Communication through a system of conventional vocal symbols.
Electrical waves in the CEREBRAL CORTEX generated by BRAIN STEM structures in response to auditory click stimuli. These are found to be abnormal in many patients with CEREBELLOPONTINE ANGLE lesions, MULTIPLE SCLEROSIS, or other DEMYELINATING DISEASES.
The 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).
Use of sound to elicit a response in the nervous system.
The acoustic aspects of speech in terms of frequency, intensity, and time.
Tests of the ability to hear and understand speech as determined by scoring the number of words in a word list repeated correctly.
The ability or act of sensing and transducing ACOUSTIC STIMULATION to the CENTRAL NERVOUS SYSTEM. It is also called audition.
A system of hand gestures used for communication by the deaf or by people speaking different languages.
Organic chemistry methodology that mimics the modular nature of various biosynthetic processes. It uses highly reliable and selective reactions designed to "click" i.e., rapidly join small modular units together in high yield, without offensive byproducts. In combination with COMBINATORIAL CHEMISTRY TECHNIQUES, it is used for the synthesis of new compounds and combinatorial libraries.
Individuals enrolled in a school or formal educational program.
Sequential operating programs and data which instruct the functioning of a digital computer.
Travel beyond the earth's atmosphere.
A plant genus of the family SOLANACEAE. Members contain SOLANACEOUS ALKALOIDS. Some species in this genus are called deadly nightshade which is also a common name for ATROPA BELLADONNA.
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
A profound state of unconsciousness associated with depressed cerebral activity from which the individual cannot be aroused. Coma generally occurs when there is dysfunction or injury involving both cerebral hemispheres or the brain stem RETICULAR FORMATION.
A negative shift of the cortical electrical potentials that increases over time. It is associated with an anticipated response to an expected stimulus and is an electrical event indicative of a state of readiness or expectancy.
Cessation of heart beat or MYOCARDIAL CONTRACTION. If it is treated within a few minutes, heart arrest can be reversed in most cases to normal cardiac rhythm and effective circulation.
A state of prolonged irreversible cessation of all brain activity, including lower brain stem function with the complete absence of voluntary movements, responses to stimuli, brain stem reflexes, and spontaneous respirations. Reversible conditions which mimic this clinical state (e.g., sedative overdose, hypothermia, etc.) are excluded prior to making the determination of brain death. (From Adams et al., Principles of Neurology, 6th ed, pp348-9)
The electric response evoked in the CEREBRAL CORTEX by ACOUSTIC STIMULATION or stimulation of the AUDITORY PATHWAYS.
Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain.
A scale that assesses the response to stimuli in patients with craniocerebral injuries. The parameters are eye opening, motor response, and verbal response.
Multiple symptoms associated with reduced oxygen at high ALTITUDE.
A sport involving mountain climbing techniques.
A vertical distance measured from a known level on the surface of a planet or other celestial body.
Usually refers to planned scientific data-gathering excursions.
Multi-channel hearing devices typically used for patients who have tumors on the COCHLEAR NERVE and are unable to benefit from COCHLEAR IMPLANTS after tumor surgery that severs the cochlear nerve. The device electrically stimulates the nerves of cochlea nucleus in the BRAIN STEM rather than the inner ear as in cochlear implants.
Experimental devices used in inhalation studies in which a person or animal is either partially or completely immersed in a chemically controlled atmosphere.
One of the CARBONIC ANHYDRASE INHIBITORS that is sometimes effective against absence seizures. It is sometimes useful also as an adjunct in the treatment of tonic-clonic, myoclonic, and atonic seizures, particularly in women whose seizures occur or are exacerbated at specific times in the menstrual cycle. However, its usefulness is transient often because of rapid development of tolerance. Its antiepileptic effect may be due to its inhibitory effect on brain carbonic anhydrase, which leads to an increased transneuronal chloride gradient, increased chloride current, and increased inhibition. (From Smith and Reynard, Textbook of Pharmacology, 1991, p337)
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.
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.
Any sound which is unwanted or interferes with HEARING other sounds.
A common name used for the genus Cavia. The most common species is Cavia porcellus which is the domesticated guinea pig used for pets and biomedical research.
Abrupt changes in the membrane potential that sweep along the CELL MEMBRANE of excitable cells in response to excitation stimuli.
