Hearing Loss: A general term for the complete or partial loss of the ability to hear from one or both ears.Cochlear Implants: Electronic hearing devices typically used for patients with normal outer and middle ear function, but defective inner ear function. In the COCHLEA, the hair cells (HAIR CELLS, VESTIBULAR) may be absent or damaged but there are residual nerve fibers. The device electrically stimulates the COCHLEAR NERVE to create sound sensation.Hearing: The ability or act of sensing and transducing ACOUSTIC STIMULATION to the CENTRAL NERVOUS SYSTEM. It is also called audition.Neuroma, Acoustic: A benign SCHWANNOMA of the eighth cranial nerve (VESTIBULOCOCHLEAR NERVE), mostly arising from the vestibular branch (VESTIBULAR NERVE) during the fifth or sixth decade of life. Clinical manifestations include HEARING LOSS; HEADACHE; VERTIGO; TINNITUS; and FACIAL PAIN. Bilateral acoustic neuromas are associated with NEUROFIBROMATOSIS 2. (From Adams et al., Principles of Neurology, 6th ed, p673)Cochlear Implantation: Surgical insertion of an electronic hearing device (COCHLEAR IMPLANTS) with electrodes to the COCHLEAR NERVE in the inner ear to create sound sensation in patients with residual nerve fibers.Acoustic Stimulation: Use of sound to elicit a response in the nervous system.Auditory Threshold: The audibility limit of discriminating sound intensity and pitch.Hearing Aids: Wearable sound-amplifying devices that are intended to compensate for impaired hearing. These generic devices include air-conduction hearing aids and bone-conduction hearing aids. (UMDNS, 1999)Otologic Surgical Procedures: Surgery performed on the external, middle, or internal ear.Hearing Loss, High-Frequency: Hearing loss in frequencies above 1000 hertz.Dizocilpine Maleate: A potent noncompetitive antagonist of the NMDA receptor (RECEPTORS, N-METHYL-D-ASPARTATE) used mainly as a research tool. The drug has been considered for the wide variety of neurodegenerative conditions or disorders in which NMDA receptors may play an important role. Its use has been primarily limited to animal and tissue experiments because of its psychotropic effects.Auditory Cortex: The region of the cerebral cortex that receives the auditory radiation from the MEDIAL GENICULATE BODY.Receptors, N-Methyl-D-Aspartate: A class of ionotropic glutamate receptors characterized by affinity for N-methyl-D-aspartate. NMDA receptors have an allosteric binding site for glycine which must be occupied for the channel to open efficiently and a site within the channel itself to which magnesium ions bind in a voltage-dependent manner. The positive voltage dependence of channel conductance and the high permeability of the conducting channel to calcium ions (as well as to monovalent cations) are important in excitotoxicity and neuronal plasticity.Excitatory Amino Acid Antagonists: Drugs that bind to but do not activate excitatory amino acid receptors, thereby blocking the actions of agonists.Barbiturates: A class of chemicals derived from barbituric acid or thiobarbituric acid. Many of these are GABA MODULATORS used as HYPNOTICS AND SEDATIVES, as ANESTHETICS, or as ANTICONVULSANTS.Pentobarbital: A short-acting barbiturate that is effective as a sedative and hypnotic (but not as an anti-anxiety) agent and is usually given orally. It is prescribed more frequently for sleep induction than for sedation but, like similar agents, may lose its effectiveness by the second week of continued administration. (From AMA Drug Evaluations Annual, 1994, p236)Rats, Sprague-Dawley: A strain of albino rat used widely for experimental purposes because of its calmness and ease of handling. It was developed by the Sprague-Dawley Animal Company.Auditory Pathways: NEURAL PATHWAYS and connections within the CENTRAL NERVOUS SYSTEM, beginning at the hair cells of the ORGAN OF CORTI, continuing along the eighth cranial nerve, and terminating at the AUDITORY CORTEX.Chloride Channels: Cell membrane glycoproteins that form channels to selectively pass chloride ions. Nonselective blockers include FENAMATES; ETHACRYNIC ACID; and TAMOXIFEN.Dictionaries, MedicalDictionaries as Topic: Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.Lymphocyte Activation: Morphologic alteration of small B LYMPHOCYTES or T LYMPHOCYTES in culture into large blast-like cells able to synthesize DNA and RNA and to divide mitotically. It is induced by INTERLEUKINS; MITOGENS such as PHYTOHEMAGGLUTININS, and by specific ANTIGENS. It may also occur in vivo as in GRAFT REJECTION.Immunity, Cellular: Manifestations of the immune response which are mediated by antigen-sensitized T-lymphocytes via lymphokines or direct cytotoxicity. This takes place in the absence of circulating antibody or where antibody plays a subordinate role.Lymphocytes: White blood cells formed in the body's lymphoid tissue. The nucleus is round or ovoid with coarse, irregularly clumped chromatin while the cytoplasm is typically pale blue with azurophilic (if any) granules. Most lymphocytes can be classified as either T or B (with subpopulations of each), or NATURAL KILLER CELLS.Phytohemagglutinins: Mucoproteins isolated from the kidney bean (Phaseolus vulgaris); some of them are mitogenic to lymphocytes, others agglutinate all or certain types of erythrocytes or lymphocytes. They are used mainly in the study of immune mechanisms and in cell culture.T-Lymphocytes: Lymphocytes responsible for cell-mediated immunity. Two types have been identified - cytotoxic (T-LYMPHOCYTES, CYTOTOXIC) and helper T-lymphocytes (T-LYMPHOCYTES, HELPER-INDUCER). They are formed when lymphocytes circulate through the THYMUS GLAND and differentiate to thymocytes. When exposed to an antigen, they divide rapidly and produce large numbers of new T cells sensitized to that antigen.Islets of Langerhans Transplantation: The transference of pancreatic islets within an individual, between individuals of the same species, or between individuals of different species.Leukocytes, Mononuclear: Mature LYMPHOCYTES and MONOCYTES transported by the blood to the body's extravascular space. They are morphologically distinguishable from mature granulocytic leukocytes by their large, non-lobed nuclei and lack of coarse, heavily stained cytoplasmic granules.Dictionaries, ChemicalEar, Inner: The essential part of the hearing organ consists of two labyrinthine compartments: the bony labyrinthine and the membranous labyrinth. The bony labyrinth is a complex of three interconnecting cavities or spaces (COCHLEA; VESTIBULAR LABYRINTH; and SEMICIRCULAR CANALS) in the TEMPORAL BONE. Within the bony labyrinth lies the membranous labyrinth which is a complex of sacs and tubules (COCHLEAR DUCT; SACCULE AND UTRICLE; and SEMICIRCULAR DUCTS) forming a continuous space enclosed by EPITHELIUM and connective tissue. These spaces are filled with LABYRINTHINE FLUIDS of various compositions.Sound: A type of non-ionizing radiation in which energy is transmitted through solid, liquid, or gas as compression waves. Sound (acoustic or sonic) radiation with frequencies above the audible range is classified as ultrasonic. Sound radiation below the audible range is classified as infrasonic.Sound Localization: Ability to determine the specific location of a sound source.Ear: The hearing and equilibrium system of the body. It consists of three parts: the EXTERNAL EAR, the MIDDLE EAR, and the INNER EAR. Sound waves are transmitted through this organ where vibration is transduced to nerve signals that pass through the ACOUSTIC NERVE to the CENTRAL NERVOUS SYSTEM. The inner ear also contains the vestibular organ that maintains equilibrium by transducing signals to the VESTIBULAR NERVE.Gerbillinae: A subfamily of the Muridae consisting of several genera including Gerbillus, Rhombomys, Tatera, Meriones, and Psammomys.Inferior Colliculi: The posterior pair of the quadrigeminal bodies which contain centers for auditory function.Auditory Perception: The process whereby auditory stimuli are selected, organized, and interpreted by the organism.Ear, Middle: The space and structures directly internal to the TYMPANIC MEMBRANE and external to the inner ear (LABYRINTH). Its major components include the AUDITORY OSSICLES and the EUSTACHIAN TUBE that connects the cavity of middle ear (tympanic cavity) to the upper part of the throat.Otolaryngology: A surgical specialty concerned with the study and treatment of disorders of the ear, nose, and throat.Neurotology: A subspecialty of otolaryngology dealing with the parts of the nervous system related to the ear.Surgery, Plastic: The branch of surgery concerned with restoration, reconstruction, or improvement of defective, damaged, or missing structures.Periodicals as Topic: A publication issued at stated, more or less regular, intervals.Otorhinolaryngologic Diseases: Pathological processes of the ear, the nose, and the throat, also known as the ENT diseases.Otorhinolaryngologic Surgical Procedures: Surgery performed on the ear and its parts, the nose and nasal cavity, or the throat, including surgery of the adenoids, tonsils, pharynx, and trachea.Meniere Disease: A disease of the inner ear (LABYRINTH) that is characterized by fluctuating SENSORINEURAL HEARING LOSS; TINNITUS; episodic VERTIGO; and aural fullness. It is the most common form of endolymphatic hydrops.Access to Information: Individual's rights to obtain and use information collected or generated by others.Cochlear Nucleus: The brain stem nucleus that receives the central input from the cochlear nerve. The cochlear nucleus is located lateral and dorsolateral to the inferior cerebellar peduncles and is functionally divided into dorsal and ventral parts. It is tonotopically organized, performs the first stage of central auditory processing, and projects (directly or indirectly) to higher auditory areas including the superior olivary nuclei, the medial geniculi, the inferior colliculi, and the auditory cortex.Gymnotiformes: An order of neotropical electric fish found chiefly in the waters of South America. They continually emit weak electric discharges, which they use in object location and communication. A most popular species of research interest is the electric eel, ELECTROPHORUS electricus.Electric Fish: Fishes which generate an electric discharge. The voltage of the discharge varies from weak to strong in various groups of fish. The ELECTRIC ORGAN and electroplax are of prime interest in this group. They occur in more than one family.Retinal Ganglion Cells: Neurons of the innermost layer of the retina, the internal plexiform layer. They are of variable sizes and shapes, and their axons project via the OPTIC NERVE to the brain. A small subset of these cells act as photoreceptors with projections to the SUPRACHIASMATIC NUCLEUS, the center for regulating CIRCADIAN RHYTHM.Cochlear Nerve: The cochlear part of the 8th cranial nerve (VESTIBULOCOCHLEAR NERVE). The cochlear nerve fibers originate from neurons of the SPIRAL GANGLION and project peripherally to cochlear hair cells and centrally to the cochlear nuclei (COCHLEAR NUCLEUS) of the BRAIN STEM. They mediate the sense of hearing.Electric Organ: In about 250 species of electric fishes, modified muscle fibers forming disklike multinucleate plates arranged in stacks like batteries in series and embedded in a gelatinous matrix. A large torpedo ray may have half a million plates. Muscles in different parts of the body may be modified, i.e., the trunk and tail in the electric eel, the hyobranchial apparatus in the electric ray, and extrinsic eye muscles in the stargazers. Powerful electric organs emit pulses in brief bursts several times a second. They serve to stun prey and ward off predators. A large torpedo ray can produce of shock of more than 200 volts, capable of stunning a human. (Storer et al., General Zoology, 6th ed, p672)Noise: Any sound which is unwanted or interferes with HEARING other sounds.Greek World: A historical and cultural entity dispersed across a wide geographical area under the influence of Greek civilization, culture, and science. The Greek Empire extended from the Greek mainland and the Aegean islands from the 16th century B.C., to the Indus Valley in the 4th century under Alexander the Great, and to southern Italy and Sicily. Greek medicine began with Homeric and Aesculapian medicine and continued unbroken to Hippocrates (480-355 B.C.). The classic period of Greek medicine was 460-136 B.C. and the Graeco-Roman period, 156 B.C.-576 A.D. (From A. Castiglioni, A History of Medicine, 2d ed; from F. H. Garrison, An Introduction to the History of Medicine, 4th ed)Vestibulocochlear Nerve: The 8th cranial nerve. The vestibulocochlear nerve has a cochlear part (COCHLEAR NERVE) which is concerned with hearing and a vestibular part (VESTIBULAR NERVE) which mediates the sense of balance and head position. The fibers of the cochlear nerve originate from neurons of the SPIRAL GANGLION and project to the cochlear nuclei (COCHLEAR NUCLEUS). The fibers of the vestibular nerve arise from neurons of Scarpa's ganglion and project to the VESTIBULAR NUCLEI.Olivary Nucleus: A part of the MEDULLA OBLONGATA situated in the olivary body. It is involved with motor control and is a major source of sensory input to the CEREBELLUM.Dromaiidae: A family of flightless, running BIRDS, in the order Casuariiformes. The emu is the only surviving member of the family. They naturally inhabit forests, open plains, and grasslands in Australia.Feedback: A mechanism of communication within a system in that the input signal generates an output response which returns to influence the continued activity or productivity of that system.Strigiformes: An order of BIRDS with the common name owls characterized by strongly hooked beaks, sharp talons, large heads, forward facing eyes, and facial disks. While considered nocturnal RAPTORS, some owls do hunt by day.Feedback, Physiological: A mechanism of communication with a physiological system for homeostasis, adaptation, etc. Physiological feedback is mediated through extensive feedback mechanisms that use physiological cues as feedback loop signals to control other systems.Nonverbal Communication: Transmission of emotions, ideas, and attitudes between individuals in ways other than the spoken language.Child Development Disorders, Pervasive: Severe distortions in the development of many basic psychological functions that are not normal for any stage in development. These distortions are manifested in sustained social impairment, speech abnormalities, and peculiar motor movements.Autistic Disorder: A disorder beginning in childhood. It is marked by the presence of markedly abnormal or impaired development in social interaction and communication and a markedly restricted repertoire of activity and interest. Manifestations of the disorder vary greatly depending on the developmental level and chronological age of the individual. (DSM-V)Projection: A defense mechanism, operating unconsciously, whereby that which is emotionally unacceptable in the self is rejected and attributed (projected) to others.Communication Disorders: Disorders of verbal and nonverbal communication caused by receptive or expressive LANGUAGE DISORDERS, cognitive dysfunction (e.g., MENTAL RETARDATION), psychiatric conditions, and HEARING DISORDERS.Brain: The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.Asperger Syndrome: A disorder beginning in childhood whose essential features are persistent impairment in reciprocal social communication and social interaction, and restricted, repetitive patterns of behavior, interests, or activities. These symptoms may limit or impair everyday functioning. (From DSM-5)Stereotyped Behavior: Relatively invariant mode of behavior elicited or determined by a particular situation; may be verbal, postural, or expressive.Social Behavior: Any behavior caused by or affecting another individual, usually of the same species.Positron-Emission Tomography: An imaging technique using compounds labelled with short-lived positron-emitting radionuclides (such as carbon-11, nitrogen-13, oxygen-15 and fluorine-18) to measure cell metabolism. It has been useful in study of soft tissues such as CANCER; CARDIOVASCULAR SYSTEM; and brain. SINGLE-PHOTON EMISSION-COMPUTED TOMOGRAPHY is closely related to positron emission tomography, but uses isotopes with longer half-lives and resolution is lower.Deafness: A general term for the complete loss of the ability to hear from both ears.Speech Perception: The process whereby an utterance is decoded into a representation in terms of linguistic units (sequences of phonetic segments which combine to form lexical and grammatical morphemes).Correction of Hearing Impairment: Procedures for correcting HEARING DISORDERS.Hearing Loss, Bilateral: Partial hearing loss in both ears.Persons With Hearing Impairments: Persons with any degree of loss of hearing that has an impact on their activities of daily living or that requires special assistance or intervention.Expert Systems: Computer programs based on knowledge developed from consultation with experts on a problem, and the processing and/or formalizing of this knowledge using these programs in such a manner that the problems may be solved.Algorithms: A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Telemetry: Transmission of the readings of instruments to a remote location by means of wires, radio waves, or other means. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)National Socialism: The doctrines and policies of the Nazis or the National Social German Workers party, which ruled Germany under Adolf Hitler from 1933-1945. These doctrines and policies included racist nationalism, expansionism, and state control of the economy. (from Columbia Encyclopedia, 6th ed. and American Heritage College Dictionary, 3d ed.)Magnetic Resonance Imaging: Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.Brain Mapping: Imaging techniques used to colocalize sites of brain functions or physiological activity with brain structures.Electric Stimulation: Use of electric potential or currents to elicit biological responses.Photic Stimulation: Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity.Ossicular Prosthesis: An implant used to replace one or more of the ear ossicles. They are usually made of plastic, Gelfoam, ceramic, or stainless steel.Hearing Loss, Mixed Conductive-Sensorineural: Hearing loss due to damage or impairment of both the conductive elements (HEARING LOSS, CONDUCTIVE) and the sensorineural elements (HEARING LOSS, SENSORINEURAL) of the ear.Drug Implants: Small containers or pellets of a solid drug implanted in the body to achieve sustained release of the drug.
(1/6631) Effect of morphine and naloxone on priming-induced audiogenic seizures in BALB/c mice.

1 Morphine (1-200 mg/kg s.c.) reduced the incidence and prolonged the latency of priming-induced audiogenic siezures in a dose-dependent manner. 2 This effect was reversed by naloxone (1 and 2 mg/kg) although naloxone was itself inactive. 3 This priming-induces seizure model may be useful in the study of tolerance and physical dependence.  (+info)

(2/6631) The functional anatomy of the normal human auditory system: responses to 0.5 and 4.0 kHz tones at varied intensities.

