors and Integrators in Human Brain Networks. Corey J. Keller, Christopher J. ...
Evoked Potentials, Visual: The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the ...
In this study, we introduce a method for combining information across excitatory postsynaptic potentials (EPSPs) that are ...
... steady-state visually evoked potentials (SSVEPs) have been shown to be useful for many paradigms in cognitive (visual attention ... Steady-state visually evoked potentials: focus on essential paradigms and future perspectives Prog Neurobiol. 2010 Apr;90(4): ... After 40 years of investigation, steady-state visually evoked potentials (SSVEPs) have been shown to be useful for many ... We investigate the steady-state evoked activity, its properties, and the mechanisms behind SSVEP generation. Next, we describe ...
The AAS and OBS methods lead to comparable results at the level of the grand average visual evoked potential (VEP), although ... Scanning strategies for simultaneous EEG-fMRI evoked potential studies at 3 T.. Warbrick T1, Bagshaw AP. ...
  • A) Click-evoked cervical VEMP (cVEMP) peak-to-peak amplitudes. (
  • B) Click-evoked ocular VEMP (oVEMP) n10 amplitudes. (
  • Recently, new clinical testing of saccular and utricular function have been developed and validated, the so-called vestibular-evoked myogenic potentials - VEMP (Brantberg et al. (
  • When we use the unqualified 'VEMP', we mean any vestibular evoked myogenic potential (i.e. cVEMP, oVEMP, tVEMP, etc). (
  • They also showed abnormally large sound-induced vestibular-evoked myogenic potentials (VEMP), i.e. the short latency sternomastoid muscle response considered to be of saccular origin. (
  • The vestibular-evoked myogenic potential (VEMP) is a relatively new approach for evaluating different parts of the vestibular system. (
  • More particularly, the cervical VEMP (cVEMP) presents a short latency and large amplitude myogenic potential, which presumably represents the saccule's response to sound when using an air-conducted stimulus [9-11]. (
  • OBJECTIVES: To investigate the vestibular evoked myogenic potentials (VEMP) results in benign paroxysmal positional vertigo (BPPV) patients and to verify its clinical applications in BPPV. (
  • Two such tests that have been useful for this purpose are Dynamic Visual Acuity (DVA) and Vestibular Evoked Myogenic Potentials (VEMP). (
  • How are diagnostic somatosensory evoked potentials (SEPs) interpreted? (
  • What is the clinical interpretation of somatosensory evoked potentials (SEPs)? (
  • Electrodes placed on the scalp pick up both SEPs generated in the cortex and thalamocortical fibers (which are picked up as near-field responses located in restricted areas) and far-field positivities reflecting the evoked activity generated in peripheral, spinal and brainstem somatosensory fibers. (
  • All had reflex muscle jerking and grossly enlarged somatosensory evoked responses (SEPs) following electrical stimulation of the digital nerves. (
  • Somatosensory evoked potentials (SEPs) were studied in 21 cases of amyotrophic lateral sclerosis (ALS) and 7 cases of primary lateral sclerosis (PLS). (
  • Radial, median, and ulnar nerve somatosensory evoked potentials (SEPs) were recorded, with non-cephalic reference montage, in 38 patients with clinical signs of cervical myelopathy and MRI evidence of spondylotic compression of the cervical cord. (
  • To investigate the effect of increasing spinal cord perfusion pressure (SCPP) on sensory evoked potentials (SEPs) and injury site metabolism in patients with severe traumatic spinal cord injury TSCI. (
  • Usually the term "evoked potential" is reserved for responses involving either recording from, or stimulation of, central nervous system structures. (
  • visual evoked potentials, and somatosensory evoked potentials , which are elicited by electrical stimulation of peripheral nerve. (
  • By analogy with the steady-state response of a resonant circuit that follows the initial transient response he defined an idealized steady-state evoked potential (SSEP) as a form of response to repetitive sensory stimulation in which the constituent frequency components of the response remain constant with time in both amplitude and phase. (
  • As with any evoked-potential test involving unilateral stimulation, excessive symmetries between the measurements following left-sided stimulation and those following right-sided stimulation also may reveal abnormalities. (
  • On the use of information theory for the analysis of synchronous nociceptive withdrawal reflexes and somatosensory evoked potentials elicited by graded electrical stimulation. (
  • Somatosensory evoked potentials following median nerve stimulation. (
  • J.P.C. de Weerd Evoked potentials are the electrical voltage fluctuations which can be recorded from parts of the nervous system in response to stimulation of sensory modalities. (