The branch of physics that deals with sound and sound waves. In medicine it is often applied in procedures in speech and hearing studies. With regard to the environment, it refers to the characteristics of a room, auditorium, theatre, building, etc. that determines the audibility or fidelity of sounds in it. (From Random House Unabridged Dictionary, 2d ed)
A technique in which electric pulses of intensity in kilovolts per centimeter and of microsecond-to-millisecond duration cause a temporary loss of the semipermeability of CELL MEMBRANES, thus leading to ion leakage, escape of metabolites, and increased uptake by cells of drugs, molecular probes, and DNA.
The genus Globicephala, in the family Delphinidae, consisting of two species of DOLPHINS. They are mostly black with a stocky shape and bulbous foreheads.
Large marine mammals of the order CETACEA. In the past, they were commercially valued for whale oil, for their flesh as human food and in ANIMAL FEED and FERTILIZERS, and for baleen. Today, there is a moratorium on most commercial whaling, as all species are either listed as endangered or threatened.
The species Balaenoptera physalus, in the family Balaenopteridae, characterized by a large, strongly curved, dorsal fin. It is the second largest of the WHALES, highly migratory, but rarely seen near the shore.
The species Delphinapterus leucas, in the family Monodontidae, found primarily in the Arctic Ocean and adjoining seas. They are small WHALES lacking a dorsal fin.
A genus of the family PARAMYXOVIRIDAE (subfamily PARAMYXOVIRINAE) where the virions of most members have hemagglutinin but not neuraminidase activity. All members produce both cytoplasmic and intranuclear inclusion bodies. MEASLES VIRUS is the type species.
Infections with viruses of the genus MORBILLIVIRUS, family PARAMYXOVIRIDAE. Infections mainly cause acute disease in their hosts, although in some cases infection is persistent and leads to degenerative conditions.
An order of wholly aquatic MAMMALS occurring in all the OCEANS and adjoining seas of the world, as well as in certain river systems. They feed generally on FISHES, cephalopods, and crustaceans. Most are gregarious and most have a relatively long period of parental care and maturation. Included are DOLPHINS; PORPOISES; and WHALES. (From Walker's Mammals of the World, 5th ed, pp969-70)
All of the divisions of the natural sciences dealing with the various aspects of the phenomena of life and vital processes. The concept includes anatomy and physiology, biochemistry and biophysics, and the biology of animals, plants, and microorganisms. It should be differentiated from BIOLOGY, one of its subdivisions, concerned specifically with the origin and life processes of living organisms.
A publication issued at stated, more or less regular, intervals.
A cyclohexanone derivative used for induction of anesthesia. Its mechanism of action is not well understood, but ketamine can block NMDA receptors (RECEPTORS, N-METHYL-D-ASPARTATE) and may interact with sigma receptors.
A bibliographic database that includes MEDLINE as its primary subset. It is produced by the National Center for Biotechnology Information (NCBI), part of the NATIONAL LIBRARY OF MEDICINE. PubMed, which is searchable through NLM's Web site, also includes access to additional citations to selected life sciences journals not in MEDLINE, and links to other resources such as the full-text of articles at participating publishers' Web sites, NCBI's molecular biology databases, and PubMed Central.
Lists of persons or organizations, systematically arranged, usually in alphabetic or classed order, giving address, affiliations, etc., for individuals, and giving address, officers, functions, and similar data for organizations. (ALA Glossary of Library and Information Science, 1983)
The affective response to an actual current external danger which subsides with the elimination of the threatening condition.
Loss of the ability to maintain awareness of self and environment combined with markedly reduced responsiveness to environmental stimuli. (From Adams et al., Principles of Neurology, 6th ed, pp344-5)
Sense of awareness of self and of the environment.
A graphic means for assessing the ability of a screening test to discriminate between healthy and diseased persons; may also be used in other studies, e.g., distinguishing stimuli responses as to a faint stimuli or nonstimuli.
A specialty concerned with the study of anesthetics and anesthesia.
An intravenous anesthetic agent which has the advantage of a very rapid onset after infusion or bolus injection plus a very short recovery period of a couple of minutes. (From Smith and Reynard, Textbook of Pharmacology, 1992, 1st ed, p206). Propofol has been used as ANTICONVULSANTS and ANTIEMETICS.
Ultrashort-acting anesthetics that are used for induction. Loss of consciousness is rapid and induction is pleasant, but there is no muscle relaxation and reflexes frequently are not reduced adequately. Repeated administration results in accumulation and prolongs the recovery time. Since these agents have little if any analgesic activity, they are seldom used alone except in brief minor procedures. (From AMA Drug Evaluations Annual, 1994, p174)