Most functional imaging studies of the auditory system have employed complex stimuli. We used positron emission tomography to map neural responses to 0.5 and 4.0 kHz sine-wave tones presented to the right ear at 30, 50, 70 and 90 dB HL and found activation in a complex neural network of elements traditionally associated with the auditory system as well as non-traditional sites such as the posterior cingulate cortex. Cingulate activity was maximal at low stimulus intensities, suggesting that it may function as a gain control center. In the right temporal lobe, the location of the maximal response varied with the intensity, but not with the frequency of the stimuli. In the left temporal lobe, there was evidence for tonotopic organization: a site lateral to the left primary auditory cortex was activated equally by both tones while a second site in primary auditory cortex was more responsive to the higher frequency. Infratentorial activations were contralateral to the stimulated ear and included the lateral cerebellum, the lateral pontine tegmentum, the midbrain and the medial geniculate. Contrary to predictions based on cochlear membrane mechanics, at each intensity, 4.0 kHz stimuli were more potent activators of the brain than the 0.5 kHz stimuli.  (+info)

(3/6631) The effects of d-amphetamine on the temporal control of operant responding in rats during a preshock stimulus.

The operant behavior of six rats was maintained by a random-interval schedule of reinforcement. Three-minute periods of noise were superimposed on this behavior, each period ending with the delivery of an unavoidable shock. Overall rates of responding were generally lower during the periods of noise than in its absence (conditioned suppression). These suppressed response rates also exhibited temporal patterning, with responding becoming less frequent as each noise period progressed. The effects of d-amphetamine on this behavioral baseline were then assessed. In four animals the relative response rates during the noise and in its absence suggested that the drug produced a dose-related decrease in the amount of conditioned suppression. However, this effect was often due to a decrease in the rates of responding in the absence of the preshock stimulus, rather than to an increase in response rates during the stimulus. Temporal patterning in response rates during the preshock stimulus was abolished, an effect that was interpreted in terms of rate-dependent effect of d-amphetamine. This study thus extends rate-dependent analyses of the effects of amphetamines to the patterns of operant behavior that occur during a preshock stimulus, and which have been discussed in terms of the disrupting effects of anxiety on operant behavior.  (+info)

(4/6631) Midbrain combinatorial code for temporal and spectral information in concurrent acoustic signals.

All vocal species, including humans, often encounter simultaneous (concurrent) vocal signals from conspecifics. To segregate concurrent signals, the auditory system must extract information regarding the individual signals from their summed waveforms. During the breeding season, nesting male midshipman fish (Porichthys notatus) congregate in localized regions of the intertidal zone and produce long-duration (>1 min), multi-harmonic signals ("hums") during courtship of females. The hums of neighboring males often overlap, resulting in acoustic beats with amplitude and phase modulations at the difference frequencies (dFs) between their fundamental frequencies (F0s) and harmonic components. Behavioral studies also show that midshipman can localize a single hum-like tone when presented with a choice between two concurrent tones that originate from separate speakers. A previous study of the neural mechanisms underlying the segregation of concurrent signals demonstrated that midbrain neurons temporally encode a beat's dF through spike synchronization; however, spectral information about at least one of the beat's components is also required for signal segregation. Here we examine the encoding of spectral differences in beat signals by midbrain neurons. The results show that, although the spike rate responses of many neurons are sensitive to the spectral composition of a beat, virtually all midbrain units can encode information about differences in the spectral composition of beat stimuli via their interspike intervals (ISIs) with an equal distribution of ISI spectral sensitivity across the behaviorally relevant dFs. Together, temporal encoding in the midbrain of dF information through spike synchronization and of spectral information through ISI could permit the segregation of concurrent vocal signals.  (+info)

(5/6631) Desynchronizing responses to correlated noise: A mechanism for binaural masking level differences at the inferior colliculus.

We examined the adequacy of decorrelation of the responses to dichotic noise as an explanation for the binaural masking level difference (BMLD). The responses of 48 low-frequency neurons in the inferior colliculus of anesthetized guinea pigs were recorded to binaurally presented noise with various degrees of interaural correlation and to interaurally correlated noise in the presence of 500-Hz tones in either zero or pi interaural phase. In response to fully correlated noise, neurons' responses were modulated with interaural delay, showing quasiperiodic noise delay functions (NDFs) with a central peak and side peaks, separated by intervals roughly equivalent to the period of the neuron's best frequency. For noise with zero interaural correlation (independent noises presented to each ear), neurons were insensitive to the interaural delay. Their NDFs were unmodulated, with the majority showing a level of activity approximately equal to the mean of the peaks and troughs of the NDF obtained with fully correlated noise. Partial decorrelation of the noise resulted in NDFs that were, in general, intermediate between the fully correlated and fully decorrelated noise. Presenting 500-Hz tones simultaneously with fully correlated noise also had the effect of demodulating the NDFs. In the case of tones with zero interaural phase, this demodulation appeared to be a saturation process, raising the discharge at all noise delays to that at the largest peak in the NDF. In the majority of neurons, presenting the tones in pi phase had a similar effect on the NDFs to decorrelating the noise; the response was demodulated toward the mean of the peaks and troughs of the NDF. Thus the effect of added tones on the responses of delay-sensitive inferior colliculus neurons to noise could be accounted for by a desynchronizing effect. This result is entirely consistent with cross-correlation models of the BMLD. However, in some neurons, the effects of an added tone on the NDF appeared more extreme than the effect of decorrelating the noise, suggesting the possibility of additional inhibitory influences.  (+info)

(6/6631) Corticofugal amplification of facilitative auditory responses of subcortical combination-sensitive neurons in the mustached bat.

Recent studies on the bat's auditory system indicate that the corticofugal system mediates a highly focused positive feedback to physiologically "matched" subcortical neurons, and widespread lateral inhibition to physiologically "unmatched" subcortical neurons, to adjust and improve information processing. These findings have solved the controversy in physiological data, accumulated since 1962, of corticofugal effects on subcortical auditory neurons: inhibitory, excitatory, or both (an inhibitory effect is much more frequent than an excitatory effect). In the mustached bat, Pteronotus parnellii parnellii, the inferior colliculus, medial geniculate body, and auditory cortex each have "FM-FM" neurons, which are "combination-sensitive" and are tuned to specific time delays (echo delays) of echo FM components from the FM components of an emitted biosonar pulse. FM-FM neurons are more complex in response properties than cortical neurons which primarily respond to single tones. In the present study, we found that inactivation of the entire FM-FM area in the cortex, including neurons both physiologically matched and unmatched with subcortical FM-FM neurons, on the average reduced the facilitative responses to paired FM sounds by 82% for thalamic FM-FM neurons and by 66% for collicular FM-FM neurons. The corticofugal influence on the facilitative responses of subcortical combination-sensitive neurons is much larger than that on the excitatory responses of subcortical neurons primarily responding to single tones. Therefore we propose the hypothesis that, in general, the processing of complex sounds by combination-sensitive neurons more heavily depends on the corticofugal system than that by single-tone sensitive neurons.  (+info)

(7/6631) Effects of chronic administration of kanamycin on conditioned suppression to auditory stimulus in rats.

The conditioned suppression technique was employed to study the ototoxic effects of chronic administration of the antibiotic, kanamycin. Lever pressing behavior for food reinforcement of rats was suppressed in the presence of an auditory stimulus (sound) or visual stimulus (light) that had been previously paired with electric shocks. Repeated administration of kanamycin at the dose of 400 mg/kg/day for more than 50 days significantly attenuated the conditioned suppression to auditory stimulus but did not attenuate the conditioned suppression to visual stimulus. This finding suggests that the attenuating effect of chronic administration of kanamycin on conditioned suppression to auditory stimulus can be interpreted in terms of the selective action of the drug on the auditory system.  (+info)

(8/6631) Blockade of N-methyl-D-aspartate receptor activation suppresses learning-induced synaptic elimination.

Auditory filial imprinting in the domestic chicken is accompanied by a dramatic loss of spine synapses in two higher associative forebrain areas, the mediorostral neostriatum/hyperstriatum ventrale (MNH) and the dorsocaudal neostriatum (Ndc). The cellular mechanisms that underlie this learning-induced synaptic reorganization are unclear. We found that local pharmacological blockade of N-methyl-D-aspartate (NMDA) receptors in the MNH, a manipulation that has been shown previously to impair auditory imprinting, suppresses the learning-induced spine reduction in this region. Chicks treated with the NMDA receptor antagonist 2-amino-5-phosphonovaleric acid (APV) during the behavioral training for imprinting (postnatal day 0-2) displayed similar spine frequencies at postnatal day 7 as naive control animals, which, in both groups, were significantly higher than in imprinted animals. Because the average dendritic length did not differ between the experimental groups, the reduced spine frequency can be interpreted as a reduction of the total number of spine synapses per neuron. In the Ndc, which is reciprocally connected with the MNH and not directly influenced by the injected drug, learning-induced spine elimination was partly suppressed. Spine frequencies of the APV-treated, behaviorally trained but nonimprinted animals were higher than in the imprinted animals but lower than in the naive animals. These results provide evidence that NMDA receptor activation is required for the learning-induced selective reduction of spine synapses, which may serve as a mechanism of information storage specific for juvenile emotional learning events.  (+info)