  • Stimulation produces an action potential that travels up the axon toward the spinal cord and past the cell bodies of the sensory axons of the large-fiber sensory system in the dorsal root ganglia to the ipsilateral posterior columns of the spinal cord. (
  • Visual evoked potentials (VEPs) from stimulation by checkerboard pattern reversal were examined in 54 rotogravure printers exposed to toluene (all men, aged 22-64 years, duration of exposure 1-41 years). (
  • Somatosensory evoked potential (SEP or SSEP) is the electrical activity of the brain that results from the stimulation of touch. (
  • First, increased heartbeat-evoked neural activity before stimulation is followed by decreased somatosensory detection. (
  • The somatosensory evoked potential (SEP) measured in response to median nerve stimulation was correlated with cortical and white matter cerebral blood flow (CBF), adenosine triphosphate (ATP), and lactate levels in 14 cats subjected to graded hemorrhagic hypotension following bilateral carotid artery ligation. (
  • 5. The evoked potential monitoring system of claim 1, wherein the control unit is adapted to record a patient's response to stimulation energy delivered by the stimulus probe. (
  • 6. The evoked potential monitoring system of claim 1, wherein the system is adapted such that movement of the switch continuously varies the stimulation energy level delivered to the stimulus probe over a series of discrete, sequential steps. (
  • 7. The evoked potential monitoring system of claim 6, wherein the system is adapted such that the switch can be operated to select any of the discrete, incremental stimulation energy level steps available through the control unit. (
  • 8. The evoked potential monitoring system of claim 6, wherein the system is adapted to increment or decrement the stimulation energy level delivered to the stimulus probe in a non-linear fashion in response to movement of the switch. (
  • 10. The evoked potential monitoring system of claim 1, wherein the system is adapted such that movement of the switch increments the stimulation energy level delivered by the stimulus probe. (
  • This study investigated whether the optic nerve evoked potential (ONEP) elicited by electrical stimulation of the optic nerve can serve as a reliable intraoperative indicator of visual function. (
  • Evoked potential monitoring is performed at the probe surface via stimulation energy delivered along the electrical pathway, and tissue/bone resection occurs with rotation of the cutting tip. (
  • Surface electrodes have been used to record potentials evoked in the lumbosacral region of 15 healthy volunteers after tibial nerve stimulation. (
  • Evoked responses recorded from the amygdala of the cat after sequentially pairing neocortical and hypothalamizic stimulation showed consistent suippression or depression of the response evoked by the test shocks, regardless of whether the cortical or subcortical site received the preceding conditioning shock. (
  • How reproducible are transcranial magnetic stimulation induced Motor Evoked Potentials in subacute stroke? (
  • Motor evoked potentials (MEPs) and total motor conduction time (TMCT) induced by transcranial magnetic stimulation (TMS) are used to make assumptions about the prognosis of motor outcome after stroke. (
  • Assessing the reproducibility of transcranial magnetic stimulation (TMS) measurements requires studies to investigate the test-retest reliability of TMS induced motor evoked potentials (MEPs) and total motor conduction time (TMCT). (
  • Transdiaphragmatic pressure output of cervical magnetic stimulation (with subdivision in oesophageal and gastric component), and respiratory-related evoked potentials (C3 and C4 derivations in the international 10-20 system) following mid-inspiratory occlusions were studied before and after an inspiratory-resistive loading challenge. (
  • The stimulation of intercostal 8 and phrenic 9 , 10 afferents indeed evoke cerebral potentials in humans. (
  • The Evoked Potential (EP) is a recording of electrical activity from the brain, spinal nerves, or sensory receptors in response to specific external stimulation, whether it be visual, auditory, or sensory stimulation. (
  • Onset Latency of Motor Evoked Potentials in Motor Cortical Mapping with Neuronavigated Transcranial Magnetic Stimulation. (
  • Sensory evoked potentials studies measure electrical activity in the brain in response to stimulation of sight, sound, or touch. (
  • Enhancement of bilateral cortical somatosensory evoked potentials to intact forelimb stimulation following thoracic contusion spinal cord injury in rats. (
  • The IAF also predicts (ii) the amplitude of the visual evoked potential (VEP), as well as (iii) the amplitude of the alpha-rhythm during stimulation. (
  • Somatosensory evoked potentials after multisegmental upper limb stimulation in diagnosis of cervical spondylotic myelopathy. (
  • Electrically evoked compound action potentials (ECAP) are strongly affected by stimulation artifact. (
  • In this study we analyze and compare different methods to process the stimulation artifact affecting the electrically evoked compound action potentials. (