The magnitude and phase of temporal modulation transfer functions in cat auditory cortex. (1/1669)

Temporal modulation transfer functions (tMTFs) in response to periodic click trains are presented for simultaneous recordings from primary auditory cortex, anterior auditory field, and secondary auditory cortex in 21 cats. The multiunit records could be separated in to 215 single-unit spike trains that allowed a reliable estimate of a group delay, which represents the cumulative delay for responses to repetitive stimuli. For approximately two-thirds of the 215 single units the group delay was within 7.5 msec of the response latency to the first clicks in the trains. For the remaining units, the group delay was on average approximately 14 msec higher, and this may result from differences in synaptic properties. These findings were similar in the three cortical areas studied. The findings are modeled based on presynaptic facilitation and depression and pyramidal cell calcium kinetics, and a quantitative description of the magnitude of the tMTF was obtained that resulted in substantially shorter depression time constants (20 msec) than reported for visual cortex (300 msec). A small amount (0-5.5%) of facilitation that decayed with a time constant of 60 msec was obtained. Auditory cortical cells apparently have much faster recovery mechanisms than visual cortical cells. This allows for the ability of the auditory cortex to reliably track the rhythms that occur in natural sounds.  (+info)

Comparison of the effects of halothane, isoflurane and methoxyflurane on the electroencephalogram of the horse. (2/1669)

We have investigated in eight ponies the effects of three different end-tidal concentrations of halothane, isoflurane and methoxyflurane on median (F50) and 95% spectral edge (F95) frequencies of the EEG and the second differential (DD) of the middle latency auditory evoked potential (MLAEP). The three concentrations of each agent were chosen to represent approximately the minimum alveolar concentration (MAC), 1.25 MAC and 1.5 MAC for each agent. During halothane anaesthesia, F95 decreased progressively as halothane concentration increased, from mean 13.9 (SD 2.6) at 0.8% to 11.9 (1.1) at 1.2%. DD was lower during anaesthesia with the highest concentration (21 (6.5)) compared with the lowest (27.6 (11.4)). There were no significant changes in F50. During isoflurane anaesthesia, there was a small, but significant increase in F95 between the intermediate and highest concentrations (10.2 (1.5) to 10.8 (1.6)). There were no changes in F50 and DD. Values of F95, F50 and DD at all isoflurane concentrations were similar to those of halothane at the highest concentration. During methoxyflurane anaesthesia, F95 and F50 decreased progressively as methoxyflurane concentration was increased, from 21.3 (0.7) and 6.5 (1), respectively, at 0.26%, to 20.1 (0.6) and 5.6 (0.8), respectively, at 0.39%. DD was lower during anaesthesia with the highest concentration of methoxyflurane (25.7 (7.8)) compared with the lowest (39.7 (20.6)). Values of F95, F50 and DD at all methoxyflurane concentrations were higher than those seen with halothane at the lowest concentration. The different relative positions of the dose-response curves for EEG and MLAEP changes compared with antinociception (MAC) changes suggest differences in the mechanisms of action of these three agents. These differences may explain the incomplete adherence to the Meyer-Overton rule.  (+info)

Effect of remifentanil on the auditory evoked response and haemodynamic changes after intubation and surgical incision. (3/1669)

We have observed the effect of intubation and incision, as measured by the auditory evoked response (AER) and haemodynamic variables, in 12 patients undergoing hernia repair or varicose vein surgery who received remifentanil as part of either an inhaled anaesthetic technique using isoflurane or as part of a total i.v. technique using propofol. Anaesthesia was induced with remifentanil 1 microgram kg-1 and propofol, neuromuscular block was achieved with atracurium 0.6 mg kg-1 before intubation, and anaesthesia was maintained with a continuous infusion of remifentanil in combination with either a continuous infusion of propofol or inhaled isoflurane. The AER and haemodynamic variables were measured before and after intubation and incision. The effects of intubation and incision on the AER and haemodynamic variables were not significantly different between the remifentanil-propofol and remifentanil-isoflurane groups. However, the study had a low power for this comparison. When the data for the two anaesthetic combinations were pooled, the only significant effects were increases in diastolic arterial pressure and heart rate immediately after intubation; these were not seen 5 min after intubation. There were no cardiovascular responses to incision. There were no significant changes in the AER after intubation or incision.  (+info)

The role of the hippocampus in auditory processing studied by event-related electric potentials and magnetic fields in epilepsy patients before and after temporal lobectomy. (4/1669)

To clarify the relationship between the hippocampus and the event-related responses in auditory information processing, we recorded event-related potentials (ERPs) and event-related magnetic fields (ERFs) associated with the auditory oddball paradigm in 12 patients with temporal lobe epilepsy before and after surgical treatment, and in eight age-matched healthy volunteers. Lesions in the patients were hippocampal sclerosis (8), cyst (2), cavernoma (1) and calcified arteriovenous malformation (1), all in the unilateral temporal lobe. Standard temporal lobectomy (8), selective amygdalohippocampectomy (2), selective hippocampectomy (1) and inferior lateral temporal resection (1) were carried out. ERPs were recorded in nine patients before surgery, in all 12 patients after surgery, and in all normal subjects. P300 was maximal at Pz in the patients both before and after surgery, and in normal subjects. The peak latency and amplitude of P300 measured at Pz in the patients either before or after surgery did not differ significantly from those in normal subjects. After surgery, only the amplitude of P300 over the anterior and mid-temporal area on the resected side was attenuated, while it was symmetric before surgery regardless of the side of epileptogenic focus. ERFs were recorded in three patients before surgery and in six normal subjects by using a whole-head neuromagnetometer. ERFs in response to the target stimuli at a latency of approximately 400 ms were recognized at the anterior, middle and posterior lateral channels on each hemisphere (M400). The latency and dipole moments for M400 did not differ significantly between the patients before surgery and the normal subjects. As a result of analysis using the time-varying multidipole model, three dipoles for M400 were estimated in two patients in whom ERFs were available before surgery for the analysis, and in normal subjects: mesial temporal area, superior temporal area and inferior parietal area on each hemisphere. After surgery, in four out of six patients in whom ERFs were recordable, M400 at the anterior temporal channels on the resected side disappeared, and the activity in the affected mesial temporal area was lost. In one patient who underwent inferior lateral temporal resection, M400 waveforms and its sources were preserved in all regions. There were no significant differences in the latency and dipole moments of the unaffected source of M400 before versus after surgery. These results suggest that the hippocampus contributes to the scalp-recorded P300 only at the corresponding anterior temporal region, and does not influence its general waveform and predominant distribution over the scalp.  (+info)