*  Electric acoustic stimulation
... above 1 kHz can be beyond the range of amplification possible via acoustic stimulation. Electric stimulation (CI), on the other ... Electric acoustic stimulation (EAS) is the use of a hearing aid and a cochlear implant together in the same ear. The hearing ... This acoustic stimulation proves to be particularly effective in the low frequencies, though a severe hearing loss (> 70 dB HL ... Gstoettner W., Helbig S., Maier N., Kiefer J., Radeloff A., Adunka O. (2006). Ipsilateral Electric Acoustic Stimulation of the ...
*  Neuroprosthetics
Electric-acoustic stimulation of the auditory system. ORL 61:334-340. B. J. Gantz, C. Turner, and K. E. Gfeller, "Acoustic plus ... The concept of combining simultaneous electric-acoustic stimulation (EAS) for the purposes of better hearing was first ... The stimulation can also be done anywhere along the optic signal's path way. The optical nerve can be stimulated in order to ... Sacral nerve stimulation for treatment of refractory urinary urge incontinence. Sacral nerve study group. J Urol 1999 Aug;16(2 ...
*  Prepulse inhibition
Hoffman, H. S; Fleshler, M (1963). "Startle Reaction: Modification by Background Acoustic Stimulation". Science. 141 (3584): ... A burst of white noise is usually used as the acoustic startle stimulus. Typical durations are 20 ms for prepulse and 40 ms for ... Swerdlow, N R; Paulsen, J; Braff, D L; Butters, N; Geyer, M A; Swenson, M R (1995). "Impaired prepulse inhibition of acoustic ... Filion, Diane L; Dawson, Michael E; Schell, Anne M (1993). "Modification of the acoustic startle-reflex eyeblink: A tool for ...
*  Biophysical profile
Pinette MG, Blackstone J, Wax JR, Cartin A (June 2005). "Using fetal acoustic stimulation to shorten the biophysical profile". ... Fetal heart rate Fetal breathing Fetal movement Fetal tone Amniotic fluid volume Use of vibroacoustic stimulation to accelerate ...
*  Volley theory
Hilali, S.; Whitfield, I. C. (October 1953). "Responses of the trapezoid body to acoustic stimulation with pure tones". The ... which had varying phases according to stimulation frequency. This phenomenon was interpreted as the result of a second harmonic ...
*  Prenatal memory
Visser, G.H.A.; Mulder, H.H.; Wit, H.P.; Mulder, E.J.H.; Prechtl, H.F.R. (1989). "Vibro-acoustic stimulation of the human fetus ... Vibroacoustic stimulation is a technique involving the repetitive stimulation of the fetus, by applying a vibroacoustic ... Stimulation trials continue into the neonatal period (first 28 days after birth) by presenting the same auditory stimulus, to ... Both auditory and vibroacoustic stimulation have been used in habituation. ...
*  Endaural phenomena
... are sounds that are heard without any external acoustic stimulation. Endaural means "in the ear". Phenomena ...
*  Vestibular evoked myogenic potential
Townsend GL, Cody DTR (1971). The averaged inion response evoked by acoustic stimulation: its relation to the saccule. Ann Otol ... Rosengren SM, Todd NPM, Colebatch JG (2005). Vestibular-evoked extraocular potentials produced by stimulation with bone- ... bone vibration and short duration electrical stimulation. It is likely that both air-conducted and bone-conducted stimuli ... Vestibulocollic reflexes evoked by short-duration galvanic stimulation in man. J Physiol 513(2):587-97. Curthoys IS, Kim J, ...
*  Olivocochlear system
... following acoustic stimulation. Using acoustic stimuli to activate the MOC reflex pathway, recordings have been made from ... Cody and Johnstone (1982) and Rajan and Johnstone (1988a; 1988b) showed that constant acoustic stimulation (which evokes a ... Acoustic stimulation of the inner hair cells sends a neural signal to the posteroventral cochlear nucleus (PVCN), and the axons ... electrical stimulation of neurons other than MOCS fibres. Therefore, electrical stimulation of the MOCS may not give an ...
*  Nonstress test
... a comparison of fetal acoustic stimulation with acid-base determinations". Am J Obstet Gynecol. 155: 726-728. doi:10.1016/s0002 ... Vibroacoustic stimulation can wake the fetus, and is sometimes used to speed up the test or to facilitate further evaluation of ...
*  Henryk Skarżyński
Electric Acoustic Stimulation in Children W: Van de Heyning P, Kleine Punte A (eds): Cochlear Implants and Hearing Preservation ...
*  Phonemic restoration effect
Phonemic Restoration with Simulations of Cochlear Implants and Combined Electric-Acoustic Stimulation". Journal of the ... It is believed that humans and other vertebrates have evolved the ability to complete acoustic signals that are critical but ... "Dynamic cortical representations of perceptual fulling-in for missing acoustic rhythm". Scientific Reports. 7 (1): 17536. doi: ...
*  Otolith
In humans vestibular evoked myogenic potentials occur in response to loud, low frequency acoustic stimulation in patients with ... There is evidence that the vestibular system of mammals has retained some of its ancestral acoustic sensitivity and that this ... response to an elicited acoustic startle reflex is larger in the presence of loud, low frequency sounds that are below the ... In mice sensation of acoustic information via the vestibular system has been demonstrated to have a behaviourally relevant ...
*  MED-EL
These include cochlear implants, middle ear implants, bone conduction hearing implants, electric acoustic stimulation hearing ...
*  GIPC3
Besides their hearing impairment, Black Swiss mice also are hypersensitive to acoustic stimulation, reacting with seizures ( ... GIPC3 is thought to be important for acoustic signal acquisition and propagation in hair cells of the mammalian cochlea. The ...
*  Nocturnality
"Studies of the neural basis of evasive flight behavior in response to acoustic stimulation in Heliothis zea (Lepidoptera: ...
*  EAS
... an American organization in analytical chemistry Electric acoustic stimulation, hearing aid and a cochlear implant in the same ...
*  List of MeSH codes (E02)
... acoustic stimulation MeSH E02.190.888.061 --- aromatherapy MeSH E02.190.888.124 --- art therapy MeSH E02.190.888.249 --- color ... transcutaneous electric nerve stimulation MeSH E02.779.480.500 --- motion therapy, continuous passive MeSH E02.779.496.020 --- ...
*  Vibroacoustic stimulation
... (VAS), sometimes referred to as fetal vibroacoustic stimulation or fetal acoustic stimulation test ( ... "Vibroacoustic stimulation for fetal assessment in labour in the presence of a nonreassuring fetal heart rate trace". The ... Vibroacoustic stimulation is typically used during a nonstress test (NST). In 2013, the Cochrane Database of Systematic Reviews ... "Fetal vibroacoustic stimulation for facilitation of tests of fetal wellbeing". The Cochrane Library. 12: CD002963. doi:10.1002/ ...
*  Sergey Kravkov (psychologist)
96-103 Kravkov S. V. The influence of acoustic stimulation upon the colour sensibility of a protanopic eye /Аcta ... 379-398 Kravkov S. V. Changes of visual acuity in one eye under the influence of the illumination of the other or of acoustic ... 348-360 Kravkov S.V. Effect of indirect light stimulation as a function of the intensity of a direct stimulus / Acta ...
*  Tectorial membrane
... the sensory inner hair cells and electrically-motile outer hair cells of the organ of Corti and during acoustic stimulation ...
*  Cochlear implant
Auditory brainstem implant Bone-anchored hearing aid Bone conduction Brain implant Ear trumpet Electric Acoustic Stimulation ...
*  Startle response
"A primary acoustic startle circuit: lesion and stimulation studies" (Free full text). Journal of Neuroscience. 2 (6): 791-805. ... The acoustic startle reflex is thought to be caused by an auditory stimulus greater than 80 decibels. The reflex is typically ... A reflex from hearing a sudden loud noise will happen in the primary acoustic startle reflex pathway consisting of three main ... The role of the BNST in the acoustic startle reflex may be attributed to specific areas within the nucleus responsible for ...
*  Auricular branch of vagus nerve
Physical stimulation of the external acoustic meatus innervated by the auricular nerve elicits a cough, much like the other ... Wang Z, Zhou X, Sheng X, Yu L, Jiang H (2015). "Unilateral low-level transcutaneous electrical vagus nerve stimulation: A novel ... published "Far field potentials from the brain stem after transcutaneous vagus nerve stimulation" and in 2007 Kraus et al. did ... Rarely, on introduction of speculum in the external ear, patients have experienced syncope due to the stimulation of the ...
*  Audiometry
... and an electronic recording device to measure nystagmus evoked by procedures such as caloric stimulation of the ear Acoustic ... Tympanometry Acoustic reflex thresholds (ART) Acoustic reflectometry wide-band absorbance audiometry also called 3D ... Caloric stimulation/reflex test uses temperature difference between hot and cold water or air delivered into the ear to test ... Caloric stimulation of the ear results in rapid side-to-side eye movements called nystagmus. Absence of nystagmus may indicate ...
*  Xingolati
Slightly Stoopid Acoustic, Particle, Tea Leaf Green, The Everyone Orchestra, Banyan, DJ Greyboy, R.E.D. featuring Rob Wasserman ... STIMULATION. ...
BACKGROUND: Self-reported hearing measures are useful for surveying hearing loss in a population because they are short, and easy to administer by either questionnaire or telephone. This study aims to assess the performance of several self-reported hearing measures to identify hearing loss in a group of Iowa farmers. METHODS: The study subjects were 98 male farmers who participated in the Iowa Fa
Conductive Hearing Loss:. This type of hearing loss is caused by problems in the ear canal and/or the structures in the middle ear. It occurs when sounds from the outside world cannot be transmitted normally through the ear canal and/or middle ear to the inner ear. The most common causes of conductive hearing loss can be a buildup of wax in the ear canal, a perforated eardrum, fluid in the middle ear (common in children), or damaged or defective ossicles (middle ear bones). A person with conductive hearing loss may notice their ears seem to be full or plugged. Most conductive hearing losses can be medically or surgically treated. If for some reason the hearing loss cannot be corrected, hearing instruments can provide benefit.. Sensorineural Hearing Loss:. This type of hearing loss is the most common type of hearing loss. More than 90 percent of all hearing instrument wearers have sensorineural hearing loss, resulting from problems in the inner ear or the auditory nerve. Inner ear hair cell ...
Background: Mutations in GJB2 are the most common molecular defects responsible for autosomal recessive nonsyndromic hearing impairment (NSHI). The mutation spectra of this gene vary among different ethnic groups. Methods: In order to understand the spectrum and frequency of GJB2 mutations in the Chinese population, the coding region of the GJB2 gene from 2063 unrelated patients with NSHI was PCR amplified and sequenced. Results: A total of 23 pathogenic mutations were identified. Among them, five (p.W3X, c.99delT, c.155_c.158delTCTG, c.512_c.513insAACG, and p.Y152X) are novel. Three hundred and seven patients carry two confirmed pathogenic mutations, including 178 homozygotes and 129 compound heterozygotes. One hundred twenty five patients carry only one mutant allele. Thus, GJB2 mutations account for 17.9% of the mutant alleles in 2063 NSHI patients. Overall, 92.6% (684/739) of the pathogenic mutations are frame-shift truncation or nonsense mutations. The four prevalent mutations; c.235delC, ...
Define conductive hearing loss. conductive hearing loss synonyms, conductive hearing loss pronunciation, conductive hearing loss translation, English dictionary definition of conductive hearing loss. Noun 1. conductive hearing loss - hearing loss due to problems with the bones of the middle ear conduction deafness, middle-ear deafness hearing disorder,...
Are you experiencing mild hearing loss? Are you the parent of a child who has glue ear?What causes a perforated eardrum? Do you want to know more about digital hearing aids?. If so then you have come to the right place. This complete guide to hearing loss will answer those questions and any others you may have about hearing loss.. This comprehensive yet easy to understand guide includes information about the types of hearing loss, the causes of hearing loss, treatment for hearing loss and future developments. Hearing loss varies according to the cause and the individual. One person may be lucky and only experience mild hearing loss whereas another may have a severe form. But some people are unfortunate enough to become completely deaf. Losing your hearing is distressing but it is treatable in the vast majority of cases. For example, the ear condition otitis media causes a build up of fluid in the middle ear which affects hearing ability but this returns to normal once it is treated.. The ...
Universal newborn hearing screening is becoming the standard of care in the United States. However, there has been some controversy around this pediatric preventive health care practice. In 2001, the US Preventative Services Task Force (USPSTF), the leading independent panel of experts on prevention and primary care in the United States, reviewed the scientific literature and found inconclusive evidence to recommend for or against universal newborn hearing screening. As a result of this lack of recommendation, some pediatric providers were not screening the hearing of all newborn infants. The USPSTF released an update in July 2008 concluding there is scientific evidence to recommend newborn hearing screening for all infants. Universal newborn hearing screening is the first step in the national Early Hearing Detection and Intervention (EHDI) program. EHDI includes not only universal newborn hearing screening but also diagnostic evaluation for any infant failing the initial hearing screen and ...
Sensorineural hearing loss is the most common type of hearing loss. More than 90 percent of all hearing aid wearers have sensorineural hearing loss. The most common causes of sensorineural hearing loss are age related changes and noise exposure. A sensorineural hearing loss may also result from disturbance of inner ear circulation, increased inner fluid pressure or from disturbances of nerve transmission. Sensorineural hearing loss is also called "cochlear loss," an "inner ear loss" and is also commonly called "nerve loss." Years ago, many professionals said there was nothing that could be done for sensorineural hearing loss that is totally incorrect today. There are many excellent options for the patient with sensorineural hearing loss ...
A good starting point for anyone thinking about how hearing loss relates to workers compensation is to understand the kinds of hearing loss. Hearing loss is divided into three types. Conductive hearing loss is caused by problems in the outer or middle ear that prevent some frequencies from reaching the inner ear, where sounds are converted into electrical signals that the brain interprets. Conductive hearing loss can be caused by things like ear infections, fluid from colds, or punctured ear drums. Exposure to loud noise doesnt cause conductive hearing loss. Work-related conductive hearing loss would need to involve something more than just noise: an object getting stuck in the outer ear, for example. Sensorineural hearing loss is the second type. It takes place in the inner ear and can be caused by aging, genetic predisposition, or illnesses. It can also be caused by exposure to loud noises, making it the more likely type of hearing loss to be covered by workers compensation. The third type ...
As the 2nd most common type of hearing loss, conductive hearing loss affects people of all ages and is often temporary and resolvable. Conductive hearing loss presents itself when there is some form of damage to the outer or middle ear, whether a blockage in the ear canal or a disorder in the middle-ear structures. Because sound waves arent able to travel effectively from the outer or middle ear to the inner ear, a person with conductive hearing loss usually experiences sounds as muffled or distant.. Conductive hearing loss differs from the most common type of hearing loss - sensorineural - in that while conductive hearing loss is primarily an acoustic conduction problem, sensorineural hearing loss is primarily an acoustic generation or perception problem. An individual with conductive loss hears sounds more quietly than they would normally, but an individual with sensorineural loss may hear things in a distorted manner as well.. ...
The journal of shahrekord university of Medical Sciences (JSKUMS) is biomonthly open to access online publication of Shahrekord University of Medical Sciences (Iran) and welcomes contributions from all areas of basic or clinical sciences. The Journal is fully peer-reviewed and publishes original contributions that have not been published previously. Abstracts presentations do not constitute previous publication. Full papers and short communications will be considered for publication and review articles, only by invitation or by investigators having 3 or more relevant publications. Acceptance of manuscripts for publication depends on their quality originality clarity and relevance to the journals scope.
By Seilesh Babu, M.D., Michigan Ear Institute. Hearing loss is one of the most common conditions affecting otology patients whether as a newborn or aging patient. Hearing loss can significantly impact ones ability to communicate leading to reduced quality of life, isolation, and even depression. Seeking medical help to assist with this hearing loss can be the biggest obstacle for many patients who do not want to acknowledge a hearing issue. However, if the problem is properly managed with hearing aid assistance or surgical therapy, improvement in the patients quality of life including anxiety, depression, frustration, and social isolation will be positively impacted.. In our practice at the Michigan Ear Institute, we see thousands of patients annually with hearing loss concerns in all age groups. Some of unilateral hearing loss and many have bilateral hearing loss, ranging from mild to profound. Unilateral hearing loss can be caused by not having an ear canal form (canal atresia) or, from ...
Conductive hearing loss and treatments - Conductive hearing loss is the second most common form of hearing loss. Sound is unable to get transmitted to the inner ear. Due to a variety of reasons. Your hearing problem may have come on suddenly or slowly progressed over time.. Some common causes of conductive hearing loss are, built up ear wax, foreign objects in your ear canal such as a small insect. This is especially common in small children. Other reasons may be from an ear infection, fluid in the inner ear, trauma to the ossicular chain such as temporal bone fracture, tumors of the middle ear, erosion of the ossicular chain and perforation of the tympanic membrane.. Swimmers ear is also a cause for sudden conductive hearing loss. If you are suffering from some form of infection it is advised that you visit your doctor for a prescription of antibiotics. If it is a mild infection you can treat yourself at home with natural remedies.. The good news is that most conductive hearing loss can be ...
You have some options if you think you have a hearing problem and are thinking about getting hearing aids. You can see your doctor or an audiologist and be fit for prescription hearing aids by a licensed hearing aid provider. But you might consider buying an over-the-counter (OTC) hearing aid.. If you choose to use an audiologist, he or she can help determine what type of hearing aid will work best for you. The audiologist will pick a hearing aid based on the type and how much hearing loss you have and other factors. He or she can help you learn how to get the most out of your hearing aids. In general, it usually is better to wear hearing aids in both ears, even if the hearing loss in the ears is not equal.. Prescription hearing aids need to be fitted by someone trained specifically in hearing problems. An audiologist or licensed hearing aid provider can make sure your hearing aids fit and work for your type and degree of hearing loss.. Over-the-counter hearing aids, which may be called personal ...
Each part of the ear has an important role in providing sound information to the brain. Hearing loss is caused by damage to one or more parts of the outer, middle or inner ear. In order to understand the hearing loss well, we need to understand the anatomy of the ear and the way of hearing. An overview of it will be described in the following explanation.. Hearing loss should always be diagnosed by a hearing doctor, such as an audiologist or an ENT specialist. They will test hearing to determine the type and extent of the damage. An audiogram, will illustrate the findings of the auditory test.. There are four types of hearing loss:. The first and most common type of sensorineural hearing loss is caused by the loss or destruction of nerve cells (hair cells) in the cochlea. Conductive hearing loss indicates a problem in the outer or middle ear that causes no sound to sound properly to the inner ear. Mixed hearing loss is a combination of sensorineural and conductive hearing loss. Finally, ...
Friday, March 28, 2014: MediaPlanet ran a feature on vision and hearing health in selected markets where HLAA Executive Director Anna Gilmore Hall wrote "Living Successfully with Hearing Loss," following a story about Derrick Coleman, the Seattle Seahawks fullback who has hearing loss. Anna wrote: Hearing loss is a major public health issue. About 20 percent of adults in the United States, 48 million, report some degree of hearing loss. Hearing loss impacts people of all ages and professions. It is the third most common physical condition after arthritis and heart disease. However, there is good news. There are tools and resources that can help you and your family live successfully with hearing loss. Yes, your family - because hearing loss impacts not only the individual with hearing loss, but the entire family.. Read the full article on the web or PDF.. Vision & Hearing Health - Mediaplanet Digital Campaign. ...