  • Takano H, Tamaki T, Noguchi T, Takakuwa K (1985) Comparison of spinal cord evoked potentials elicited by spinal cord and peripheral nerve stimulation. (
  • 11 first reported improved monitoring with paired stimulation, which is attributed to effective accumulation of excitatory postsynaptic potentials at the level of the anterior horn motor neurons. (
  • Reproducible evoked potential recordings after anorectal stimulation were difficult but possible in minority of subjects, and when recorded showed intersubject and intrasubject variation. (
  • Cerebral evoked potentials can not be reliably recorded after anorectal stimulation, and when recorded the several kinds of latencies are of too broad a range to evaluate anorectal function. (
  • Chiappa KH, Gladstone KJ, Young RR: Brain stem auditory evoked responses: Studies of waveform variations in 50 normal human subjects. (
  • For the latter type a further subdivision can be made into spinal, brainstem, and cortical evoked potentials, according to the (assumed) structures from which the responses derive. (
  • Evoked responses indicate the brain's response to specific stimuli. (
  • The second section outlines specific auditory evoked potentials and the measurement of those responses. (
  • This [book] is a comprehensive overview of a wide range of auditory evoked responses for clinicians and researchers. (
  • This effect can be explained by subjects adopting a more conservative decision criterion, which is accompanied by changes in early and late somatosensory-evoked responses. (
  • Second, stimulus timing during the cardiac cycle affects sensitivity but not criterion for somatosensory stimuli, which is reflected only in late somatosensory-evoked responses. (
  • To characterize both cervical and ocular vestibular-evoked myogenic potential (cVEMP, oVEMP) responses to air-conducted sound (ACS) and midline taps in Ménière disease (MD), vestibular migraine (VM), and controls, as well as to determine if cVEMP or oVEMP responses can differentiate MD from VM. (
  • The data suggest a difference in 500-Hz tone burst-evoked oVEMP responses between MD and MV as a group. (
  • Evoked potentials (EPs), or evoked responses, measure the electrophysiologic responses of the nervous system to a variety of stimuli. (
  • Late evoked responses are generally used for studying higher cortical functions (eg, P300 in Alzheimer disease). (
  • Nevertheless, late evoked responses show promise and may make more inroads into clinical settings in the near future. (
  • Some centers have developed testing paradigms for olfactory and gustatory evoked responses as well. (
  • In 1982, we published a preliminary study on the interest in the study of cortical evoked responses audiometry (CERA) in the field of expertise. (
  • Contact heat evoked potential (CHEP) is a newly-developed approach to record cerebral responses of Aδ fiber-mediated thermonociceptive stimuli. (
  • Androulidakis and Jones (2006) recorded N1 and P2 responses evoked to a 1000 Hz tone in quiet and in the presence of unmodulated and modulated noise. (
  • MEP stimulus intensity was increased up to 500 V until evoked potential responses were detectable. (
  • Long and Allen [3] reported the abnormal brainstem auditory evoked potentials (BAEP) in an alcoholic woman who recovered from acquired central hypoventilation syndrome . (
  • What is Brainstem Auditory Evoked Potentials (BAEP)? (
  • Brainstem auditory evoked potential (BAEP) tests evaluate how the the brainstem responds to specific sounds. (
  • There are no evaluations for Brainstem Auditory Evoked Potentials (BAEP). (
  • It is noteworthy that these children may exhibit alterations in the values of latency and amplitude of the N2 component (3), as well as the latency values of Brainstem Auditory Evoked Potential (BAEP) and P300 - with a higher occurrence of alterations being reported for the P300. (
  • Fifty-one children with bacterial meningitis were studied prospectively using serial recordings of brainstem auditory evoked potential (BAEP) from the earliest phase of the disease, according to a standardized protocol. (
  • The Brainstem Auditory Evoked Potential (BAEP) assists in evaluating the auditory nerve pathways from the ears through the brainstem. (
  • Brainstem Auditory Evoked Potential (BAEP) Two disks will be placed on your scalp. (
  • Pilot data showed abnormal flash visual evoked potentials (VEPs) in neonates exposed to methadone in utero, but results were confounded by intrauterine growth restriction, gestation, and ongoing drug misuse. (
  • 7 - 12 Flash visual evoked potentials (VEPs) in infancy reflect the integrity and maturity of the visual system, 13 - 16 and we have demonstrated abnormal VEPs in newborn infants exposed to methadone in utero. (
  • Visual Evoked Potentials (VEPs) evaluate the visual nervous system from the eyes to the occipital (visual) cortex of the brain. (