Auditory event-related potentials (P300) in partial and generalized epileptic patients. (5/1669)

We evaluated the P300 components of event-related potentials (ERP) in 64 cryptogenic partial epilepsy (CPE) patients, and 52 idiopathic generalized epilepsy (IGE) patients as well as in their age-matched control groups. The P200, N200 and P300 latencies recorded from Cz were significantly longer in CPE patients compared with those of their control group (P = 0.0371, P = 0.0092 and P = 0.0405, respectively). The P200 and N200 latencies recorded from Fz were significantly longer than in their control group (P = 0.0448 and P = 0.0107) while the prolongation in the P300 latencies was not found to be statistically significant (P = 0.0733). All latencies were longer in IGE patients, and the amplitudes of the N200/P300 components of ERP were lower in both epileptic groups compared with their control groups, but these differences were not significant. The prolongation of the P300 latencies was not correlated with the type or serum level of antiepileptic drug or seizure control. Our findings suggest that the prolongation of the P300 latency of ERP is related to the type of epilepsy.  (+info)

Identification of causal relations between haemodynamic variables, auditory evoked potentials and isoflurane by means of fuzzy logic. (6/1669)

The aim of this study was to identify a possible relationship between haemodynamic variables, auditory evoked potentials (AEP) and inspired fraction of isoflurane (ISOFl). Two different models (isoflurane and mean arterial pressure) were identified using the fuzzy inductive reasoning (FIR) methodology. A fuzzy model is able to identify non-linear and linear components of a causal relationship by means of optimization of information content of available data. Nine young female patients undergoing hysterectomy under general anaesthesia were included. Mean arterial pressure (MAP), heart rate (HR), end-tidal expired carbon dioxide (CO2ET), AEP and ISOFl were monitored with a sampling time of 10 s. The AEP was extracted using an autoregressive model with exogenous input (ARX model) which decreased the processing time compared with a moving time average. The AEP was mapped into a scalar, termed the depth of anaesthesia index (DAI) normalized to 100 when the patient was awake and descending to an average of 25 during loss of consciousness. The FIR methodology identified those variables among the input variables (MAP, HR, CO2ET, DAI or ISOFl) that had the highest causal relation with the output variables (ISOFl and MAP). The variables with highest causal relation constitute the ISOFl and MAP models. The isoflurane model predicted the given anaesthetic dose with a mean error of 12.1 (SD 10.0)% and the mean arterial pressure model predicted MAP with a mean error of 8.5 (7.8)%.  (+info)

Click evoked myogenic potentials in the differential diagnosis of acute vertigo. (7/1669)

OBJECTIVE: In response to loud clicks, a vestibular evoked potential can be recorded from sternocleidomastoid muscles, called "click evoked myogenic potential" (CEMP). This paper reports on the usefulness of CEMP in the differential diagnosis of acute vertigo of presumed vestibular origin. METHODS: CEMP was examined in 40 patients with acute vertigo of vestibular origin (26 with acute peripheral vestibulopathy, five with Meniere's disease, three with benign paroxysmal positioning vertigo (BPPV), six with psychogenic vertigo) and the results compared with standard caloric reaction (CR). For CEMPs, clicks were delivered unilaterally via a pair of headphones. EMG activity was collected by surface electrodes placed on the sternocleidomastoid belly and averaged. RESULTS: In 29 patients, CR was unilaterally abnormal, pointing to a peripheral vestibular lesion. Seventeen of them had a corresponding loss of CEMPs; the other 12 patients had a normal CEMP. The remaining 11 patients had normal results in both tests. In comparison with CR, CEMP showed a sensitivity of 59% and a specificity of 100% for peripheral vestibular disorders. CONCLUSION: CR is a test of the horizontal canal whereas CEMP is thought to be a sacculus test. Different results of CR and CEMP may be due to this difference between target organs stimulated and may be of prognostic value.  (+info)

Cortical auditory signal processing in poor readers. (8/1669)

Magnetoencephalographic responses recorded from auditory cortex evoked by brief and rapidly successive stimuli differed between adults with poor vs. good reading abilities in four important ways. First, the response amplitude evoked by short-duration acoustic stimuli was stronger in the post-stimulus time range of 150-200 ms in poor readers than in normal readers. Second, response amplitude to rapidly successive and brief stimuli that were identical or that differed significantly in frequency were substantially weaker in poor readers compared with controls, for interstimulus intervals of 100 or 200 ms, but not for an interstimulus interval of 500 ms. Third, this neurological deficit closely paralleled subjects' ability to distinguish between and to reconstruct the order of presentation of those stimulus sequences. Fourth, the average distributed response coherence evoked by rapidly successive stimuli was significantly weaker in the beta- and gamma-band frequency ranges (20-60 Hz) in poor readers, compared with controls. These results provide direct electrophysiological evidence supporting the hypothesis that reading disabilities are correlated with the abnormal neural representation of brief and rapidly successive sensory inputs, manifested in this study at the entry level of the cortical auditory/aural speech representational system(s).  (+info)