There is a link between hearing loss and Alzheimers disease, according to a study by researchers at Johns Hopkins Medicine. Dr. Frank Lin and his team followed more than 600 people for nearly 12 years. The participants degree of hearing loss paralleled their risk of later developing dementia or Alzheimers disease. For each 10-decibel loss in hearing, the risk of dementia increased about 20 percent. In other words, the risk doubled with mild hearing loss, tripled with moderate hearing loss, and soared fivefold among those with severe hearing loss. Lin speculates that the brain is overstressed by trying to pick up what it is missing. By devoting more of its resources to hearing, the brain neglects other functions. Social isolation may contribute to a greater risk of age-related disorders as well, according to Dr. Lin. The unanswered question from his research is whether improved hearing through the use of cochlear implants and hearing aids, or improved communication through learning sign ...
There are different types of hearing loss including conductive hearing loss, sensorineural hearing loss and mixed hearing loss.. Conductive hearing loss - caused by any condition or disease that impedes the conveyance of sound in its mechanical form through the middle ear cavity to the inner ear. This results in reduction of intensity (loudness), so the energy reaching the inner ear is lower or less intense than originally intended.. Sensorineural hearing loss - caused by inner ear or auditory nerve dysfunction. This may result from an inability of the hair cells to stimulate the nerves of hearing or a metabolic problem in the fluids of the inner ear. It can also result from damage to the inner ear organs.. Mixed hearing loss - a combination of the above 2 types, where in addition to some irreversible hearing loss caused by an inner ear or auditory nerve disorder, there is also a dysfunction of the middle ear mechanism that makes the hearing worse than the sensorineural loss alone.. Location ...
Hearing loss specialists help patients with hearing tests, hearing consultations, hearing loss diagnosis and more. See below for hearing loss specialists in Little Rock that give access to hearing loss treatments such as wax blockage removal, hearing aids and cochlear implants, as well as advice and content on hearing loss prevention.
Purpose. To examine how road users with different degree of hearing loss experience safety and mobility in transport situations, compared to road users with normal hearing.. Methods. A questionnaire study was conducted with participants recruited from the local branch of The Swedish hard of hearing society. A normal hearing control group, matched on age, gender and geographical location, was selected from a commercial database. The response rate was 35 % (n = 194) in the group with Hearing Loss (HL) and 42 % (n = 125) in the group with Normal Hearing (NH). The individuals with hearing loss were grouped into four groups according to the degree of their hearing loss (mild, moderate, severe and profound).. Results. Hearing loss affected some specific aspects regarding transport situations, while others remained unaffected. Individuals with hearing loss were not as likely to have a driving license, but for those who have, hearing loss had no effect on mileage per year. Loss of hearing had an effect ...
There are many other descriptors associated with hearing loss. Below are a few common terms:. Bilateral Hearing Loss refers to a hearing loss that occurs in both ears.. Unilateral Hearing Loss refers to a hearing loss that presents in only one ear. In some cases unilateral hearing loss may be referred to as single-sided deafness.. Symmetrical Hearing Loss refers to a loss that is at the same level in both ears.. Asymmetrical Hearing Loss refers to a loss that presents at different levels in each ear.. Progressive Hearing Loss means that hearing loss becomes worse over time. An individual with progressive hearing loss may begin with a mild loss that progresses to moderate, severe or even profound over time.. Sudden Hearing Loss (also referred to as rapid onset or acute hearing loss) occurs without warning. Such a hearing loss requires immediate medical attention to determine its cause and treatment. In many cases, this type of hearing loss can be treated or even reversed ...
Hearing loss affects over 11 million people in the UK (1 in 6 of the population), and is expected to rise to 15.5 million by 2030 given the ageing population profile.1 If untreated, hearing loss can make communicating with others difficult, which may lead to social isolation and withdrawal, mental illness (eg, anxiety, depression), and reduced quality of life.2 ,3 Hearing loss is associated with an increased risk of dementia and mortality in older adults.4 ,5 Unemployment rates are higher in people with hearing loss, costing the UK an estimated £24.8 billion in lost economic output each year.6 Consequently, hearing impairment is a major public health concern, having a significant impact on the individual, significant others and to society more generally.. The most prevalent degree of hearing loss can be defined as mild-to-moderate, affecting 92% of all adults with hearing loss in the UK.1 Hearing sensitivity can be assessed according to pure-tone thresholds across five different octave ...
Nonsyndromic hearing impairment is one of the most heterogeneous hereditary conditions, with more than 40 loci mapped on the human genome, however, only a limited number of genes implicated in hearing loss have been identified. We previously reported linkage to chromosome 7p15 for autosomal dominant hearing impairment segregating in an extended Dutch family (DFNA5). Here, we report a further refinement of the DFNA5 candidate region and the isolation of a gene from this region that is expressed in the cochlea. In intron 7 of this gene, we identified an insertion/deletion mutation that does not affect intron-exon boundaries, but deletes five G-triplets at the 3 end of the intron. The mutation co-segregated with deafness in the family and causes skipping of exon 8, resulting in premature termination of the open reading frame. As no physiological function could be assigned, the gene was designated DFNA5.. ...
Looking for online definition of conductive hearing loss in the Medical Dictionary? conductive hearing loss explanation free. What is conductive hearing loss? Meaning of conductive hearing loss medical term. What does conductive hearing loss mean?
TY - JOUR. T1 - Genetic mutation susceptibility of hearing loss in child with severe neonatal jaundice. AU - Zahedi, Farah Dayana. AU - Roslenda, Abdul Rahman. AU - Ali, Adli. AU - Abdullah, Asma. PY - 2015/10/1. Y1 - 2015/10/1. N2 - We report a case of 5-year-old boy who had bilateral profound sensorineural hearing loss His other two elder brothers have bilateral sensorineural hearing loss and history of severe neonatal jaundice as well. CT scan and MRI revealed normal findings. Right sided cochlear implantation was done at the age of 3 and he is still under audiology follow-up.. AB - We report a case of 5-year-old boy who had bilateral profound sensorineural hearing loss His other two elder brothers have bilateral sensorineural hearing loss and history of severe neonatal jaundice as well. CT scan and MRI revealed normal findings. Right sided cochlear implantation was done at the age of 3 and he is still under audiology follow-up.. KW - Congenital. KW - Hearing loss. KW - ...
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An estimated 12.5% of children and adolescents aged 6-19 years (approximately 5.2 million) and 17% of adults aged 20-69 years (approximately 26 million) have suffered permanent damage to their hearing from excessive exposure to noise.3,4. Hearing loss can result from damage to structures and/or nerve fibers in the inner ear that respond to sound. This type of hearing loss, termed "noise-induced hearing loss," is usually caused by exposure to excessively loud sounds and cannot be medically or surgically corrected. Noise-induced hearing loss can result from a one-time exposure to a very loud sound, blast, or impulse, or from listening to loud sounds over an extended period.. ...
MYTH: Only loud music can cause hearing loss - Your profession may be just as risky as your hobbies when it comes to causing hearing loss. Industrial noise is a leading cause of Noise-Induced Hearing Loss. A recent study by the United States Center for Disease Control showed that miners are the most likely people to have this type of hearing loss, due to acoustic trauma from daily noise exposure underground ...
In the first few weeks of life your baby will have several routine health checks. One of these checks offered is a free newborn hearing screen. The hearing screen is performed prior to discharge from hospital by the midwife or designated screener and is most often performed at the babys bedside. South Australia uses Automated Auditory Brainstem Response (AABR) assessment to check the babys hearing status. This technology is a valid and reliable method of determining whether a baby has a significant hearing loss or not.. If a pass results is not obtained in one or both ears, a second AABR will be offered by your local Child and Family Health Nurse. If a pass results is not obtained following two valid hearing screens, further assessment by an audiologist is recommended. The Child and Family Health nurse will refer the child to the Universal Neonatal Hearing Screening Program for further assessment.. The aim of the hearing test is to get a complete picture of the babys hearing. Auditory ...
First, the audiologist will conduct an evaluation and explain to you the nature of your hearing loss. Then the audiologist will talk with you about your ability to use hearing aids.. Your audiologist will want to find out about your typical communication activities at home, at work, and in social and leisure activities. You are a very important partner in this discussion. Your answers will help to decide the type and style of hearing aid that is best for you. Your answers will also help in deciding what hearing aid features you need.. Once you and your audiologist have discussed your listening needs, he or she can recommend the hearing aid(s) that will best accommodate your needs. The audiologist will consider your hearing loss, communication needs, and budget in selecting your hearing aids.. Many audiologists offer group classes on adjusting to your new hearing aid. This gives you a chance to meet with new hearing aid users and learn how to best use your hearing aid. Sometimes experienced ...
OBJECTIVE: The immunosuppressive agent cyclosporin A (CsA) has contributed to the success of organ and bone marrow transplantation. CsA-related neurotoxicity is a well-known occurrence. Sensorineural hearing loss (SNHL) due to initiation of CsA treatment is an extremely rare finding. MATERIAL AND METHODS: A 32-year-old man who had undergone technically uneventful cadaveric renal transplantation for focal glomerulosclerosis when 25 years old was evaluated as the result of a 10-month history of bilateral hearing loss. The patient had been taking only CsA (150 mg twice daily) and methylprednisolone. RESULTS: Progressive bilateral SNHL was confirmed by an audiological examination. Eight months after dose reduction of CsA, pure-tone audiometry excluded progression of hearing loss. CONCLUSIONS: To the best of our knowledge, only rare cases of CsA-related hearing loss have been reported, and none after long-term CsA treatment. Audiological findings confirmed the cochlear origin of SNHL in our patient. ...
Local resource for noise-induced hearing loss treatment in Racine. Includes detailed information on local businesses that provide access to hearing aids, ENT doctors, audiologists, hearing tests and hearing specialists, as well as advice and content on hearing loss treatments and resources.
Description of disease Occupational hearing loss. Treatment Occupational hearing loss. Symptoms and causes Occupational hearing loss Prophylaxis Occupational hearing loss
Description of disease Occupational hearing loss. Treatment Occupational hearing loss. Symptoms and causes Occupational hearing loss Prophylaxis Occupational hearing loss
Despite the existence of an OSHA standard for hearing conservation, noise-induced hearing loss continues to be one of the most prevalent occupational conditions. Furthermore, hearing loss rates appear to vary significantly between industrial locations with similar measured noise exposure levels. The factors that determine an effective hearing conservation program remain poorly understood. The effective use of hearing protection, believed to be a critical component of such programs, is felt to be highly variable in real world situations. Provocative new data by our research group indicate that much of the preventable hearing loss in a large industrial workforce is occurring not among the workers in the highest ambient noise areas, but instead among employees working in areas where measured ambient median noise exposures are close to or even slightly below the current OSHA action level (85dBA for an 8 hour time weighted average). One possible reason could be that the use of hearing protection is ...
The present statement reviews the evidence for universal newborn hearing screening (UNHS). A systematic review of the literature was conducted using Medline and using search dates from 1996 to the third week of August 2009. The following search terms were used: neonatal screening AND hearing loss AND hearing disorders. The key phrase
Leptomeningeal carcinomatosis is a rare entity caused by metastases from solid tumors in the form of diffuse seeding to the leptomeninges. Lots of neurologic symptoms related to cerebrum, cerebellum, spinal root, and cranial nerves can be occurred in leptomeningeal carcinomatosis patients. It is not often that only bilateral hearing loss is present as the initial clinical symptom. In this report, we present a 54-year-old man represented with sudden bilateral hearing loss and vertigo who were operated for duodenal adenocarcinoma six months before. The clinical, radiologic, and cerebrospinal fluid cytologic features of the patient and the case reports of sudden hearing loss related to leptomeningeal carcinomatosis are discussed. ...
High dose sodium salicylate causes moderate, reversible hearing loss and tinnitus. Salicylate-induced hearing loss is believed to arise from a reduction in the electromotile response of outer hair cells (OHCs) and/or reduction of KCNQ4 potassium currents in OHCs which decreases the driving force for the transduction current. Therefore, enhancing OHC potassium currents could potentially prevent salicylate-induced temporary hearing loss. In this study, we tested whether opening voltage-gated potassium channels using ICA-105665, a novel small molecule that opens KCNQ2/3 and KCNQ3/5 channels, can reduce salicylate-induced hearing loss. We found that systemic application of ICA-105665 at 10 mg/kg prevented the salicylate-induced amplitude reduction and threshold shift in the compound action potentials recorded at the round window of the cochlea. ICA-105665 also prevented the salicylate-induced reduction of distortion products of otoacoustic emission (DPOAE). These results suggest that ICA-105665
In superior canal dehiscence syndrome, conductive hearing is better than normal. When combined with a sensorineural hearing loss, this pattern may look superficially like a conductive hearing loss, because there is an air-bone gap. The treatment of SCD may eliminate the air-bone gap. Practically, this is a very uncommon situation, of much more interest to diagnosticians than patients. In the Large Vestibular Aqueduct syndrome there is enlargement of the endolymphatic duct that connects the endolymphatic compartment to the endolymphatic sac (which lies just under the dura of the posterior fossa, ES above). Persons with LVAS may develop hearing loss as well as be unusually vulnerable to inner ear disease associated with head injury. Merchant et al (2007) have reported that conductive loss is common in LVAS, and that it has a mechanism similar to the conductive loss in SCD (see above). ...
Introduction: Hearing loss is fairly a common disorder which is usually treated with corticosteroids via systemic administration and/or intra-tympanic injection. This study aimed to compare the effectiveness of intra-tympanic injections of dexamethasone with its combination with hyaluronic acid in patients with sudden sensorineural hearing loss. Materials and Methods: In this clinical trial, 40 patients were randomly assigned to two groups; in the first group, 20 patients received 2.4 mg intra-tympanic dexamethasone, while in the second group patients received injections of 2.4 mg of dexamethasone plus 2 mg of hyaluronic acid in combination. Patients in both groups were injected every other day to a total of three injections. The hearing status of patients was evaluated by pure tone audiometry (bone conduction threshold) before and 2 weeks after the intervention. Results: Assessment of hearing threshold before and after treatment in the two groups showed a significant difference between hearing
Connexin 30 (Cx30), a member of the large gap junction protein family, plays a role in the homeostasis of the epidermis and inner ear through gap junctional intercellular communication (GJIC). Here, we investigated the underlying mechanisms of four autosomal dominant Cx30 gene mutations linked to hearing loss and/or various skin diseases. First, the T5M mutant linked to non-syndromic hearing loss formed functional gap junction channels and hemichannels, similar to wild type Cx30. The loss-of-function V37E mutant associated with Clouston syndrome or keratitis-ichthyosis-deafness syndrome was retained in the endoplasmic reticulum and significantly induced apoptosis. The G59R mutant linked to Vohwinkel and Bart-Pumphrey syndromes was retained primarily in the Golgi apparatus and exhibited loss of gap junction channel and hemichannel function, but did not cause cell death. Lastly, the A88V mutant related to Clouston syndrome also significantly induced apoptosis, although through an endoplasmic ...
TY - JOUR. T1 - Assessing Sensorineural Hearing Loss Using Various Transient-Evoked Otoacoustic Emission Stimulus Conditions. AU - Putterman, Daniel B.. AU - Keefe, Douglas H. AU - Hunter, Lisa L.. AU - Garinis, Angela C.. AU - Fitzpatrick, Denis F.. AU - McMillan, Garnett P.. AU - Feeney, M. Patrick. PY - 2017/1/1. Y1 - 2017/1/1. N2 - Objectives: An important clinical application of transient-evoked otoacoustic emissions (TEOAEs) is to evaluate cochlear outer hair cell function for the purpose of detecting sensorineural hearing loss (SNHL). Double-evoked TEOAEs were measured using a chirp stimulus, in which the stimuli had an extended frequency range compared to clinical tests. The present study compared TEOAEs recorded using an unweighted stimulus presented at either ambient pressure or tympanometric peak pressure (TPP) in the ear canal and TEOAEs recorded using a power-weighted stimulus at ambient pressure. The unweighted stimulus had approximately constant incident pressure magnitude across ...
Objective. Deferoxamine therapy in lifelong transfusion-dependent anaemias, as beta-thalassemia major, is associated with an increased risk of ototoxic changes. With increasing survival rates, prevention and/or early detection of ototoxicity are important for providing management options. The predictive value of pure-tone audiometry in early detection of ototoxicity has been questioned, particularly in the higher frequencies. Otoacoustic emissions appear to be more sensitive to cochlear insult than the conventional pure-tone audiometry. The aim of our study was to compare the efficacy of otoacoustic emissions (distortion-product otoacoustic emissions) with that of pure-tone audiometry as method of audiological monitoring ...
Hearing disorders are a common condition recognized in many breeds of dogs. In the dog breed Cavalier King Charles Spaniel (CKCS), hearing disorders may be due to conductive hearing loss, which may occur with primary secretory otitis media (PSOM), or do to sensorineural hearing loss, which may occur when there is damage or an abnormality of the sensory cells in the cochlea or the auditory nerve. Evaluation of a dogs hearing ability is done using the brain-stem auditory evoked response (BAER) test. However, in order to identify an abnormality on the BAER test, the results from an individual dog must be compared to normal BAER values. Inclusion criteria:. To qualify for enrollment in this study, dogs must:. ...
There are a number of NHCA members who provide consulting services, including guidance on developing hearing conservation programs and materials. In addition, NHCA has developed educational materials on hearing conservation, including a series of practical guides on hearing conservation topics. The NHCA website contains a searchable bibliography on hearing conservation-related materials (courtesy of Elliott Berger at E-A-R) which includes hundreds of useful articles on noise and hearing loss. The website also contains information on various hearing conservation regulatory requirements. NHCA has recently published an electronic series of Practical Guides on hearing conservation. NHCA is currently working to develop a model hearing conservation program for several industries, including construction.. ...
... (SSNHL) involves an acute unexplained hearing loss, nearly always unilateral, that occurs over less than a 72-hour period. Most cases are idiopathic, and the prognosis depends on the severity of the hearing loss.The