  • The visual evoked potential (VEP) can be used to assess the integrity and maturity of the infant visual pathway and both visual and neurodevelopmental abnormalities can be predicted by abnormal VEPs in infancy. (
  • In the decade of the 1980s, many clinical EEG laboratories have added average evoked potential studies to their routine procedures. (
  • Indeed, short-latency brain-stem auditory-evoked potentials, as well as short- and intermediate-latency cortical-evoked potentials, lately have proved to be valuable clinical tools for objectively testing afferent functions in patients with neurological and sensory disorders. (
  • Sensory evoked potentials have been widely used in clinical diagnostic medicine since the 1970s, and also in intraoperative neurophysiology monitoring (IONM), also known as surgical neurophysiology. (
  • this book makes an enjoyable reading for those that use some form of auditory evoked potentials for their clinical or research work and are interested in learning about other aspects of such a widespread subject involving neurologists, physiologists, psychologists, neuro-otologists and other specialists and researchers in the field. (
  • This course is for you if you are looking to develop your knowledge in nerve conduction studies and evoked potentials in clinical practice. (
  • This module will introduce you to the underlying theory of carrying out nerve conduction studies, evoked potentials and your role in clinical practice. (
  • Vestibular evoked myogenic potentials and their clinical utility in patients with amyotrophic lateral sclerosis. (
  • Somatosensory evoked potential testing (SSEP) has been successfully utilized in clinical medicine for the past twenty years. (
  • Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. (
  • To evaluate the sensitivity of contact heat evoked potentials (CHEPs) compared with dermatomal somatosensory evoked potentials (dSSEPs) and clinical sensory testing in myelopathic spinal cord disorders (SCDs). (
  • To assess whether patients having stable chronic obstructive pulmonary disease (COPD) with no clinical evidence of visual impairment or peripheral neuropathy have visual evoked potentials (VEP) abnormalities on electrophysiologic evaluation. (
  • Update on laser-evoked potential findings in fibromyalgia patients in light of clinical and skin biopsy features. (
  • Thus evoked compound motor action potentials (CMAP) or sensory nerve action potentials (SNAP) as used in nerve conduction studies (NCS) are generally not thought of as evoked potentials, though they do meet the above definition. (
  • Effects of acoustic noise on the auditory nerve compound action potentials evoked by electric pulse trains. (
  • This study investigated the effects of acoustic noise on the auditory nerve compound action potentials in response to electric pulse trains. (
  • Electrically evoked compound action potentials (ECAP) were recorded from the auditory nerve trunk in response to electric pulse trains both during and after the presentation of acoustic white noise. (
  • Tri-phase stimuli is a promising method for artifact cancellation in electrically evoked compound action potentials. (
  • This was initially accomplished by stimulating the motor cortex transcranially, and recording the subsequent evoked action potentials in peripheral muscles. (
  • OBJECTIVE: To review the experience at a single institution with motor evoked potential (MEP) monitoring during intracranial aneurysm surgery to determine the incidence of unacceptable movement. (
  • The feasibility and reliability of combined use of transcranial and direct cortical motor evoked potential (MEP) monitoring during unruptured aneurysm surgery were evaluated. (
  • Transcranial motor evoked potential (TcMEP) monitoring is frequently used in complex spinal surgeries to prevent neurological injury. (
  • Different types of potentials result from stimuli of different modalities and types. (
  • In general, somatosensory stimuli evoke early cortical components (N25, P60, N80), generated in the contralateral primary somatosensory cortex (S1), related to the processing of the physical stimulus attributes. (
  • To evaluate the impact of mild hypoglycemia on CNS function in healthy adults, we measured brain stem auditory evoked potentials and P300 potentials (elicited by cognitive processing of auditory stimuli) during hypoglycemic or euglycemic insulin clamps (80 mU · m −2 · min −1 ). (
  • Stimuli presented during sleep can produce an evoked EEG delta wave referred to as a K-complex. (
  • Sensory evoked potentials studies involve 3 tests that measure response to visual, auditory, and electrical stimuli. (
  • VEP are electrical potential differences generated in response to visual stimuli and are usually recorded over vortex. (
  • The detection of cortical auditory evoked potentials (CAEP), which are part of the electroencephalogram (EEG) in reaction to acoustic stimuli, has important applications such as determining objective audiograms. (