Many researchers have investigated the possibility of using auditory evoked potentials (AEPs) to objectively diagnose tinnitus. Published AEP studies ..
An engaging Q & A format is used to discuss how auditory evoked-related potentials can help understand the cognitive factors involved in word recognition. 12731 AudiologyOnline Article
TY - JOUR. T1 - Beamformer reconstruction of correlated sources using a modified source model. AU - Brookes, Matthew J. AU - Stevenson, Claire M. AU - Barnes, Gareth R. AU - Hillebrand, Arjan. AU - Simpson, Michael I G. AU - Francis, Susan T. AU - Morris, Peter G. PY - 2007/2/15. Y1 - 2007/2/15. N2 - This paper introduces a lead field formulation for use in beamformer analysis of MEG data. This dual source beamformer is a technique to image two temporally correlated sources using beamformer methodology. We show that while the standard, single source beamformer suppresses the reconstructed power of two spatially separate but temporally correlated sources, the dual source beamformer allows for their accurate reconstruction. The technique is proven to be accurate using simulations. We also show that it can be used to image accurately the auditory steady state response, which is correlated between the left and right auditory cortices. We suggest that this technique represents a useful way of ...
Cognitive disorders involve disturbances in information processing and integration associated with cognitive impairment and/or progressive cognitive decline. These disorders can be studied using translational EEG biomarkers that represent powerful assets to assess procognitive or anti-psychotic treatments efficacy. Our programs feature expertise in developping models of cognitive impairment, validating appropriate methods that seamlessly translate into the clinic (Auditory-evoked potentials, pharmaco-induced models) and skills in analysing complex data sets.. ...
Working together to unlock your potential index Introduction Equine Studies pote ntial Page Why choose Oaklands College?...1 New and improved facilities... Come and join the Oaklands Community...5
TY - JOUR. T1 - The use of middle latency response in the diagnosis of cortical deafness. AU - Vedder, J. S.. AU - Barrs, D. M.. AU - Fifer, Robert. PY - 1988/1/1. Y1 - 1988/1/1. N2 - Bilateral cortical lesions resulting in true deafness were first reported approximately 100 years ago. A detailed map of the auditory cortex, however, was derived only within the past 50 years, primarily from investigation in the cat and subhuman primate. The few human studies have shown the primary auditory cortex to be located around the posterior two-thirds of the sylvian fissure, especially in the anterior and posterior transverse temporal gyri -or Heschls gyri- on the superior portion of the temporal lobe. Each organ of Corti has extensive bilateral projections to the primary auditory cortex, although experiments by Celesia have shown larger contralateral than ipsilateral response to auditory stimulation. This bilateral distribution of ascending auditory pathways makes deafness secondary to a single cortical ...
TY - JOUR. T1 - Negative correlation of reaction times and the auditory P50 in a Go, No- Go paradigm. AU - Ninomiya, Hideaki. AU - Onitsuka, Toshiaki. AU - Chen, Chung H.O.. PY - 1997/1/1. Y1 - 1997/1/1. N2 - We investigated the relationship between reaction times in a Go, No-Go paradigm and various components of the auditory event-related potentials. The P50 latencies in the Go trials were significantly earlier than those in the No-Go trials. The N200 and P300 were positively associated with the reaction times. However, the P50 latencies showed negative correlation with the reaction times, and the negative correlation at F3 was the largest. Referring to source studies on P50, it is suggested that the activation of either the ascending activating system or the left premotor area through that system might affect the speed of reaction.. AB - We investigated the relationship between reaction times in a Go, No-Go paradigm and various components of the auditory event-related potentials. The P50 ...
The human P1 middle latency evoked potential is postulated to be generat- ed in the thalamus by a cholinergic component of the ascending reticular activating system. To test the midbrain function of dentatorubral-pallidoluysian atrophy (DRPLA), recording of middle latency response to click stimuli were carried out in a DRPLA family which was detected with the aid of molecular diagnosis. Comparisons between the DRPLA members and the normal members indicated normal Pa responses but P1 component is abnormal in DRPLA. This P1 abnormality suggests that the midbrain cholinergic cells in DRPLA may be dysfunctional ...
13. Joint committee on infant hearing of the american academy of pediatrics, Muse C, Harrison J, Yoshinaga-Itano C, Grimes A, Brookhouser PE, et al. Supplement to the JCIH 2007 position statement: principles and guidelines for early intervention after confirmation that a child is deaf or hard of hearing. Pediatrics. 2013;131(4):e1324-49. doi: 10.1542/peds.2013- ...
Magnetoencephalography (MEG) is used to measure the auditory evoked magnetic field (AEF), which reflects language-related performance. In young children, however, the simultaneous quantification of the bilateral auditory-evoked response during binaural hearing is difficult using conventional adult-sized MEG systems. Recently, a child-customised MEG device has facilitated the acquisition of bi-hemispheric recordings, even in young children. Using the child-customised MEG device, we previously reported that language-related performance was reflected in the strength of the early component (P50m) of the auditory evoked magnetic field (AEF) in typically developing (TD) young children (2 to 5 years old) [Eur J Neurosci 2012, 35:644-650]. The aim of this study was to investigate how this neurophysiological index in each hemisphere is correlated with language performance in autism spectrum disorder (ASD) and TD children. We used magnetoencephalography (MEG) to measure the auditory evoked magnetic field (AEF),