How Can Hearing Aids Help?. Hearing aid manufacturers have tried to address this problem with a technology called frequency -lowering. Hearing aids with this technology are able to capture high frequency sounds and shift them down into lower frequency regions, as opposed to just making the high frequency sounds louder. This means that high frequency sounds of speech can be heard at lower frequencies where hearing is typically better.. Many people appreciate frequency-lowering processing from the start, but some listeners go through an adjustment period. If you have not heard the /s/ sound in years, it can be hard to get used to hearing it again, especially when it is shifted to a lower frequency. Sometimes people report that frequency lowering initially makes talkers sound like they are lisping. After a few weeks of listening and adjusting to frequency-lowering, most people say that the lisp is gone and just the /s/ sound is left in its place. The amount of frequency-lowering and the loudness of ...
The diagnosis of auditory neuropathy is based on a certain pattern of results from a number of different hearing tests. Auditory Brainstem Response (ABR) and Otoacoustic Emission (OAE) results are used to find this condition. An ABR test uses small bandaid-type electrodes placed behind each ear and the head. Sounds are presented to the ears using miniature earphones. The electrodes pick up responses from the hearing nerve and estimate how the cochlea and hearing nerve are responding to sound. The OAE test uses a miniature earphone to present a series of tones to the ear. A sensitive microphone measures an echo response from the inner ear. This information estimates how the inner ear responds to sound. The most striking finding with auditory neuropathy is that Otoacoustic Emissions (OAEs) are normal. This means that hair cells in the inner ear are working normally. At the same time, ABR responses are absent or very abnormal. This shows poor responses from the hearing nerve. It appears that only a ...
A questionnaire assessing knowledge of hearing and hearing loss, and planned hearing conservation practices, was collected from 71 high school students before and after an educational hearing conservation program (HCP) consisting of a film, a lecture and a handout. An average increase of 16.7% correct responses from pre- to postexposure to the HCP was found. Moreover, substantial percentages of respondents stated that they now plan to use hearing protection devices and procedures, when appropriate, and about 80% stated they found the HCP helpful to them.
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Habitual exposure to noise above 85 dB will cause a gradual hearing loss in a significant number of individuals, and louder noises will accelerate this damage.. For unprotected ears, the allowed exposure time decreases by one-half for each 5 dB increase in the average noise level. For instance, exposure is limited to 8 hours at 90 dB, 4 hours at 95 dB, and 2 hours at 100 dB.. The highest permissible noise exposure for the unprotected ear is 115 dB for 15 minutes/day. Any noise above 140 dB is not permitted.. The Occupational Health and Safety Administration, in its Hearing Conservation Amendment of 1983, requires hearing conservation programs in noisy work places. This includes a yearly hearing test for the approximately 5 million workers exposed to an average of 85 dB or more of noise during an 8-hour work day.. Ideally, noisy machinery and work places should be engineered to be more quiet or the workers time in the noise should be reduced; however, the cost of these actions is often ...
Risk of Sensorineural Hearing Loss and Bilirubin Exchange Transfusion Thresholds. Pediatrics. 2015; 136(3):505-12 (ISSN: 1098-4275). Wickremasinghe AC; Risley RJ; Kuzniewicz MW; Wu YW; Walsh EM; Wi S; McCulloch CE; Newman TB ABSTRACT Risk of Sensorineural Hearing Loss and Bilirubin Exchange Transfusion Thresholds. Pediatrics. 2015; 136(3):505-12 (ISSN: 1098-4275). Wickremasinghe AC; Risley RJ; Kuzniewicz MW; Wu YW; Walsh EM; Wi S; McCulloch CE; Newman TB BACKGROUND AND OBJECTIVES: High bilirubin levels are associated with sensorineural…
Purpose To determine whether a single 51-minute exposure to acoustic noise during 3-T multisequence magnetic resonance (MR) neuroimaging could affect the hearing threshold of healthy adults with earplugs and sponge mats as hearing protection. Materials and Methods With earplugs and motion-refraining sponge mats as hearing protection, 26 healthy young adults underwent 3-T MR neuroimaging imaging that included T1-weighted three-dimensional gradient-echo sequence, T2-weighted fast spin-echo sequence, diffusion-tensor imaging, diffusion-kurtosis imaging, T2*-weighted three-dimensional multiecho gradient-echo sequence, and blood oxygen level-dependent imaging. Automated auditory brainstem response (ABR) was used to measure the hearing thresholds within 24 hours before, within 20 minutes after, and 25 days after the MR examination. One-way repeated-measure analysis of variance with Bonferroni adjustment was used to compare automated ABR results among the three tests and partial η(2) (ηp(2)) was ...
Sudden-onset unilateral sensorineural hearing loss has no effective treatment.The phenomenon of sudden-onset, unilateral sensorineural hearing loss (SSNHL) has
This page includes the following topics and synonyms: Newborn Hearing Screening, Hearing Testing in Newborns, Infant Hearing Testing, Auditory Brainstem-Evoked Response, Auditory Brainstem Response, Otoacoustic Emission, Transient Evoked Otoacoustic Emission, Auditory Brainstem Electric Response Audiometry.
Initial symptoms were reported and informally scored for impingement on a 10-point scale by the patient. The symptoms started with are a minor sore throat (2/10) and moderate aural fullness (6/10) in the right ear upon awakening in the morning. Within two days, a mild to severe, dramatically sloping, ultra-high frequency hearing loss with tinnitus in the right ear was recorded (Fig. 1), which was accompanied by the onset of loud tinnitus 24/7 with sound sensitivity (8/10). The tinnitus was initially measured at 55 dB at 9,000 Hz in the right ear, and at 20 dB at 8,000 Hz in the left ear (Note: The patient only complains of tinnitus and sound sensitivity in the right ear; tests of the left ear are used to compare the two ears).. At two weeks, tinnitus at 8,000 Hz is measured at 60 dB in the right ear and balanced to 55 dB in the left. The ULL measurements between 250 Hz and 16,000 Hz confirmed the presence of hyperacusis. Evidence of asymmetry showed the right ear is more sensitive (by 10-15 dB) ...
The American Academy of Audiology considers that developmental deficits in communication and behavioral/attention problems experienced by some children with recurrent otitis media are, for the most part, auditory-based. There is increasing evidence that the age of onset, as well as the nature, degree, and configuration of the peripheral conductive hearing loss which occurs secondary to otitis media, are critical components that place children at risk for developing communication and learning disorders. Early identification and management of hearing loss associated with otitis media is important for optimum developmental outcome. Thus, any Clinical Practice Guidelines developed for the diagnosis and treatment of otitis media in children, must specifically include audiologic assessment and management as integral components.. It is not the degree of hearing loss alone that is an issue, but the intrinsic nature of the conductive hearing loss associated with otitis media and middle ear effusion ...
Cochlear implant technology is growing rapidly in Malaysia to assist patients with hearing problems especially among children. Cochlear implants may be beneficial for the speech development of children and help children attend normal schools. However, the success of cochlear implants depends on the detection and early intervention of children and efforts to habilitation / rehabilitation by therapists and parents.. The latest scenario in Malaysia, most users only use cochlear implant in one ear only. Therefore, various studies have been conducted to evaluate the benefits of cochlear implants. According to a study on the use of cochlear implant and its impact on the binaural processing for pediatric patients and adults showed that patients using bimodal fitting get better benefits than patients using cochlear implant or hearing aid in one ear only (Molly Justus, 2008).. ...
Vestibular aqueducts are narrow, bony canals that travel from the inner ear to deep inside the skull (see figure). The aqueducts begin inside the temporal bone, the part of the skull just above the ear. The temporal bone also contains two sensory organs that are part of the inner ear. These organs are the cochlea, which detects sound waves and turns them into nerve signals, and the vestibular labyrinth, which detects movement and gravity. These organs, together with the nerves that send their signals to the brain, work to create normal hearing and balance. Running through each vestibular aqueduct is a fluid-filled tube called the endolymphatic duct, which connects the inner ear to a balloon-shaped structure called the endolymphatic sac ...
The most common type of hereditary motor and sensory neuropathy type 1, HMSN 1A, is caused by a duplication of the gene for peripheral myelin protein 22 (PMP 22), situated on chromosome 17p. We report on a patient with this genotype with bilateral sensorineural deafness.. A 28 year old man presented with progressive distal weakness, numbness, and progressive bilateral hearing loss. He had first noticed problems with running in his early teens and at the age of 13 had two operations to correct bilateral pes cavus. His walking tolerance gradually deteriorated to half a mile unaided. At the age of 24, he had three operations to correct thoracic scoliosis and subsequently noticed progressive weakness of his hands. Since the age of 26 he had been aware of diminished sensation in his feet and progressive bilateral hearing loss. Medical history was unremarkable and he had not been exposed to any relevant drugs or toxins. There was no history of neurological problems among three siblings, his three ...
Twelve patients who were treated for ear injuries at Guys Hospital following the London Bridge bomb blast in February 1992 were reviewed. Among three there were four perforated eardrums, two of which closed spontaneously (50%). All three patients had a persistent mixed hearing loss. The remaining nine patients had acute sensorineural hearing loss and/or tinnitus only. Four of these had resolved completely by 4h, another one by 48h, and two by 4 weeks. Two patients had a residual high frequency hearing loss. In total, five patients (42%) have a persistent hearing loss. None of the patients suffered from balance problems. In summary, the ear is very susceptible to bomb blast injury, but there is a high rate of spontaneous closure of perforations and improvement of sensorineural hearing loss and tinnitus.. ...
This study aims to determine the prevalence and associated factors of noise-induced hearing loss (NIHL) among vector control workers in the state of Negeri Sembilan, Malaysia. This was an analytical cross-sectional study conducted on 181 vector control workers who were working in district health offices in a state in Malaysia. Data were collected using a self-administered questionnaire and audiometry. Prevalence of NIHL was 26% among this group of workers. NIHL was significantly associated with the age-group of 40 years and older, length of service of 10 or more years, current occupational noise exposure, listening to loud music, history of firearms use, and history of mumps/measles infection. Following logistic regression, age of more than 40 years and noise exposure in current occupation were associated with NIHL with an odds ratio of 3.45 (95% confidence interval = 1.68-7.07) and 6.87 (95% confidence interval = 1.54-30.69), respectively, among this group of vector control workers.. ...
Isoflurane is a volatile inhaled anaesthetic widely used in animal research, with particular utility for hearing research. Isoflurane has been shown to blunt hearing sensitivity compared with the awake state, but little is known about how isoflurane compares with other anaesthetics with regard to hair cell transduction and auditory neurotransmission. The current study was undertaken in C57Bl/6J and C129/SvEv strains of mice to determine whether isoflurane anaesthesia affects hearing function relative to ketamine-based anaesthesia. Cochlear function and central auditory transmission were assessed using auditory brainstem response (ABR) and distortion product otoacoustic emission (DPOAE), comparing thresholds and input/output functions over time, for isoflurane vs. ketamine/xylazine/acepromazine anaesthesia. ABR thresholds at the most sensitive region of hearing (16 kHz) were initially higher under isoflurane anaesthesia. This reduced hearing sensitivity worsened over the 1 h study period, and also became
Patients with chronic ear infection where the drum and/or the small bones in the middle ear are damaged often have hearing loss, but difficulties in using a hearing aid fitted in the ear canal. Direct bone conduction through a vibrator attached to a skin-penetrating implant addresses these disadvantages.. In 1977, the first three patients were implanted with a bone-conduction hearing solution by Anders Tjellström at the Ear, Nose, and Throat Department at Sahlgrenska University Hospital in Gothenburg, Sweden. A 4-mm-long titanium screw with a diameter of 3.75 mm was inserted in the bone behind the ear, and a bone conduction hearing aid was attached.. The term osseointegration was coined by Professor Brånemark. During animal studies, he found the bone tissue attached to the titanium implant without any soft tissue in between. He also showed an such an implant could take a heavy load. His definition of osseointegration was "direct contact between living bone and an implant that can take a ...
Noise-induced hearing loss is 100% preventable. The first step is understanding what types of noise is harmful. OSHA regulates noise exposure at 85 dB and above. An 85 dB noise example would be a viola or a noisy restaurant. Other examples would be in the orchestra pit or a power mower. Louder noise examples would include a weed trimmer at 94 dB, a flute at 100 dB, a chain saw at 115 dB, and a gun shot at 140 dB. The second step is understanding dosage. The length you are exposed to noise also plays into the risk of hearing loss. OSHA states you can be in 85 dB noise up to 8 hours. However, a even a small increase in dB means a large decrease in safe time exposure. 91 dB safe exposure time is only 2 hours. A 103 dB time limit would be less than 8 minutes. Anything over 106 dB, and without ear plugs you could be exposed for only 3 minutes safely. A gun shot has no safe exposure time. ...
Background Otosclerosis is a disorder that impairs middle ear function, leading to conductive hearing loss. Surgical treatment results in large improvement of hearing at low sound frequencies, but high-frequency hearing often suffers. A likely reason for this is that inner ear sensory cells are damaged by surgical trauma and loud sounds generated during the operation. Animal studies have shown that antioxidants such as N-Acetylcysteine can protect the inner ear from noise, surgical trauma, and some ototoxic substances, but it is not known if this works in humans. This trial was performed to determine whether antioxidants improve surgical results at high frequencies. Methods We performed a randomized, double-blind and placebo-controlled parallel group clinical trial at three Swedish university clinics. Using block-stratified randomization, 156 adult patients undergoing stapedotomy were assigned to intravenous N-Acetylcysteine (150 mg/kg body weight) or matching placebo (1:1 ratio), starting one ...
In pathogenic trypanosomes, trypanothione synthetase (TryS) catalyzes the formation of both glutathionylspermidine (Gsp) and trypanothione (bis(glutathionyl)spermidine (T(SH)2)). such as for example African sleeping sickness and Nagana cattle disease (types), South-American Chagas disease ((7, 8), (9, 10), and (11) LILRB4 antibody types make use of TryS as Licochalcone B IC50 an individual enzyme to create both Gsp and T(SH)2 (Structure 1). and catalyze the last mentioned response at pH 7.5 and 25 C, using a worth of 0.9 and 0.5 mm and a and TryS hydrolyze Gsp for a price that is significantly less than 1% that of the synthetase Licochalcone B IC50 activity, and cleavage of T(SH)2 is even slower (7, 9). Open up in another window Structure 1 In the seek out novel drug goals, pathways that are crucial for parasite success and so are absent through the mammalian web host are attractive beginning points. Hereditary and chemical techniques revealed that proteins from the T(SH)2 program studied up to ...
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Plotkowski, A., Alexander, J. M. (in press). A sequential sentence test paradigm using revised PRESTO sentence lists. Journal of the American Academy of Audiology.. Alexander, J. M. (2016). Nonlinear frequency compression: Influence of start frequency and input bandwidth on consonant and vowel recognition. Journal of the Acoustical Society of America, 139, 938-957.. Brennan, M. A., McCreery, R., Kopun, J., Alexander, J. M., Lewis, D., Stelmachowicz, P. G. (2016). Masking release in children with hearing loss when using amplification. Journal of Speech Language and Hearing Research, 59, 110-121.. Rallapalli, V., Alexander, J. M. (2015). Neural-Scaled Entropy predicts the effects of nonlinear frequency compression on speech perception. Journal of the Acoustical Society of America, 138, 3061-3072.. Alexander, J. M., Masterson, K. M. (2015). Effects of WDRC release time and number of channels on output SNR and speech recognition. Ear and Hearing, 36, e35-e49.. Alexander, J. M., Kopun, J.G., ...
Notice - Effective December 12, 2016 regarding hearing aid dispensing:. The Food and Drug Administration has released a guidance document indicating FDA does not intend to enforce the medical clearance and recordkeeping requirements found in 21 C.F.R. 801.421(a) and (d) at this time. You may view the guidance document here. Per the FDA, this guidance is non-binding and may be revised in the future.. Per the guidance document, this only applies to Class I air-conduction hearing aids and Class II wireless air-conduction hearing aids. It does not apply to Class II bone-conduction hearing aids, hearing aids labeled as prescription only, and hearing aids for individuals under 18.. Further questions regarding the FDA guidance document should be directed to the FDA by contacting Eric Mann at 301-796-5620. Please note that neither the Board nor its staff can provide legal advice or guidance.. ...
Single or Multi-Channel Cochlear Implants Cochlear implants are recognized as an effective treatment of sensorineural deafness. While use of a unilateral cochlear implant in an individual with severe to profound hearing loss has become a standard clinical practice, bilateral implantation is less common. Evolution of cochlear implant devices has focused on minimizing the internally implanted electrodes, such that one device, the Nucleus® 24 (Cochlear Americas, Englewood, CO), received FDA approval (2000) for use in children 12 months of age and older. A review of the early peer-reviewed literature includes several reports on individuals with bilateral cochlear implants (Long, 2003; Muller, 2002; Schoen, 2005; Tyler, 2002; van Hoesel, 2002; van Hoesel, 2003). These early reports evaluated small numbers of individuals and provided limited outcome information. In these reports, most, but not all, individuals reported very slight to modest improvements in sound localization and speech ...
Purpose: This study characterized the development of speech sound production in prelingually deaf children with a minimum of 8 years of cochlear implant (CI) experience. Method: Twenty-seven pediatric CI recipients spontaneous speech samples from annual evaluation sessions were phonemically transcribed. Accuracy for these speech samples was evaluated in piecewise regression models. Results: As a group, pediatric CI recipients showed steady improvement in speech sound production following implantation, but the improvement rate declined after 6 years of device experience. Piecewise regression models indicated that the slope estimating the participants improvement rate was statistically greater than 0 during the first 6 years post implantation, but not after 6 years. The group of pediatric CI recipients accuracy of speech sound production after 4 years of device experience reasonably predicts their speech sound production after 5-10 years of device experience. Conclusions: The development of ...
Children with profound deafness are at risk for serious reading difficulties. Multiple factors affect their development of reading skills, including use of cochlear implants. Further, multiple factors influence the overall success that children experience with their cochlear implants. These factors include the age at which they receive an implant, method of communication, vocabulary skills, preoperative residual hearing, and socioeconomic status. Ninety-one children with prelingual and profound hearing impairments who received cochlear implants at varying ages participated in the study. Structural equation modeling confirmed that multiple factors affected young cochlear implant users reading comprehension skills and that there were significant associations between the predictors of reading comprehension. Pre-implant vocabulary had an indirect positive effect on reading through postimplant vocabulary, which had a direct positive effect on reading. Overall, children with stronger language skills ...