  • Nakata H, Sakamoto K, Yumoto M, Kakigi R. The relationship in gating effects between short-latency and long-latency somatosensory-evoked potentials. (
  • Evoked potential is different from event-related potential (ERP), although the terms are sometimes used synonymously, because ERP has higher latency, and is associated with higher cognitive processing. (
  • to characterize the long latency auditory evoked potentials (LLAEP) results N1, P2, N2 and P300 of children with phonological disorder and to verify the improvement of such potentials with speech therapy. (
  • Auditory event-related evoked potential P 300 latency was measured using an oddball paradigm in patients with respiratory failure due to any cause (partial pressure of oxygen in arterial blood (PO 2 ) should be 75 mm/Hg or less). (
  • However, the potential of latency mapping to identify stressed motor tract connections at the subcortical level will need to be verified in future studies with patients. (
  • To evaluate the effects of unilateral compressive optic neuropathy on amplitude and latency of multifocal visual evoked potentials (mfVEPs). (
  • 1 compared the prediction probability of two methods, i.e. , bispectral analysis of the electroencephalograph (BIS ® ) and peak amplitudes and latencies of middle-latency auditory-evoked potential (AEP). (
  • An evoked potential or evoked response is an electrical potential recorded from the nervous system of a human or other animal following presentation of a stimulus , as distinct from spontaneous potentials as detected by electroencephalography (EEG), electromyography (EMG), or other electrophysiologic recording method. (
  • An evoked potential is the electrical response of the brain to a sensory stimulus. (
  • An evoked potential or evoked response is an electrical potential in a specific pattern recorded from a specific part of the nervous system, especially the brain, of a human or other animals following presentation of a stimulus such as a light flash or a pure tone. (
  • Evoked potentials are mainly classified by the type of stimulus: somatosensory, auditory, visual. (
  • 2. The evoked potential monitoring system of claim 1, wherein the stimulus probe is a nerve probe. (
  • An event-related potential , elicited by, and time-lockied to a stimulus . (
  • The averaged KC that can be evoked by a stimulus provides a novel experimentally controlled probe of delta EEG production. (
  • However, if a patient has only partial hearing capability, an AEP could be evoked by a click stimulus. (
  • One may distinguish between evoked potentials from the peripheral and the central nervous system. (
  • 4 ] It is of interest to observe if visual evoked potentials (VEP) are also affected in these patients due to similar pathogenesis involving peripheral neuropathy and brain stem auditory evoked potential abnormalities. (
  • To assess abnormalities of sensory conduction and find new markers of anorectal function in anorectal disease in children, we have evaluated peripheral sensory perception and somatosensory evoked potentials produced by anorectal stimuration in patients with anorectal malformation in the long-term more than seven years. (
  • Test-Retest Reliability of ocular vestibular evoked myogenic potentials (oVEMPs) across different electrode montages. (
  • At the present time, the former three types of evoked potentials are the ones that are commonly measured in diagnostic procedures. (
  • Anterior Cervical Disc Fusion Does not Affect the Presence of Cervical Vestibular-Evoked Myogenic Potential. (
  • Singh NK, Krishnamurthy R, Premkumar PK (2015) Relative efficiency of cochlear hydrops analysis masking procedure and cervical vestibular evoked myogenic potential in identification of Meniere's disease. (
  • Can vestibular-evoked myogenic potentials help differentiate Ménière disease from vestibular migraine? (
  • The role of vestibular evoked myogenic potentials in multiple sclerosis-related vertigo. (
  • To evaluate the diagnostic value of vestibular evoked myogenic potentials (VEMPs) in the assessment of brainstem function integrity in patients with amyotrophic lateral sclerosis (ALS). (
  • Is There a Safe Level for Recording Vestibular Evoked Myogenic Potential? (
  • There is a growing concern among the scientific community about the possible detrimental effects of signal levels used for eliciting vestibular evoked myogenic potentials (VEMPs) on hearing. (
  • Preoperative Assessment of Cervical Vestibular Evoked Myogenic Potentials (cVEMPs) Help in Predicting Hearing Preservation After Removal of Vestibular Schwannomas Through a Middle Fossa Craniotomy. (
  • To determine whether cervical vestibular evoked myogenic potentials (cVEMPs) are predictive of hearing preservation in patients undergoing vestibular schwannoma removal through middle fossa craniotomy. (
  • We will use the terminology 'cVEMP' to denote vestibular evoked myogenic potentials elicited from the sternocleidomastoid muscle. (