A major challenge for sensory processing in the brain is considering stimulus context, such as stimulus probability, which may be relevant for survival. Excitatory neurons in auditory cortex, for example, adapt to repetitive tones in a stimulus-specific manner without fully generalizing to a low-probability deviant tone (oddball) that breaks the preceding regularity. Whether such stimulus-specific adaptation (SSA) also prevails in inhibitory neurons and how it might relate to deviance detection remains elusive. We obtained whole-cell recordings from excitatory neurons and somatostatin- and parvalbumin-positive GABAergic interneurons in layer 2/3 of mouse auditory cortex and measured tone-evoked membrane potential responses. All cell types displayed SSA of fast (early) subthreshold and suprathreshold responses with oddball tones of a deviant frequency eliciting enlarged responses compared with adapted standards. SSA was especially strong when oddball frequency matched neuronal preference. In ...
en] The identification of the brain structures and neurotransmitters responsible for the generation and/or modulation of the mismatch negativity (MMN) may contribute to a clearer understanding of its functional significance, and may have clinical implications. In this context, some findings suggest that the scalp-recorded MMN reflects activity from multiple neuronal ensembles within or in the immediate vicinity of the primary auditory cortex and with possible contribution from the frontal cortex. However, few data are available concerning the influence of neurotransmitter systems on the MMN. In this study, the relationship between both noradrenergic and dopaminergic systems and the MMN were investigated in 34 healthy volunteers. Noradrenergic and dopaminergic activities were assessed with the apomorphine and clonidine challenge tests. The results showed no significant relationship between either growth hormone (GH) responses to apomorphine or clonidine and the MMN amplitude or latency. ...
misc{7456066, abstract = {In the pursuit of a system capable of measuring pain signals in humans we propose a method to differentiate those signals related to pain from those which are not. We performed a time-frequency analysis using the Gabor transform to have complete information about the spectrum and its behaviour through the time to study the main differences over the evoked potentials provoked by both nociceptive and somatosensory (non-nociceptive) stimulation. The setup of the experiment also allowed us to study the mismatch negativity and the differences between the potentials evoked by a deviant stimulus and the ones evoked by a standard stimulus according to the roving paradigm. The results show that nociceptive evoked potentials read over the scalp have more energy than the somatosensory evoked potentials, they also differ in the frequencies that are activated as well as the latencies where such frequencies are activated. These results were obtained after pre-processing the EEG ...
We quantified the oddball effect by comparing the amplitude of early and late Vm responses for pre-oddball and oddball stimuli as well as for the first standard stimulus in trial blocks. Early Vm peak amplitudes were significantly enhanced for oddball compared with pre-oddball stimuli for all cell types (Fig. 3E; by a factor of 3.7, 3.1, and 3.7 for Exc, SST, and PV neurons, respectively; p , 0.01; n = 20, 20, 12). For the late component a significant fourfold to fivefold enhancement of the mean Vm amplitude was observed for Exc and PV neurons (p , 0.05, paired t test). Despite this enhancement, oddball Vm responses were, however, generally ∼20-35% smaller than the responses to the first stimulus. Our finding is consistent with a synaptic mechanism underlying SSA, with deviant tones recovering neuronal activity by recruiting distinct, largely nonadapted afferent pathways together with afferents partially overlapping with those adapted by the standard tone.. We also analyzed the selectivity of ...
All CAEP clinical practice guidelines and endorsements follow a standardized path to ensure quality and acceptance. Please submit your thoughts/ideas for new CAEP guidelines to to Shanna Scarrow at [email protected] who will guide you through the process. Please submit your endorsements to Sara Alfazema at [email protected] ...
The Workforce Coordination Center (WCC) is looking for individuals who want to help the states response to the COVID-19 crisis.
It has been proposed that specific language impairment (SLI) is the consequence of low-level abnormalities in auditory perception. However, studies of long-latency auditory ERPs in children with SLI have generated inconsistent findings. A possible reason for this inconsistency is the heterogeneity of SLI. The intraclass correlation (ICC) has been proposed as a useful statistic for evaluating heterogeneity because it allows one to compare an individuals auditory ERP with the grand average waveform from a typically developing reference group. We used this method to reanalyse auditory ERPs from a sample previously described by Uwer, Albrecht and von Suchodoletz (2002). In a subset of children with receptive SLI, there was less correspondence (i.e. lower ICC) with the normative waveform (based on the control grand average) than for typically developing children. This poorer correspondence was seen in responses to both tone and speech stimuli for the period 100-228 ms post stimulus onset. The effect was