by this long-running grant has made the ICICRC one of the worlds premier centers for cochlear implant clinical research.. The five-year, $10 million grant renewal will fund ongoing basic research, clinical trials and clinical outcomes research on cochlear implants in children and adults by researchers from the UI Carver College of Medicine and the UI College of Liberal Arts and Sciences Department of Speech Pathology and Audiology.. The center was established in 1985 when cochlear implants first became available and is directed by Bruce Gantz, M.D., the Brian F. McCabe Distinguished Chair and UI professor and head of otolaryngology - head and neck surgery, and Richard Tyler, Ph.D., UI professor of otolaryngology - head and neck surgery and speech pathology and audiology. The long-term NIH funding, now totaling $38 million over 25 years, allows ICICRC researchers to translate basic research on the auditory system into new cochlear implant technologies that improve speech understanding for ...
For children, the American Speech-Language-Hearing Association (2010) states that the best candidates for cochlear implants are those who: "have profound hearing loss in both ears; can receive little or no useful benefit from hearing aids; have no other medical conditions that would make the surgery risky; are involved (when able), along with their parents, in all aspects of the informed consent process; understand (when able), along with their parents, their individual roles in successful use of cochlear implants; have (when able), along with their parents, realistic expectations for cochlear implant use; are willing to be involved in intensive rehabilitation services; and have support from their educational program to emphasize the development of auditory skills" (para. 15 ...
Advanced Bionics extends their portfolio of solutions for cochlear implant users with the introduction of the Naída Link CROS Solution. If you have one cochlear implant, and no hearing in the opposite ear, the Naída Link CROS can transmit sound wirelessly from your bad side to the cochlear implant! Full press release from Advanced Bionics: Jul…
Children with bilateral cochlear implants are found to have better language and vocabulary skills than children with unilateral cochlear implants, a study shows.
From MyShelf.com. Cochlear implants are a constant subject in the deaf community, but not always in the hearing world. A few months ago, the hearing loss of radio host Rush Limbaugh made the headlines and his choice to have the cochlear implant surgery brought the subject back to the attention of the hearing world, and to hearing parents of deaf children. The authors of Cochlear Implants in Children couldn t have chosen a better time to present their work.. My husband and I would have given anything to have this book years ago, when we discovered our son s deafness. It s emotional enough to learn of one s baby s deafness, but to also be without knowledge of the deaf and faced with varying ways to deal it, is confusing and stressful. Hearing parents want to meet their deaf child s needs and make the right decisions to prepare them for the future. It s a difficult situation for hearing parents to be in, and if there is one book I would place in the hands of those hearing parents after the ...
To investigate the subjective benefits of bilateral cochlear implantation in 33 young children after 18 months of second implant use. Method: The Würzburg questionnaire inquiring into a range of hearing functions was filled out by the parents. Additional data concerning the daily life and well-being of the children were gathered with an open-ended questionnaire and the Categories of Auditory Performance. Results were analyzed separately for children younger and older than 6 years at the time of the second implantation. Results: After 18 months of bilateral implant use 30% of the younger and 6% of the older children made the transition to an auditory-oral communication. In this period, 15% of all children switched to mainstream schools. The parents reported an evolution of their childrens auditory abilities, which included a better sound and speech perception. Multiregression analysis revealed that early hearing aid fitting and the age at the second cochlear implantation significantly ...
Cochlear implant auditory rehabilitation therapy programs are essential for hearing potential. Learn more here | MED-EL Cochlear Implants
A cochlear implant electrode assembly (10) comprising an elongate electrode carrier member (11), a bioresorbable stiffening element (15) and an outer layer (16) surrounding the stiffening element (15). The carrier member (11) is made of a resiliently flexible first material and has a plurality of electrodes (12) mounted thereon and has a first configuration selected to allow it to be inserted into an implantees cochlea, and at least a second configuration wherein it is curved to match a surface of the cochlea. The bioresorbable stiffening element (15) has a configuration selected for biassing the elongate member (11) into the first configuratin and is made of a second material relatively stiffer than the first material and which dissolves or softens on exposure to cochlear fluids to permit the elongate member (11) to at least approach or adopt the second configuration. The outer layer (16) surrounding the stiffening element (15) is made of a material sufficiently resiliently flexible to allow the
Paul J. Abbas, Ph.D. "Factors Affecting Auditory Performance: Electrophysiologic Measures" Professor Department of Speech Pathology and Audiology Department of Otolaryngology Head and Neck Surgery University of Iowa Iowa City, Iowa Peter Blamey, Ph.D. "Factors Affecting Auditory Performance of Postlinguistically Deaf Adults Using Cochlear Implants: Etiology, Age, and Duration of Deafness" Principal Research Fellow Department of Otolaryngology University of Melbourne East Melbourne, Victoria, Australia Derald E. Brackmann, M.D., F.A.C.S. "Percutaneous Connectors in Cochlear Implantation" Clinical Professor of Otolaryngology-Head and Neck Surgery/Neurosurgery University of Southern California School of Medicine President House Ear Clinic and Institute Los Angeles, California Judith A. Brimacombe, M.A. "Multichannel Cochlear Implants in Adults With Residual Hearing" Vice President Clinical and Regulatory Affairs Cochlear Corporation Englewood, Colorado Patricia M. Chute, Ed.D. "Residual Hearing in ...
Karen Gordon, University of Toronto, donnera une conférence le 7 octobre 2010, à 16h au BRAMS, intitulée « Auditory plasticity in children who are deaf and use cochlear implants to hear speech and music ».. Cet événement se tiendra en anglais.. A PROPOS DE KAREN GORDON. Karen Gordon is an Assistant Professor in the Department of Otolaryngology and a Graduate Faculty Member in the Institute of Medical Science at the University of Toronto. She works at the Hospital for Sick Children in Toronto, Ontario, Canada, as a Scientist in the Research Institute and Director of Research in the Cochlear Implant Laboratory. She received her Ph.D. (2005) and B.Sc (1991) at the University of Toronto and her M.A. in Audiology (1993) at Northwestern University. She is a registered audiologist (reg. CASLPO, CCC-A), a Fellow of the American Academy of Audiology (AAA), and a member of the Association for Research in Otolaryngology (ARO) and the Society of Ear, Nose and Throat Advances in Children ...
OBJECTIVES/HYPOTHESIS: The (cost-)effectiveness and the subsequent reimbursement of bilateral cochlear implantation has been vigorously debated. Throughout the world healthcare commissioners are still struggling with the decision to reimburse bilateral implantation. Given this debate, this studys objective was to review the literature on the cost-utility of bilateral cochlear implantation in both children and adults, and study the impact of the used cost and quality-of-life estimates. STUDY DESIGN: Systematic review. METHODS: Electronic databases were systematically searched for relevant studies published up to December 2010. All studies reporting on cost-utility and bilateral cochlear implantation were included. RESULTS: Five studies fulfilled the inclusion criteria. The methodological quality of the studies, assessed with Drummonds checklist of cost-effectiveness studies, varied from poor to good. The assumptions regarding gain in quality-adjusted life years (QALYs) and direct costs varied ...
Is cochlear implantation a good treatment method for profoundly deafened elderly? Magdalena Lachowska, Agnieszka Pastuszka, Paulina Glinka, Kazimierz Niemczyk Department of Otolaryngology, Hearing Implant Center, Medical University of Warsaw, Warsaw, Poland Purpose: To assess the benefits of cochlear implantation in the elderly. Patients and methods: A retrospective analysis of 31 postlingually deafened elderly (≥60 years of age) with unilateral cochlear implants was conducted. Audiological testing included preoperative and postoperative pure-tone audiometry and a monosyllabic word recognition test presented from recorded material in free field. Speech perception tests included Ling's six sound test (sound detection, discrimination, and identification), syllable discrimination, and monosyllabic and multisyllabic word recognition (open set) without lip-reading. Everyday life benefits from cochlear implantation were also evaluated. Results: The mean age at the time of cochlear implantation was 72
Accompanying cochlear implant (CI) performance improvement over years, CI speech recognition increasingly showed unique patterns and huge inter-subject performance difference that are different from that of normal hearing (NH) listeners. Previous literatures have not paid enough attention to such unique patterns, regardless of numerous evidences. To further improve speech perception with the next generation CI device, it is critical to integrate such unique patterns into the CI framework.; The thesis addressed speech enhancement and intelligibility modeling from systematic approaches. Speech enhancement utilized unique speech recognition patterns as feedback to modify input auditory signals to CI devices. Speech intelligibility modeling unified CI device settings and psychoacoustic responses from individual subjects to predict inter-subject performance difference.; Although speech recognition with NH listeners are highly robust even when acoustic information is lost or variant, such listening ...
Aim. To study the efficacy of vagus nerve stimulation (VNS) therapy in a highly drug-resistant childhood epilepsy patient group and to investigate the effect of age at implantation on efficacy. Methods. The efficacy of VNS treatment was analysed in a cohort of 70 patients with drug-resistant epilepsy. Both children with focal (n=16) and generalized epilepsies (n=54) were included. Age at implantation varied between 19 months and 25 years. Results. Overall, responder rate was 54% with 5.7% children becoming seizure-free. The only factor in our analysis that could predict good outcome was age at implantation. In the youngest group ...
Auditory evoked potentials (AEP) are highly demanded during the whole process of equipping patients with cochlear implants (CI). They play an essential role in preoperative diagnostics, intraoperative testing, and postoperative monitoring of auditory performance and success. The versatility of AEPs is essentially enhanced by their property to be evokable by acoustic as well as electric stimuli. Thus, the electric responses of the auditory system following acoustic stimulation and recorded by the conventional surface technique as well as by transtympanic derivation from the promontory (Electrocochleography [ECochG]) are used for the quantitative determination of hearing loss and, additionally, electrically evoked compound actions potentials (ECAP) can be recorded with the intracochlear electrodes of the implant just adjacent to the stimulation electrode to check the functional integrity of the device and its coupling to the auditory system ...
Dr. Daniela Carvalho is a pediatric otolaryngologist with expertise in pediatric otology (ear surgery). She is currently the department of surgery chair, medical director of surgical services and the director of the hearing program at Rady Childrens Hospital-San Diego. She is also a clinical professor of surgery at UC San Diego school of Medicine.. She was the first surgeon in San Diego to do BAHA surgery in pediatric patients and also to do surgery for the sophono device. Dr. Carvalho earned her medical degree and completed her otolaryngology-head and neck surgery residency at the University of Campinas (UNICAMP) School of Medical Sciences (FCM) in Brazil, and completed a two-year pediatric otolaryngology fellowship training at Rady Childrens Hospital-San Diego. Her current research includes the impact of bilinguism in pediatric cochlear implant patients, the evaluation process of pediatric cochlear implantation and endoscopic otologic surgery.. Dr. Carvalho is very active in several national ...
Local resource for hearing loss treatments in Minnetonka. Includes detailed information on local businesses that give access to types of hearing loss treatment such as hearing aids, cochlear implants, wax blockage removal, gene therapy and more. Read on for more advice and content on the causes of hearing loss and auditory-verbal therapy.
The Advisory Committee on Immunization Practices (ACIP) of the Centers for Disease Control and Prevention (CDC) has updated its recommendations on pneumococcal vaccination for cochlear implant candidates and recipients. The recommendations are available online atwww.cdc.gov/mmr/preview/mmwrhtml/mm5231a5.htm.. In October 2002, the CDC recommended that all persons with cochlear implants receive age-appropriate pneumococcal vaccination with 7-valent pneumococcal conjugate vaccine (PCV7), 23-valent pneumococcal polysaccharide vaccine (PPV23), or both, according to the ACIP schedules for persons at high risk. The CDC issued these recommendations on the basis of preliminary data suggesting an increased risk for pneumococcal meningitis in persons with cochlear implants. Findings of a recent investigation by the CDC, the U.S. Food and Drug Adminisration, and state health departments support this recommendation. Children younger than six years with a cochlear implant have a substantially greater risk for ...
International Journal of Otolaryngology is a peer-reviewed, Open Access journal that publishes original research articles, review articles, and clinical studies in all areas of otolaryngology-head and neck surgery. Articles from all subdisciplines will be considered, including head and neck oncology, laryngology, rhinology, otology, neurotology, and facial plastic surgery.
Is donor-acceptor cialis side effects hydrogen bonding necessary for 4,6-O-benzylidene-directed beta-mannopyranosylation? We tested the use of a viral envelope protein gp64 transgenic mouse for the direct immunization of these membrane proteins displayed on BVs. The aim of this study has been to evaluate the reported preparedness and disposition by medical students in a Nigerian university toward the use of IT for medical education.. Long-term categorical auditory performance and speech intelligibility in Mandarin-speaking prelingually deaf children with early cochlear implantation in Taiwan. To explore the repeatability of lower-order and higher-order ocular aberrations measured in patients with keratoconus. Infectious complications following cialis sans ordonnance unrelated cord blood transplantation. The amphibian thyroid system is similar to that of mammals and other tetrapods. To describe the case of a person with schizophrenia and agenesis of the corpus cialis sans ordonnance livraison 48h ...
A number of measures were evaluated with regard to their ability to predict the speech-recognition benefit of single-channel noise reduction (NR) processing. Three NR algorithms and a reference condition were used in the evaluation. Twenty listeners with impaired hearing and ten listeners with normal hearing participated in a blinded laboratory study. An adaptive speech test was used. The speech test produces results in terms of signal-to-noise ratios that correspond to equal speech recognition performance (in this case 80% correct) with and without the NR algorithms. This facilitates a direct comparison between predicted and experimentally measured effects of noise reduction algorithms on speech recognition. The experimental results were used to evaluate nine different predictive measures, one in two variants. The best predictions were found with the Coherence Speech Intelligibility Index (CSII) [Kates and Arehart (2005), J. Acoust. Soc. Am. 117(4), 2224-2237]. In general, measures using ...
Dr. Lalit Mohan Parashar has completed MBBS from MAMC, Delhi in 1985, MS (Otorhinolaryngology) from Maulana Azad Medical College, New Delhi in 1988, Advanced course in Hearing Aid technology from Tinitus Institute, Copenhagen, Denmark in 2009, Coblation Surgery Training in Obstructive Sleep Apnoea from Institute of Sleep Medicine, Bergen, Denmark in 2010 & Advances in Cochlear Implant Surgery from Sion Hospital, Hanghzou, Xinjian, China in 2012 and has expertise in Cochlear Implants, Ear Micro Surgery, Hearing Aid Fitting, Pure Tone Audiometry, Nasal Endoscopy, Balloon Sinuplasty, Surgery for Snoring etc ...
UOC di Otorinolaringoiatria, Azienda Ospedaliera di Rilievo Nazionale e di Alta Specializzazione di Caserta. ABSTRACT. Klippel-Trenaunay syndrome (KTS) is a rare congenital disorder characterized by capillary malformations (port-wine stains or flat haemangiomas), soft tissue and bone hypertrophy, large varicose veins. Intracranial vascular malformations are very rare. The Authors report a case of a 4 year old girl with KTS, suffering from anacusis in the left ear and severe sensorineural hearing loss in the right ear, who underwent cochlear implantation; in our case angiomatous formations were located inside the temporal bone, one of these adherent to the vertical portion of the facial nerve.. INTRODUCTION. In 1900 Maurice Klippel and Paul Trenaunay were the first to describe a rare angio-osteoipertrofica syndrome characterized by symptom triad: capillary malformations (port-wine stains or flat hemangiomas), soft tissue and bone hypertrophy, large varicose veins (1, 2). It typically affects one ...
Updated May 2017 with new products In this blog post Meriah Nicols describes What its like to wear waterproof hearing aids! Analogue hearing aids There have been a couple of different models of water resistant / waterproof hearing aids available on the market for many years that are suitable for a range of hearing losses.…
Chris Christian appears in concert tonight in the Bethel gym. A coffee shop view of the newly constructed amphitheater greets new and returning students. Rookie residents inhabit Hagstrom halls the Clarion Vol. 55 No. 1 Bethel College, St. Paul, MN Se • tember 7, 1979 Welcome Week: activities center around freshmen orientation "Seven hundred and fifty students arriving at the same time creates an amazing logistics pro-blem," said out-going Dean of Men Wink Menser, concerning Bethels 1979 version of Welcome Week. "Well take an aggressive approach, graciously attacking every car that pulls in on Friday." From the first ambush of a loaded car to the cleanup of the weeks climaxing banquet, Menser, along with co-chairmen Joel Johnson and Val Pasma, will attempt to present a balanced in-troduction to life at Bethel. Welcome Week is traditionally known for its summer camp, almost carnival atmosphere. "In the past, by the time classes started, the kids were ready for a vacation," said Menser. "We ...
TY - CONF. T1 - Relations between frequency selectivity, temporal fine-structure processing, and speech reception in impaired hearing. AU - Strelcyk,Olaf. AU - Dau,Torsten. N1 - Copyright 2009. Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.. PY - 2009. Y1 - 2009. N2 - Frequency selectivity, temporal fine-structure (TFS) processing, and speech reception were assessed for six normal-hearing (NH) listeners, ten sensorineurally hearing-impaired (HI) listeners with similar high-frequency losses, and two listeners with an obscure dysfunction (OD). TFS processing was investigated at low frequencies in regions of normal hearing, through measurements of binaural masked detection, tone lateralization, and monaural frequency modulation (FM) detection. Lateralization and FM detection thresholds were measured in quiet and in background noise. Speech reception thresholds were ...
Better Speech & Swallow treats & diagnoses many conditions. Dysphagia Treatment, Speech-Language Pathology, & Lee Silverman Voice Therapy.
Most cases of hearing impairment perhaps owing to a blocked auditory canal owing to the build-up of earwax. this can be temporary and straightforward to treat. Your ENT specialist would offer you some ear drops then flushes out the compact earwax. Your hearing would be simply reconditioned. However, if your sense organ - wherever the cells of the tube-shaped structure send signals to the brain area unit destroyed- youll find yourself having whats termed as sensory neural hearing impairment. This condition is irreversible. Some cases of hearing impairment area unit owing to infections and neoplasm ...
Blake Wilson, Graeme Clark, and Ingeborg Hochmair were awarded the Lasker Award this week for their contributions to the development of the cochlear implant. The Lasker Award is essentially the American Nobel prize, and this is an incredible recognition of not only the importance of cochlear implant technology but also a much broader acknowledgment of the importance of hearing and communication by the entire scientific community. There will be several events over the next few months building on this recognition with interviews with the Lasker awardees, a dedicated one-hour show on PBS with Charlie Rose and Eric Kandel on hearing, and finally a two-day workshop sponsored by the Institute of Medicine on hearing loss in older adults in January ...