  • Akkuzu G, Akkuzu B, Ozluoglu LN (2006) Vestibular evoked myogenic potentials in benign paroxysmal positional vertigo and Meniere's disease. (
  • Egami N, Ushio M, Yamasoba T, Yamaguchi T, Murofushi T, Iwasaki S (2013) The diagnostic value of vestibular evoked myogenic potentials in patients with Meniere's disease. (
  • Sinha SK, Sarvanan P (2013) Utility of Vestibular evoked myogenic potentials in the diagnosis of Meniere's disease: a review. (
  • Somatosensory Evoked Potentials (SSEPs) assess pathways from nerves in the arms or legs, through the spinal cord to the brainstem or cerebral cortex. (
  • We used cortical somatosensory evoked potentials (SSEPs) to evaluate changes in intact forelimb pathways. (
  • EP is distinct from spontaneous potentials as detected by electroencephalography (EEG), electromyography (EMG), or other electrophysiologic recording method. (
  • Immature visual evoked potentials have been reported in this population, but data were confounded by gestation, growth restriction, and illicit drug use. (
  • Visual evoked potentials are small and immature in infants exposed to methadone and other drugs of misuse in utero. (
  • The waveform of the evoked visual potential is color specific. (
  • The visual evoked potential (VEP) tests the function of the visual pathway from the retina to the occipital cortex. (
  • The 3 most common types of evoked potential tests include visual (sight), auditory (hearing), and somatosensory (touch). (
  • The visual evoked potential (VEP) test measures your brain's response to visual triggers. (
  • A visual evoked potential test (VEP) is used to look for problems in the brain or nerves that affect vision. (
  • Visual evoked potentials is an important visual electrophysiological tool which has been used for the evaluation of visual field defects in primary open-angle glaucoma and is an appropriate objective measure of optic nerve function. (
  • Electrophysiological tests like visual evoked potentials can contribute to detection of glaucomatous optic neuropathy since they are compatible with the functions of retinal ganglion cells, and they make it possible to study different aspects of visual functions. (
  • The visual evoked potential is the objective measurement of visual function monitored at the level of the occipital cortex with scalp electrodes. (
  • This paper summarizes many of the studies pertaining to the significance of visual evoked potentials in the assessment of visual field defects in primary open-angle glaucoma. (
  • The assessment of visual field defects with visual evoked potential has been a hard task. (
  • Ever since visually evoked cortical potentials were first used as a diagnostic aid the important question has been whether they could detect visual field defects. (
  • Types of Evoked Potential Tests Visual Evoked Potential (VEP) Five disks will be placed on your scalp. (
  • The aim of this study is to investigate the usefulness of visual evoked potentials (VEP) in patients with pineal gland cyst due to the possible compression on the visual pathway. (
  • Objective measurements of visual function would be ideal, and multifocal visual evoked potential (mfVEP) recording may be able to suit this need. (
  • Multifocal visual evoked potential (mfVEP) data. (
  • Visual evoked response (VER) test. (
  • However, it can potentially affect visual evoked potential (VEP) recordings due to GABAergic activity associated with it and subsequent burst suppression on the electroencephalogram response. (
  • Objective acuity assessment by Visual Evoked Potential (VEP) provides a complementary assessment in those subjects who cannot complete subjective tests. (
  • The purpose of this study was to evaluate correlations of visual-evoked potentials with microstructural brain changes as determined by DTI in patients with demyelinating central nervous disease. (
  • The mean P100 visual-evoked potential latencies of the right and left eyes of each patient were calculated and used for the analysis. (
  • Fractional anisotropy, radial diffusivity, and axial diffusivity were calculated and correlated with mean P100 visual-evoked potentials by tract-based spatial statistics. (
  • Significant negative correlations between mean P100 visual-evoked potentials and fractional anisotropy and significant positive correlations between mean P100 visual-evoked potentials and radial diffusivity were found widespread over the whole brain. (
  • Significant positive correlations between mean P100 visual-evoked potentials and axial diffusivity were less widespread, notably sparing the optic radiation. (
  • Microstructural changes of the whole brain correlated significantly with mean P100 visual-evoked potentials. (
  • This finding suggests a stronger correlation of mean P100 visual-evoked potentials to demyelination than to axonal damage. (
  • Aim To investigate optic nerve function using the pattern-reversed visual evoked cortical potentials (VECP) before and after bony orbital decompression in dysthyroid optic neuropathy (DON) due to Graves' disease. (