This work was supported, in part, by Institute of Educational Sciences Grant R324A110266 to Vanderbilt University (Nashville, TN; awarded to Fred H. Bess) and National Institute of Child Health & Human Development Grants P30 HD15052 and U54 HD083211 to Vanderbilt Kennedy Center. This research was also supported by the Dan and Margaret Maddox Charitable Fund. The content expressed is that of the authors and do not necessarily represent official views of the Institute of Educational Sciences, the U.S. Department of Education, or the National Institutes of Health. Data management was supported, in part, by the Vanderbilt Institute for Clinical and Translational Research (UL1 TR000445 from National Center for Advancing Translational Services and National Institutes of Health). We thank Dorita Jones for assistance with event-related potential data processing, as well as students and study staff who assisted in participant recruitment and data collection, including Nick Bennett, Hilary Davis, Andy ...
The P3 wave is one cognitive component of event-related potentials (ERP) used to investigate various types of dementia. The aim of this study was to use the odd-ball paradigm to evaluate the P3 in Huntingtons Disease (HD) gene carriers who showed no symptoms of chorea, compared to a group of mildly affected HD patients. We selected 14 HD patients and six individuals who, despite testing positive for the HD gene, did not show any clinical evidence of the disease. Thirty-six normal subjects were also selected as controls. Statistical evaluation of N1, P2, N2 and P3 latencies and amplitudes was performed in each group. Both the N2 latency and the P3 latency corrected for age (cP3) were significantly correlated with the duration of illness in pooled symptomatic and presymptomatic gene carriers. However, these latencies did not correlate with any clinical scale or psychometric test, including WAIS subtests. As the individual P3 latency of the majority of HD patients and all presymptomatic gene ...
A mathematical model of cochlear processing is developed to account for the nonlinear dependence of frequency selectivity on intensity in inner hair cell and auditory nerve fiber responses. The model describes the transformation from acoustic stimulus to intracellular hair cell potentials in the cochlea. It incorporates a linear formulation of basilar membrane mechanics and subtectorial fluid-cilia displacement coupling, and simplified description of the inner hair cell nonlinear transduction process. The analysis at this stage is restricted to low-frequency single tones. The computed responses to single tone inputs exhibit the experimentally observed nonlinear effects of increasing intensity such as the increase in the bandwidth of frequency selectivity and the downward shift of the best frequency. In the model, the first effect is primarily due to the saturating effect of the hair cell nonlinearity. The second results from the combined effects of both the nonlinearity and the inner hair cell ...
OBJECTIVE: Validate independent component analysis (ICA) for removal of EMG contamination from EEG, and demonstrate a heuristic, based on the gradient of EEG spectra (slope of graph of log EEG power vs log frequency, 7-70 Hz) from paralysed awake humans, to automatically identify and remove components that are predominantly EMG. METHODS: We studied the gradient of EMG-free EEG spectra to quantitatively inform the choice of threshold. Then, pre-existing EEG from 3 disparate experimental groups was examined before and after applying the heuristic to validate that the heuristic preserved neurogenic activity (Berger effect, auditory odd ball, visual and auditory steady state responses). RESULTS: (1) ICA-based EMG removal diminished EMG contamination up to approximately 50 Hz, (2) residual EMG contamination using automatic selection was similar to manual selection, and (3) task-induced cortical activity remained, was enhanced, or was revealed using the ICA-based methodology. CONCLUSION: This study further
Honing, H., Merchant, H., Háden, G.P., Prado, L. & Bartolo, R. (2012). Rhesus monkeys (Macaca mulatta) detect rhythmic groups in music, but not the beat. PLoS ONE, 7(12): e51369. doi: 10.1371/journal.pone.0051369 It was recently shown that rhythmic entrainment, long considered a human-specific mechanism, can be demonstrated in a selected group of bird species, and, somewhat surprisingly, not in more closely related species such as nonhuman primates. This observation supports the vocal learning hypothesis that suggests rhythmic entrainment to be a by-product of the vocal learning mechanisms that are shared by several bird and mammal species, including humans, but that are only weakly developed, or missing entirely, in nonhuman primates. To test this hypothesis we measured auditory event-related potentials (ERPs) in two rhesus monkeys (Macaca mulatta), probing a well-documented component in humans, the mismatch negativity (MMN) to study rhythmic expectation. We demonstrate for the first time in ...
CiteSeerX - Scientific documents that cite the following paper: Probabilistic mapping and volume measurement of human primary auditory cortex.
Recent evidence from magnetoencephalographic (MEG) studies in ASD have pointed to abnormalities (specifically, delays) in auditory evoked neuromagnetic responses (e.g. M100 - see Roberts et al., 2010, and mismatch field, MMF - see Roberts et al., 2011) as well as abnormalities in the oscillatory behavior of auditory cortex, especially in the gamma band (30-50Hz), at rest and in response to simple auditory stimuli (see Gandal et al., 2010 and Cornew et al., 2012; Edgar et al., 2013). The local circuitry underlying such evoked activity and oscillations, and synaptic transmission in general, requires an appropriate balance of excitation and inhibition, mediated by glutamate and GABA, respectively. One model of the neural oscillatory deficits in ASD suggests that impaired regulatory control by inhibitory interneurons onto pyramidal cells underlies abnormal auditory latency and oscillatory electrophysiological measures. As such, electrophysiological deficits are interpreted in terms of local ...