This article examines how new approaches-coupled with previous insights-provide a new framework for questions that deal with the nature of phonological and lexical knowledge and representation, processing of stimulus variability, and perceptual learning and adaptation. First, it outlines the traditional view of speech perception and identifies some problems with assuming such a view, in which only abstract representations exist. The article then discusses some new approaches to speech perception that retain detailed information in the representations. It also considers a view which rejects abstraction altogether, but shows that such a view has difficulty dealing with a range of linguistic phenomena. After providing a brief discussion of some new directions in linguistics that encode both detailed information and abstraction, the article concludes by discussing the coupling of speech perception and spoken word recognition. ...
The antibiotics and immunosuppressive drugs required by organ transplant patients can cause deafness, said Dr. Brian J. McKinnon, otologist and neurotologist at the Medical College of Georgia at Georgia Health Sciences University.. Dr. Brian J. McKinnon, otologist and neurotologist (right), and Dr. Kenneth C. Iverson, Chief Resident in otolaryngology, at the Medical College of Georgia at Georgia Health Sciences University. Antibiotics can destroy the finite number of dark cells in the inner ear. These cells produce the minute amount of fluid needed to help convert sound waves to neural impulses the brain can interpret. Apparently these dark cells are very metabolically active and antibiotics are designed to interfere with bacterias metabolic activity.. "When you destroy the ability to make fluid, the system no longer functions," McKinnon said. Any sound patients may hear is incomprehensible.. Drugs that keep the immune system from attacking a transplanted organ can also leave the inner ear ...
Pitch Perception and Encoding Pitch Contours in College Aged Individuals with Autism Spectrum Disorder Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder characterized by deficits in communication and social interaction. Previous research has suggested that individuals with ASD exhibit deficits in the identification of verbally-expressed emotions. Emotion is carried by a property of speech known as prosody, which is characterized by dynamically changing pitch patterns and temporal attributes. The auditory brainstem is responsible for the proper encoding of the changing pitch. However, it has been found that in people with ASD, the auditory brainstem is not able to track and encode prosody correctly. Therefore, it is extremely difficult for people with ASD to accurately perceive emotion. The current experiment investigated whether pitch perception training can result in improved perception of pitch and, consequently, improved identification of emotion. Pitch perception and emotional
The National Academy of Engineering announced today that the 2015 Fritz J. and Dolores H. Russ Prize will be given to Blake S. Wilson, Graeme M. Clark, Erwin Hochmair, Ingeborg J. Hochmair-Desoyer, and Michael M. Merzenich
Speech recognition thresholds are used for several clinical purposes, so it is important that they be accurate reflections of hearing ability. Variations in the acoustic signal may artificially decrease threshold scores, and such variations can result from being tested in a second dialect. Thirty-two native Mandarin-speaking subjects (sixteen from mainland China and sixteen from Taiwan) participated in speech recognition threshold testing in both dialects to see whether using non-native dialect test materials resulted in a significantly lower score. In addition, tests were scored by two interpreters, one from each dialect, to see whether the scorers dialect resulted in a significantly different score. Talker dialect was found to be statistically significant, while scorer dialect was not. Factors explaining these findings, as well as clinical implications, are discussed.
The standard transmastoid facial recess approach has become the popular technique for cochlear implantation. Although this approach has been used for implantation in patients with common cavity malformations, in patients with this anomaly and severe abnormalities of the middle ear, this approach may be technically difficult and makes the facial nerve vulnerable to injury. Using a direct approach to the common cavity through the mastoid cavity, we have successfully performed cochlear implantation in 1 patient with a common cavity malformation. This transmastoid labyrinthotomy approach to the common cavity is an effective and simple technique for placing the electrode array. It minimizes the risk to the facial nerve and may decrease postoperative cerebrospinal fluid leaks.. ...
Hearing Implants and Biomaterials Market:. Executive Summary. The 2017 study has 162 pages, 88 tables and figures. Hearing Implants and Biomaterial markets are poised to achieve significant growth with increasing use of next generation metals, polymers, and ceramics set to enhance the value of hearing surgery and improve surgical outcomes. By improving hearing of people with profound hearing deficits. Improvements is hearing for severely deaf infants, children and adults particularly old people are dramatic.. Small implant, great results is the norm. The best results were found among children who received the cochlear implant at 0-3 years of age. They achieved 90 to 95 percent hearing and language improvement. 80-90 percent of these children develop a hearing and speech equal to those of children with normal hearing. Biomaterials inside CI are biological materials that are implanted into the ear area to repair hearing. All CI manufacturers use platinum contacts in electrode production. Iridium ...
In cochlear implant surgery an electrode array is permanently implanted to stimulate the auditory nerve and allow deaf people to hear. Current surgical techniques require wide excavation of the mastoid region of the temporal bone and one to three hours time to avoid damage to vital structures. Recently a far less invasive approach has been proposed-percutaneous cochlear access, in which a single hole is drilled from skull surface to the cochlea. The drill path is determined by attaching a fiducial system to the patients skull and then choosing, on a pre-operative CT, an entry point and a target point. The drill is advanced to the target, the electrodes placed through the hole, and a stimulator implanted at the surface of the skull. The major challenge is the determination of a safe and effective drill path, which with high probability avoids specific vital structures-the facial nerve, the ossicles, and the external ear canal-and arrives at the basal turn of the cochlea. These four features lie ...
Stuart Rosen has brought theoretical insight and new research techniques to national and international collaborations in APD. His work on auditory discrimination skills, and his collaboration with Sophie Scott on rhythmic and nonverbal aspects of auditory perception, has provided new grounds for exploring developmental language impairments. Andrew Faulkner and colleagues cochlear implant work demonstrates perceptual adaptation to the distortions of frequency-to-place mapping that arise in CI users, and the limitations of current devices in signalling the pitch of spectrally-varying sounds such as speech. Paul Iverson has established a new theoretical conceptualization of the acquisition of non-native speech sounds which he is now applying to L2 training. Valerie Hazans ground-breaking studies of talker variability revealed inter-listener differences in the acoustic-phonetic determinants of speech intelligibility. She has also led the international field in considering the role of speechreading ...
IVDepartment of Radiology, Radboud University Nijmegen Medical Center, The Netherlands. Correspondence. A 46-year-old man presented to the Department of Otolaryngology with congenital deafness of unknown cause. With the help of hearing aids (which did not provide any speech understanding in the sound-only condition) and by mastering speech reading, he had learned to speak quite fluently at a school for deaf and hearing-impaired children. Despite these capabilities, he came to seek advice about cochlear implants, as he would like to communicate more conveniently with his family, of whom none had significant hearing loss.. On physical examination, he was completely deaf and had adapted to major vestibular deficits (i.e. bilateral vestibular areflexia). The following CT scan of the petrous bone (Figure 1) and MRI images of the cerebellopontine angle (Figure 2) were obtained.. ...
First, allow me to explain how I ended up knowing about this deaf cat. A deaf woman, Lisa Ramey, from Phoenix, AZ, stumbled upon this 1.5 year old deaf cat on craigslist where this hearing owner was in hurry to get rid of him and contacted Deaf Animal Row. There was never a picture shown of the cat at all. In his own words, his deaf cat wont stop playing when his hearing cat hissed. Whats the crime of having a playful cat? He just wants his deaf cat out without the consideration nor sensitivity when it comes to accomodating and training a deaf cat. Interesting how a deaf cat has to be the one to go. Doesnt it sound familiar that being deaf is used as a scapegoat for everything that goes wrong? He has never and do not want to name the deaf cat because he cant hear his own name. Oh, does it mean we, deaf people, ought be nameless as well? Wasnt he aware about name sign thats prevalent in the Deaf community? When one uses the sign name daily to a deaf cat or dog, some deaf cats and dogs will ...
In May the first temporal bone lab opened at Jos University Teaching Hospital (JUTH) in Jos, Nigeria. Originally located at Swedish Hospital (Denver, CO) and used by the Cochlear Corporation to train U.S. surgeons in cochlear implant surgery, the eight-station refurbished lab was installed and is now used by otolaryngology residents and surgeons from all parts of Africa, as provided by the West African College of Surgeons. Continue reading →. ...
An implant device for treating hearing disorders. In one exemplary embodiment, an implant body is dimensioned for attachment to the ossicular chain of a patient. The implant body carries a micro-encapsulated MEMS inertial sensing device that is electrically coupled by a micro-cable to an implantable signal processing system. The MEMS inertial sensor is capable of directly sensing acoustic waves transmitted through the ossicular chain. Signals from the inertial sensor are sent to the signal processing system for filtering, conditioning and amplification to thereafter be carried to a plurality of electrodes carried by a cochlear implant.
0138]However, the electrode combination can be shifted distally, i.e., upward in the orientation of FIG. 7. There is room on leads 26A, 26B to shift the electrode combination distally by two shift positions. Hence, if the initial position is shift position 1, shifts can be made to shift position 2 and shift position 3. Each shift may represent a shift in the position of the active electrodes associated with the previous electrode combination such that the electrical stimulation pattern remains identical or substantially similar, e.g., in terms of relative positions and spacing between the active electrodes in both the initial and shifted electrode combination. In addition, the initial and shifted electrode combinations have a common number of electrodes. In the example of FIG. 7, each electrode combination has three electrodes (110C, 110D, and 112C for the first combination), and the electrode combinations have a substantially similar electrode pattern. Active electrodes are those electrodes ...
A day that is forever etched in my memory is the day I resigned from my job. I pulled up to go into one of my accounts at a noisy salon and literally could not get out of my car. The thought of walking into that business and not being able to understand what was being said to me over the background noise was overwhelming. My employer was wonderful and tried to place me in a position within the company where I didnt need to rely as much on my hearing, but I just wasnt able to continue working.. Because my hearing aids were no longer benefiting me, I was evaluated to see if I was a candidate for a cochlear implant (CI). While I met the criteria for a CI, I was concerned about losing my residual hearing. I felt I would be giving up normal hearing in one level to gain hearing in another. So I chose to wait.. In the following years, I lived between two worlds.. I no longer fit into the normal hearing world because I could not have social conversations in a group or talk on the phone, or hear ...
Although initial studies suggested that the MEP in the rat arises from activation of the spinal pyramidal pathway, subsequent studies have raised doubts concerning the pyramidal origin of the MEP and have proposed that the spread of stimulation current in some of these studies resulted in activation of the extrapyramidal system. [18-24] Ryder and colleagues [24] showed that monopolar stimulation of the sensorimotor cortex activates the extrapyramidal and pyramidal tracts, and bipolar stimulation restricted to the motor cortex using low stimulus current activates only the pyramidal tract. They concluded that early and late latency spinal-evoked responses were considered to be induced by activation of extrapyramidal and pyramidal tracts, respectively. Although we used bipolar stimulation of the motor cortex in the present study, stimulus current was higher than that reported by Ryder and colleagues. [24] Both extrapyramidal and pyramidal tracts must be activated in the present study. However, it ...
A cochlear implant (CI) is a neural prosthetic device that restores hearing by directly stimulating the auditory nerve using an electrode array surgically placed in the cochlea. Conventional CI implantation techniques require major excavation of the skull to achieve access and place an electrode array into the cochlea. After placement, CIs are typically programmed to attempt to optimize hearing outcome. Recently, image-guidance has been proposed to minimize the invasiveness of conventional CI surgery techniques as well as to design new strategies to improve CI programming outcomes. These image-guided techniques necessitate the automatic segmentation of the structures of the ear in pre- or post-implantation CTs, or the automatic registration of pre- and intra-implantation CTs. The structures of the ear include the facial nerve, the chorda tympani, the labyrinth, the ear canal, the tympani membrane, the ossicles, and the inner ear structures, which include the scala tympani, the scala vestibuli ...
previous post , next post » Today at ISCSLP2016, Xuedong Huang announced a striking result from Microsoft Research. A paper documenting it is up on arXiv.org - W. Xiong, J. Droppo, X. Huang, F. Seide, M. Seltzer, A. Stolcke, D. Yu, G. Zweig, "Achieving Human Parity in Conversational Speech Recognition":. Conversational speech recognition has served as a flagship speech recognition task since the release of the DARPA Switchboard corpus in the 1990s. In this paper, we measure the human error rate on the widely used NIST 2000 test set, and find that our latest automated system has reached human parity. The error rate of professional transcriptionists is 5.9% for the Switchboard portion of the data, in which newly acquainted pairs of people discuss an assigned topic, and 11.3% for the CallHome portion where friends and family members have open-ended conversations. In both cases, our automated system establishes a new state-of-the-art, and edges past the human benchmark. This marks the first time ...
Many medical professionals, faced with vulnerable parents of deaf newborns or newly deafened small children, offer the speech-only route as entirely different from the bimodal route. Frequently, they will urge parents to keep the child away from sign, offering the paradoxical justification that signing will be so "easy" that the child will lose motivation to learn to speak, and that the child can always learn a sign language later precisely because it is so easy [75]. This advice to avoid sign language is comprehensive and extends through both home and school [76-78]. Sometimes, families are encouraged or actually required to sign an agreement to this effect [79]. As a result, some parents will demand in their childs Individualized Education Plan at school that their child be removed from any access to sign language and be educated with speech/hearing only [80]. Cochlear implant protocols that prohibit the use of alternative accessible language are causing linguistic deprivation in deaf ...
Optical stimulation of the inner ear, the cochlea, is discussed as a possible alternative to conventional cochlear implants with the hypothetical improvement of dynamic range and frequency resolution. In this study nanosecond-pulsed optical stimulation of the hearing and non-hearing inner ear is investigated in vivo over a wide range of optical wavelengths and at different beam delivery locations. Seven anaesthetized guinea pigs were optically stimulated before and after neomycin induced destruction of hair cells. An optical parametric oscillator was tuned to different wavelengths (420 nm-2150 nm, ultraviolet to near-infrared) and delivered 3-5 ns long pulses with 6 µJ pulse energy via a multimode optical fiber located either extracochlearly in front of the intact round window membrane or intracochlearly within the scala tympani. Cochlear responses were measured using registration of compound action potentials (CAPs). With intact hair cells CAP similar to acoustic stimulation were measured at ...
Andrea Warner-Czyz, PhD, CCC-A. Dr. Warner-Czyzs research focuses on how young children with severe to profound hearing loss who wear cochlear implants develop speech, language, hearing, and quality of life. She is most interested in exploring the variability in this population to see if we can identify children at risk for slower or poorer development of communication and life satisfaction skills.. Dr. Warner-Czyz earned a BA in Speech and Hearing Science at the University of Illinois, a MA in Audiology at the University of Florida, a PhD at the University of Texas at Austin, and a MS in Clinical Sciences at The University of Texas Southwestern Medical Center.. Dr. Warner-Czyz enjoys exercising, biking, and reading. She also loves sports, especially football (Go Gators!) and gymnastics.. ...
A fully implantable cochlear prosthesis includes (1) an implantable hermetically sealed case wherein electronic circuitry, including a battery and an implantable microphone, are housed, (2) an active electrode array that provides a programmable number of electrode contacts through which stimulation current may be selectively delivered to surrounding tissue, preferably through the use of appropriate stimulation groups, and (3) a connector that allows the active electrode array to be detachably connected with the electronic circuitry within the sealed case. The active electrode array provides a large number of both medial and lateral contacts, any one of which may be selected to apply a stimulus pulse through active switching elements included within the array. The active switching elements included within the array operate at a very low compliance voltage, thereby reducing power consumption. The entire prosthesis is very efficient from a power consumption standpoint, thereby allowing a smaller battery to
In addition to publishing research articles, members of our team also contribute chapters on cochlear implantation to various textbooks. Drs. Susan Waltzman and J. Thomas Roland, Jr. recently released the third edition of Cochlear Implants, published by Thieme Medical Publishers.. Our researchers regularly present their work at numerous medical conferences worldwide, and are often invited to be visiting professors at national and international universities.. ...
This paper examines the meaning of plurality and diversity with respect to deaf childrens sign and spoken language exposure and repertoire within a super diverse context. Data is drawn from a small-scale project that took place in the North of England in a Local Authority (LA) site for deaf education. The project documented the language landscape of this site and gathered five individual case studies of deaf children to examine their plural and diverse language practices at home and at school. Analysis of the language landscape and case studies from this context is undertaken in order to define and exemplify deaf childrens language plurality and diversity in terms of context and individual experience. Concepts of repertoire are explored with particular reference to the unique type of translanguaging that the plural use of sign and spoken languages affords. Implications of these preliminary insights are discussed in terms of the development of methodologies that are sensitive to the particular ...
Likewise, they at a greater danger than blind persons to be knocked down by other vehicles on busy roads, as blind people are noticed immediately, and therefore protected by others, whereas the hearing impaired are not perceived so easily, and are therefore more liable to accidents than the Blind. Of course, the Real Cure for their deafness is through restorative surgery by repair of their ears by Biological Cochlear Implant. However, till this is possible, What is needed to help them, especially those Who are not really Mute, but rendered so because of their hearing disability, to assimilate with those having normal hearing power is an electronic device that can translate Spoken words or Audio Messages into Visual Form, i.e. either as typed messages orSign language, on a screen, to help Hearing Impaired(Deaf) people to SEE the conversation of those with normal hearing power, And VICE VERSA, viz. translating the message conveyed through Sign language by deaf- mute persons into Voice ...