  • Zhao J, Luo X, Zhang Z, Chen K, Shi G, Zhou J. [Use of somatosensory evoked potentials for preoperative assessment in patients with severe aneurysmal subarachnoid hemorrhage before surgical or interventional treatment: a prospective observational cohort study]. (
  • The third section covers specific applications of auditory evoked potentials, including infant hearing assessment, neurotology, auditory neuropathy, and cochlear implants. (
  • Tamaki T, Takano H, Takakuwa K, Tsuji H, Nakagawa T, Imai K, Inoue S (1985) An assessment of the use of spinal cord evoked potentials in prognosis estimation of injured spinal cord. (
  • To resolve these low-amplitude potentials against the background of ongoing EEG, ECG, EMG, and other biological signals and ambient noise, signal averaging is usually required. (
  • [7] Since a SSEP can be completely described in terms of the amplitude and phase of each frequency component it can be quantified more unequivocally than an averaged transient evoked potential. (
  • Effect of Mild Hypothermic Cardiopulmonary Bypass on the Amplitude of Somatosensory-evoked Potentials. (
  • The P2, N550, and P900 components of the evoked K-complex are sensitive measures of normal healthy brain aging, showing a decrease in amplitude with age. (
  • The present study tested the hypothesis that the amplitude of K-complex related evoked potential components would increase with prolonged abstinence. (
  • A complete audiogram was collected using auditory evoked potential techniques that included measurements of nine frequencies from 4 to 100 kHz presented as sinusoidally amplitude-modulated tones. (
  • The relation between IAF, alpha-amplitude, evoked potential and vascular response is discussed in the framework of a simple heuristic model. (
  • In fact, the amplitude of the potential increases proportionately with the mean level of tonic muscle activation [9]. (
  • In this study, we introduce a method for combining information across excitatory postsynaptic potentials (EPSPs) that are quantal in nature. (
  • Subthreshold excitatory postsynaptic potentials (EP-SPs), mediated by the activation of glutamate receptor channels, caused a brief increase in dendritic [Ca2+]i. (
  • I had abnormal sensory evoked potential testing: when my left tibial nerve was stimulated the signal is normal until it gets into the cortex and then it becomes absent. (
  • Why don't you tell us what led to your having the sensory evoked potential? (
  • The sensory evoked potential studies are considered safe procedures. (
  • IONM should be reported under procedure code 95940, 95941, G0453 regardless of the specific monitoring performed (e.g., brainstem auditory evoked response, somatosensory evoked potentials, etc. (
  • Brainstem auditory evoked response (BAER) test. (
  • The latencies and amplitudes of all the components of the respiratory-related evoked potentials were unchanged. (
  • To determine possible exposure-associated delays in auditory brainstem evoked potential latencies as an objective measure of neurobehavioral toxicity in 14-year-old children with developmental exposure to methylmercury (MeHg) from seafood. (
  • Latencies of brainstem evoked potential peaks I, III, and V at 20 and 40 Hz constituted the outcome variables. (
  • Visually evoked potentials. (
  • Available at: (
  • The relationship of the "augmenting/reducing" tendency of visually evoked cortical. (
  • Moncho D, Poca MA, Minoves T, Ferré A, Rahnama K, Sahuquillo J. Brainstem auditory and somatosensory evoked potentials: a methodological study to evaluate the reproducibility of two devices. (
  • Somatosensory Evoked Potentials as a Tool to Evaluate Brainstem Herniation in the Neuroscience Intensive Care Unit. (
  • Evoked potentials are used to evaluate the functioning of the sensory neural pathways. (
  • This edited volume Event-Related Potentials and Evoked Potentials is a collection of reviewed and relevant research chapters, offering a comprehensive overview of recent developments in the field of medicine and health sciences. (
  • Often used synonymously to event-related potentials which are associated with higher level cognitive processes. (
  • Both before and after the priming, event-related potentials (ERPs) elicited by painful and non-painful electrical stimulations were recorded. (
  • Dermatomal evoked potentials are being used to obtain accurate information concerning the viability of specific nerve root pathways and the quality and extent of nerve root decompression. (
  • Therefore, the objective of this study was to characterize the results of LLAEP obtained in children with phonological disorder and to investigate the development of the potential after Speech therapy as well as to correlate the development of potentials and the history of otitis and severity of the phonological disorder. (
  • Somatosensory evoked potential (SSEP) testing is a non-invasive, objective procedure, which achieves a high degree of sensitivity and specificity for identifying neurological insult. (
  • Auditory evoked potentials provide "objective" information regarding the structure and function of the auditory neurological pathway. (
  • Effects of hypotensive ischemia on somatosensory evoked potentials in cerebral cortex and spinal cord. (
  • Functional resistance to graded hypotensive ischemia of various segments of the somatosensory pathway was determined in anesthetized cats by repeated concurrent recordings of regional blood flow measured by hydrogen clearance, and evoked potentials (EPs), of dorsal horn of lumbar spinal cord and cerebral cortex. (
  • Wang Y, Li G, Luk KDK, Hu Y. Component analysis of somatosensory evoked potentials for identifying spinal cord injury location. (
  • Evoked potential amplitudes tend to be low, ranging from less than a microvolt to several microvolts, compared to tens of microvolts for EEG, millivolts for EMG, and often close to 20 millivolts for ECG . (
  • Only the MD group showed reduction in tone-evoked amplitudes for oVEMP. (
  • C) The 500-Hz tone burst (TB)-evoked oVEMP n10 amplitudes. (
  • Among different neuropathic pain symptoms, the subgroup with evoked pain had higher CHEP amplitudes than the subgroup without evoked pain (p=0.011). (
  • However, the evoked potentials test can sometimes confirm a diagnosis of multiple sclerosis. (
  • Whittle IR, Johnston IH, Besser M (1986) Intraoperative recording of cortical somatosensory evoked potential as a method of spinal cord monitoring during spinal surgery. (
  • The utility of median somatosensory evoked potentials in anoxic-ischemic coma. (
  • However, the most recent advances were brought about by multichannel recordings of evoked potentials coupled with source modeling and source localization in 3D images of brain volume provided by magnetic resonance imaging (MRI). (
  • An event-related potential (ERP) is the measured brain response that is the direct result of a specific sensory, cognitive, or motor event. (
  • Evoked potential tests measure the electrical activity in your brain in response to sight, sound, or sensation. (
  • as well as pain-evoked brain potentials ( Eimer and rster, 2003 ). (
  • Brain stem and P300 potentials remained unchanged until the 3-mM glucose step, when neurophysiological changes suddenly developed in conjunction with reported symptoms. (
  • At this glucose level, the wave V component of the brain stem potential was selectively altered in 7 of 8 subjects. (
  • A simple means to study the cortical processing of respiratory afferents is to record the brain activity following repeated inspiratory occlusions at the airway opening (respiratory-related evoked potentials (RREP)), even though the exact source of this activity is not precisely known. (
  • What is Evoked Potential Testing This test measures how well the nerves in your body send messages to your brain. (
  • The data indicate that the sleep evoked response may provide a sensitive marker of brain recovery with abstinence from alcohol. (
  • based on the gathered data it can be observed that this potential works as a new tool for understanding the encoding of sound at the brainstem level. (
  • Time-frequency analysis of somatosensory evoked potentials for intraoperative spinal cord monitoring. (
  • Such potentials are useful for electrodiagnosis and monitoring that include detections of disease and drug-related sensory dysfunction and intraoperative monitoring of sensory pathway integrity. (
  • Koht A, Sloan T, Ronai A, Toleikis JR (1985) Intraoperative deterioration of evoked potentials during spinal surgery. (
  • Intraoperative use of somatosensory-evoked potential in monitoring nerve roots. (
  • Intraoperative monitoring using somatosensory evoked potentials. (
  • In addition to the standard exams, patients were evaluated using somatosensory evoked potential tests according to the Glick protocol. (
  • This study aimed to test whether serotonergic neurotransmission, using the loudness dependence of auditory evoked potential (LDAEP), is associated with circadian preference in patients with major depressive disorder (MDD). (
  • The presence of mismatch negativity during the cortical auditory-evoked potential could contribute to further progress in neurological prognostication of these patients. (
  • Results of cortical auditory-evoked potential will remain blinded of bedside clinicians providing care for the patients. (
  • When patients cannot be assessed with behavioral techniques, auditory evoked potentials are often employed. (
  • Diagnostic accuracy of somatosensory evoked potential monitoring during scoliosis fusion. (
  • Understand the diagnostic value and limitations of evoked potential techniques. (
  • The interest of slow vertex response audiometry (cortical evoked response audiometry), mainly in the diagnosis of pseudohypacousis is reported. (
  • However, if a provider reports any neurophysiological studies in addition to comprehensive evoked response audiometry, the charges should be combined and processed under code 92585. (