Robert Jackler, MD, an expert in diseases of the ear and the base of the skull, has been named chief of otolaryngology at the medical center. With Jacklers arrival, the medical center plans to launch new clinical and research programs focused on the ear, nose and throat, in addition to growing Stanfords existing ENT programs.. Jackler will work with neurosurgery, radiation oncology and other departments to create a multidisciplinary center for cranial base surgery to care for hard-to-reach tumors located beneath the brain and along the brainstem. Under his leadership, the medical center plans to establish new programs in otology and neurotology (ear), laryngology (voice), adult audiology (hearing testing), and a hearing device center focused on such innovative technologies as the cochlear implant, an implantable device that restores hearing to deaf individuals by electrically stimulating the hearing nerve. Plans call for growth in existing programs in other areas including head and neck ...
Survey of perceptual and cognitive aspects of the psychology of music, with special emphasis on underlying neuronal and neurocomputational representations and mechanisms. Basic perceptual dimensions of hearing (pitch, timbre, consonance/roughness, loudness, auditory grouping) form salient qualities, contrasts, patterns and streams that are used in music to convey melody, harmony, rhythm and separate voices. Perceptual, cognitive, and neurophysiological aspects of the temporal dimension of music (rhythm, timing, duration, temporal expectation) are explored. Special topics include comparative, evolutionary, and developmental psychology of music perception, biological vs. cultural influences, Gestaltist vs. associationist vs. schema-based theories, comparison of music and speech perception, parallels between music cognition and language, music and cortical action, and the neural basis of music performance.
James L. Rutkowski D.M.D., PhD.is a Pharmacist, Dentist, and has a PhD. in Pharmacology. He has authored multiple publications in peer-reviewed journals and textbook chapters. Jim is also President/CEO of the Clarion Research Group (CRG) in Clarion, PA. CRG performs translational research for bone growth and salivary diagnostics. Additionally, he is Editor-in-Chief of the Journal of Oral Implantology and a Diplomate/Past-President of the American Board of Oral Implantology/Implant Dentistry (ABOI/ID). He lectures nationally and internationally on pharmacology, sedation techniques, and bone grafting as it applies to the dental practice.. Dr. Rutkowski maintains a general dental practice in Clarion, Pennsylvania with a concentration on apprehensive/medically-compromised patients. He utilizes oral, IM, inhalation and IV sedation techniques for patient management.. ...
An implantable cardiac stimulation device applies pacing stimulation pulses to a heart and senses evoked responses to the pacing stimulation pulses. A pulse generator applies the stimulation pacing pulses to the heart in accordance with a pacing configuration. A sensor control selects an evoked response sensing electrode configuration from among a plurality of evoked response sensing electrode configurations in response to the pacing configuration. A sensor is then programmed to sense the evoked responses with the selected evoked response sensing electrode configuration. In accordance with a preferred embodiment, signal-to-noise ratios obtained with the various electrode configurations are used to select a best electrode configuration for sensing evoked responses.
Be volume-savvy.While recommendations vary, volume on a device like a music player or smartphone shouldnt be higher than 60 to 80 percent of the maximum setting. The WHO suggests staying at or below 60 percent of the maximum. Most earbuds are made so they dont amplify sounds beyond a certain level, says audiologist Jason Wigand, an assistant professor and clinical director of the cochlear implant program at the University of South Carolina. However, he adds, "the amount of exposure that could be an insult to me is not going to be the same for you or from one person to another.". ...
Speech Recognition. Mital Gandhi Brian Romanowski. Objective - Speech Recognition. Isolated Word Recognition Portable and Fast. System Block Diagram. Recognition - Conceptually. Data Acquisition Training Hidden Markov Models for word set Recognition & Analysis. Slideshow 3312789 by cutler
This thesis presents the very first bionics chemical synapse which has the capability to sense the neurotransmitter (glutamate) and imitates the physiological behaviour of certain chemical synapse receptors (i.e. AMPA, NMDA, GABAA and GABAB). This bionics chemical synapse consists of two main parts: the glutamate ISFETs that act as neurotransmitter sensors and the current-mode CMOS circuits that have been designed to match the physiological behaviour of the chemical synapses. This bionics chemical synapse requires a sub-nano Siemens operational transconductance amplifier (OTA) to develop a low conductance gain for each chemical synapse receptor (0.1nS). A combination of two OTA designs was required to decrease the overall transconductance gain, which were: the bulk driven transistor and the drain current normalisation. To create the bionics chemical synapse, a neurotransmitter sensor is required as the chemical front-end for each receptor circuit. The sensor that was used is an enzyme-modified ...
Investigation of Balance Function Using Dynamic Posturography under Electrical-Acoustic Stimulation in Cochlear Implant...  Investigation of Balance Function Using Dynamic Posturography under Electrical-Acoustic Stimulation in Cochlear Implant...
The purpose of the present study is to investigate the effect of electrical-acoustic stimulation on vestibular function in CI ... Investigation of Balance Function Using Dynamic Posturography under Electrical-Acoustic Stimulation in Cochlear Implant ... Only under the static conditions are significantly poorer scores achieved when stimulation is applied. It may be that the ...
more infohttps://www.hindawi.com/journals/ijoto/2010/978594/abs/
Electric acoustic stimulation - Wikipedia  Electric acoustic stimulation - Wikipedia
... above 1 kHz can be beyond the range of amplification possible via acoustic stimulation. Electric stimulation (CI), on the other ... Electric acoustic stimulation (EAS) is the use of a hearing aid and a cochlear implant together in the same ear. The hearing ... This acoustic stimulation proves to be particularly effective in the low frequencies, though a severe hearing loss (> 70 dB HL ... Gstoettner W., Helbig S., Maier N., Kiefer J., Radeloff A., Adunka O. (2006). Ipsilateral Electric Acoustic Stimulation of the ...
more infohttps://en.wikipedia.org/wiki/Electric_acoustic_stimulation
Electric Acoustic Stimulation (EAS|sup|TM|/sup|) for Hearing Preservation | MED-EL  Electric Acoustic Stimulation (EAS|sup|TM|/sup|) for Hearing Preservation | MED-EL
The Electric Acoustic Stimulation hearing system combines acoustic amplification and cochlear implant technology for hearing ... Electric Acoustic Stimulation (EAS) uses acoustic amplification and cochlear implant technology (electric stimulation) together ... Electric Acoustic Stimulation (EAS) EAS combines a cochlear implant with hearing aid technology. This solution is for ... EAS provides acoustic stimulation that supports a persons natural residual hearing by amplifying the low frequencies. For ...
more infohttp://www.medel.com/int/candidacy-eas/
Application # 2005/0245991. Electric and acoustic stimulation fitting systems and methods - Patents.com  Application # 2005/0245991. Electric and acoustic stimulation fitting systems and methods - Patents.com
... least one hearing device for a patient with residual hearing provide needed orchestration of acoustic and electric stimulation ... stimulation to the electric-acoustic processor, and acoustic stimulation to the electric-acoustic processor. [0023] In another ... electric stimulation to the electric-acoustic processor, and acoustic stimulation to the electric-acoustic processor. 13. The ... stimulation to the electric-acoustic processor, and acoustic stimulation to the electric-acoustic processor. At step 606, a ...
more infohttp://patents.com/us-20050245991.html
US7561920B2 - Electric and acoustic stimulation fitting systems and methods 
        - Google Patents  US7561920B2 - Electric and acoustic stimulation fitting systems and methods - Google Patents
... least one hearing device for a patient with residual hearing provide needed orchestration of acoustic and electric stimulation ... electric stimulation to the electric-acoustic processor, and acoustic stimulation to the electric-acoustic processor. At step ... electric stimulation to the electric-acoustic processor, and acoustic stimulation to the electric-acoustic processor. ... US7561920B2 - Electric and acoustic stimulation fitting systems and methods - Google Patents. Electric and acoustic stimulation ...
more infohttps://patents.google.com/patent/US7561920B2/en
Combined Electric and Acoustic Stimulation With Hearing Preservation:  Effect of Cochlear Implant Low-Frequency Cutoff on...  Combined Electric and Acoustic Stimulation With Hearing Preservation: Effect of Cochlear Implant Low-Frequency Cutoff on...
Combined Electric and Acoustic Stimulation With Hearing Preservation: Effect of Cochlear Implant Low-Frequency Cutoff on Speech ... and bilateral-aided electric and acoustic stimulation (EAS; CI + bilateral hearing aid). Low-frequency cutoffs both below and ... The aided acoustic bandwidth was fixed and the low-frequency cutoff for the cochlear implant (CI) was varied systematically. ... The primary objective of this study was to assess the effect of electric and acoustic overlap for speech understanding in ...
more infohttps://insights.ovid.com/pubmed?PMID=28301392
Understanding the Benefits of Electric-acoustic Stimulation - Michael Dorman  Understanding the Benefits of Electric-acoustic Stimulation - Michael Dorman
Understanding the Benefits of Electric-acoustic Stimulation Dorman, Michael F. Brown, Christopher Leslie Arizona State ... The broad long-term goals of the proposed research are to advance the understanding of how low-frequency acoustic stimulation ... Understanding the benefits of electric-acoustic stimulation. Bacon, Sid P. / Arizona State University-Tempe Campus. $376,111. ... Understanding the benefits of electric-acoustic stimulation. Bacon, Sid P. / Arizona State University-Tempe Campus. $369,938. ...
more infohttp://grantome.com/grant/NIH/R01-DC008329-07
Evaluating the effects of acoustic stimulation on fibroblast cell migration and muscle fibre formation.  | LJMU Research Online  Evaluating the effects of acoustic stimulation on fibroblast cell migration and muscle fibre formation. | LJMU Research Online
Mohammed, T (2017) Evaluating the effects of acoustic stimulation on fibroblast cell migration and muscle fibre formation. ... Acoustic vibration; Mechanical stimulation; Fibroblast cell migration; Actin reorganisation; Wound healing; fiber formation. ... Evaluating the effects of acoustic stimulation on fibroblast cell migration and muscle fibre formation. ... Therefore, could mechanical stimulation be used to accelerate the wound healing process? Could mechanical stimulation be used ...
more infohttp://researchonline.ljmu.ac.uk/6047/
Motion generation by Drosophila mechanosensory neurons | PNAS  Motion generation by Drosophila mechanosensory neurons | PNAS
Acoustic Stimulation.. Sound-induced mechanical responses were obtained by exposing the animals to periodic chirp sounds (100- ... The particle velocity u of the acoustic stimulus was monitored at the position of the antenna by using an Emkay (Itasca, IL) NR ... Resonant fluctuations at corresponding frequencies occurred in the absence of acoustic stimuli (Fig. 5). Yet, fluctuation power ... 19). Cross-calibration against a Brüel & Kjaer Instruments (Naerum, Denmark) 4138 pressure microphone under acoustic far field ...
more infohttps://www.pnas.org/content/100/9/5514?ijkey=017106c52c3b73fd440844b629629e8ae77ed2cf&keytype2=tf_ipsecsha
Plus it  Plus it
Acoustic stimulation. The system used for stimulus generation and sound delivery as well as the calibration procedure have been ... 2004) Information content of auditory cortical responses to time-varying acoustic stimuli. J Neurophysiol 91:301-313. ... Precise spike timing to the onset of an acoustic feature is thought to support many auditory percepts, including discrimination ... A similar trend was observed with broadband noise burst stimulation (data not shown): although responses to 50 ms stimuli are ...
more infohttp://www.jneurosci.org/content/27/23/6091
Frontiers | Optogenetic Control of Neural Circuits in the Mongolian Gerbil | Frontiers in Cellular Neuroscience  Frontiers | Optogenetic Control of Neural Circuits in the Mongolian Gerbil | Frontiers in Cellular Neuroscience
Acoustic Stimulation. Frequency responses were calibrated for the headphones. Acoustic stimuli were generated digitally, ... The mean effect size was higher for monaural auditory stimulations (E0, 0.42; 0E/0I, 0.65), whereas for binaural stimulation ... Light Stimulation. An optic fiber (Thorlabs Multimode Optical Fiber, 0.39 NA, Ø = 200 μm Core, HighOH) was inserted into a ... The most important stimulation parameter was pulse duration and to some degree it can be utilized to compensate for variations ...
more infohttps://www.frontiersin.org/articles/10.3389/fncel.2018.00111/full
Frontiers | Corticofugal Augmentation of the Auditory Brainstem Response With Respect to Cortical Preference | Frontiers in...  Frontiers | Corticofugal Augmentation of the Auditory Brainstem Response With Respect to Cortical Preference | Frontiers in...
Acoustic Stimulation. The measurements took place in an electrically shielded, sound-attenuated, and anechoic (in the frequency ... Acoustic stimulation was controlled by an electric pulse generated with the CED 1401plus and Spike2 data acquisition system ( ... Local electrical stimulation of the mouse AC significantly reduced PIII and PV amplitudes (Aedo et al., 2016) when the ABR was ... At least, electrical stimulation of the AC could lead to slow excitatory postsynaptic potentials in principle cells of the ...
more infohttps://www.frontiersin.org/articles/10.3389/fnsys.2019.00039/full
Stimulation index | definition of stimulation index by Medical dictionary  Stimulation index | definition of stimulation index by Medical dictionary
... stimulation index explanation free. What is stimulation index? Meaning of stimulation index medical term. What does stimulation ... Looking for online definition of stimulation index in the Medical Dictionary? ... Fetal acoustic stimulation, Magnetic stimulation, Neural stimulation, Osteogenic stimulation, Ovarian stimulation, Pocket ... fetal acoustic stimulation. Vibroacoustic stimulation (of the fetus).. fetal scalp stimulation. An assessment of fetal well- ...
more infohttps://medical-dictionary.thefreedictionary.com/stimulation+index
Published Ahead-of-Print : Ear and Hearing  Published Ahead-of-Print : Ear and Hearing
Electric-Acoustic Stimulation Outcomes in Children. Park, Lisa R.; Teagle, Holly F. B.; Gagnon, Erika; More ... Effects of Phantom Electrode Stimulation on Vocal Production in Cochlear Implant Users. Caldwell, Meredith T.; Jiradejvong, ...
more infohttps://journals.lww.com/ear-hearing/toc/9000/00000
Responses of the Human Inner Ear to Low-Frequency Sound | SpringerLink  Responses of the Human Inner Ear to Low-Frequency Sound | SpringerLink
SOAEs are narrowband acoustic signals which are spontaneously emitted by the inner ear in the absence of acoustic stimulation. ... Hirsh I, Ward W (1952) Recovery of the auditory threshold after strong acoustic stimulation. J Acoust Soc Am 24:131CrossRef ... 3.4 Effect of Contralateral Acoustic Stimulation (CAS). Patuzzi (2011) suggested that large receptor-potentials elicited by low ... Finally, we show that the Bounce is affected by contralateral acoustic stimulation synchronised to the ipsilateral LF sound. ...
more infohttps://link.springer.com/chapter/10.1007%2F978-3-319-25474-6_29
Hearing Preservation in Cochlear Implant Surgery  Hearing Preservation in Cochlear Implant Surgery
2. Electric-Acoustic Stimulation (EAS). 2.1. Shortened Electrodes. It is known that cochlear implantation with a standard- ... C. A. von Ilberg, U. Baumann, J. Kiefer, J. Tillein, and O. F. Adunka, "Electric-acoustic stimulation of the auditory system: a ... This idea of electric-acoustic stimulation (EAS) first emerged from the work of two independent groups, one from Iowa, USA, and ... C. von Ilberg, J. Kiefer, J. Tillein et al., "Electric-acoustic stimulation of the auditory system. New technology for severe ...
more infohttps://www.hindawi.com/journals/ijoto/2014/468515/
The neurochemical basis of human cortical auditory processing: combining proton magnetic resonance spectroscopy and...  The neurochemical basis of human cortical auditory processing: combining proton magnetic resonance spectroscopy and...
We tested the hypothesis that: (i) the amplitude of the N1m response and (ii) its decrement during rapid stimulation are ... were measured during rapidly successive presentation of acoustic stimuli. ... during rapidly successive presentation of acoustic stimuli. Recurrent acoustic stimulation is associated with characteristic ... Stability of MRS results under acoustic stimulation MRS examinations, similar to conventional MRI scans, are associated with ...
more infohttps://bmcbiol.biomedcentral.com/articles/10.1186/1741-7007-4-25
Plus it  Plus it
Acoustic stimulation.. An earphone assembly consisting of a Knowles (Itasca, IL) 1914 receiver, a Knowles 1743 damping device, ... In this paper, a presentation of a single acoustic signal is referred to as a "trial." We used 5-10 trials per ITD to construct ... Improvement of ITD tuning with repeated stimulation. We compared the reliability of the ITD coding in both nuclei by examining ... will be influenced not only by the location of the sound in space but by features of the acoustic environment, such as the ...
more infohttp://www.jneurosci.org/content/26/22/5948
Plus it  Plus it
... of SON cells were driven by acoustic stimulation, while the remaining population was suppressed by acoustic stimulation (Fig. 1 ... 1A); 24.8% had an onset response during acoustic stimulation in which only one or two spikes fired at the beginning of a ... Some SON neurons respond to acoustic stimulation with phase-locked discharges. A: raster plots of responses to CF tones for 2 ... SON neurons have diverse response patterns to acoustic stimulation.. SON neurons were stimulated at BF with 50-ms tone bursts. ...
more infohttp://jn.physiology.org/content/105/5/2405
Affective Bonding in Mothers and Their Premature Newborn - Full Text View - ClinicalTrials.gov  Affective Bonding in Mothers and Their Premature Newborn - Full Text View - ClinicalTrials.gov
Acoustic stimulation/methods. Touch. Visual Stimulation. Vestibule, Labyrinth/physiology. Additional relevant MeSH terms: ... Training in multisensory stimulation using the ATVV Intervention (auditory, tactile, visual and vestibular) ... training in multisensory stimulation with the intervention ATVV and two domiciliary visits to follow up the mother and her ...
more infohttps://www.clinicaltrials.gov/ct2/show/NCT03070158
  • We tested the hypothesis that: (i) the amplitude of the N1m response and (ii) its decrement during rapid stimulation are associated with the cortical neurochemistry as determined by proton magnetic resonance spectroscopy. (biomedcentral.com)
  • Three primary findings were that (1) there was statistically significant benefit of preserved acoustic hearing in the implanted ear for most overlap conditions, (2) the default clinical software recommendation rarely yielded the highest level of speech recognition (1 of 13 ears), and (3) greater EAS overlap than that provided by the clinical recommendation yielded significant improvements in speech understanding. (ovid.com)
  • In conclusion, EAS patients may derive more benefit from greater acoustic and electric overlap than given in current software fitting recommendations, which are based solely on audiometric threshold. (ovid.com)
  • Main aspects of low-frequency hearing preservation surgery are discussed in this review: its brief history, electrode design, principles and advantages of electric-acoustic stimulation, surgical technique, and further implications of this new treatment possibility for hearing impaired patients. (hindawi.com)
  • The primary objective of this study was to assess the effect of electric and acoustic overlap for speech understanding in typical listening conditions using semidiffuse noise. (ovid.com)
  • We are studying the effect of acoustic modulation in slow-wave sleep on motor learning in rats. (siropglobal.org)
  • The broad long-term goals of the proposed research are to advance the understanding of how low-frequency acoustic stimulation combines with electric stimulation to enhance speech understanding in difficult listening situations, and to enhance EAS benefit for individuals who might otherwise receive limited or no benefit. (grantome.com)
  • The results show that 100Hz acoustic vibration can enhance cell migration, wound healing in LL24 and L929 cells and possible increase muscle fibre diameters although there was no significance, the trends were repeatable. (ljmu.ac.uk)
  • These results suggest that low-frequency acoustic vibration may be used as a tool to manipulate the mechano-sensitivity of cells to control cell migration and to enhance the diameters of muscle fibres. (ljmu.ac.uk)
  • The concept of combining simultaneous electric-acoustic stimulation (EAS) for the purposes of better hearing was first described by C. von Ilberg and J. Kiefer, from the Universitätsklinik Frankfurt, Germany, in 1999. (wikipedia.org)