O'Donoghue T, Morris DW, Fahey C, Da Costa A, Moore S, Cummings E, Leicht G, Karch S, Hoerold D, Tropea D, Foxe JJ, Gill M, Corvin A, Donohoe G, Effects of ZNF804A on auditory P300 response in schizophrenia., Translational psychiatry, 4, 2014, e345 ...
The response of a simply supported semi-infinite Timoshenko beam on an elastic foundation to a moving step load is determined. The response is found from summing the solutions to two mutually complementary sets of governing equations. The first solution is a particular solution to the forced equations of motion. The second solution is a solution to a set of homogeneous equations of motion and nonhomogeneous boundary conditions so formulated as to satisfy the initial and boundary conditions of the actual problem when the two solutions are summed. As a particular solution, the steady-state solution is used which is the motion that would appear stationary to an observer traveling with the load. Steady-state solutions are developed in Part 1 of this article for all load speeds greater than zero. It is shown that a steady-state solution which is identically zero ahead of the load front exists at every load speed, in the sense of generalized functions, including the critical speeds when the load ...
CAEP Notes includes clinical tools and resources intended for use by healthcare professionals. These tools do not give professional advice; physicians and other healthcare professionals who use these tools or databases should exercise their own clinical judgment as to the information they provide. The contents of the CAEP Notes tool, such as text, graphics and images are for informational purposes only. While information on this site has been obtained from sources believed to be reliable, CAEP and its partners do not warrant the accuracy of the information contained on this site.. ...
Human brain hemispheres are asymmetric. Individual anatomical differences involve widespread cortical and subcortical areas and are more prominent among males [1,2]. The interhemispheric asymmetry is...
The theory and application of control engineering will be discussed. System Modelling: Linear, nonlinear, time invariant, regulator and servomechanisms. Modelling system dynamics by transfer functions, block diagrams, state models. System Response: Transient response of second order systems. Steady state response, steady state errors, frequency response. Stability: simple stability tests, Routh Hurwitz, root locus, Bode and Nyquist. Methods used for design and compensation of control systems such as PID, Ziegler-Nichols tuning rules, lead and lag compensator will be examined. MATLAB software package will be used for control system design and analysis.. ...
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Methods of preparing compositions for preferential distribution of active agents to injury sites are provided. The compositions may comprise a polymer with hydrophilic properties and one or more activ
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Sociologists stress that the definition of what is deviant varies from time to time and from place to place. Some people feel that our society is moving toward regarding cigarette smoking as deviant. Do you agree? If so, how is.
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Report on the Computational Auditory Scene Analysis Workshop Malcolm Slaney, Dan Ellis, Dave Rosenthal Montreal, Quebec, Canada, August 19 and 20th, 1995. The first workshop on Computational Auditory Scene Analysis (CASA) was held August 19 and 20th at the 1995 IJCAI (International Joint Conference on Artificial Intelligence) in Montreal. Organized by Hiroshi Okuno and David Rosenthal, the workshop was attended by about thirty people doing work on scientific and engineering models of human audition and signal processing. Perhaps the workshop will best be remembered as the largest gathering to date of people interested in computer models of auditory scene analysis (ASA). The attendees were nearly evenly split between those that are interested in understanding human auditory perception and those that want to solve problems in auditory perception, perhaps using some of the techniques of auditory scene analysis. Al Bregman served as keynote speaker for the conference. His book, Auditory Scene ...
Background It is postulated that alteration of central cholinergic transmission plays an important role in the mechanism by which anesthetics produce unconsciousness. The authors investigated the effect of altering central cholinergic transmission, by physostigmine and scopolamine, on unconsciousness produced by propofol. Methods Propofol was administered to American Society of Anesthesiologists physical status 1 (n = 17) volunteers with use of a computer-controlled infusion pump at increasing concentrations until unconsciousness resulted (inability to respond to verbal commands, abolition of spontaneous movement). Central nervous system function was assessed by use of the Auditory Steady State Response (ASSR) and Bispectral Index (BIS) analysis of electrooculogram. During continuous administration of propofol, reversal of unconsciousness produced by physostigmine (28 microgram/kg) and block of this reversal by scopolamine (8.6 microgram/kg) were evaluated. Results Propofol produced ...
Individuals with schizophrenia have heterogeneous impairments of the auditory processing system that likely mediate differences in the cognitive gains induced by auditory training (AT). Mismatch negativity (MMN) is an event-related potential component reflecting auditory echoic memory, and its amplitude reduction in schizophrenia has been linked to cognitive deficits. Therefore, MMN may predict response to AT and identify individuals with schizophrenia who have the most to gain from AT. Furthermore, to the extent that AT strengthens auditory deviance processing, MMN may also serve as a readout of the underlying changes in the auditory system induced by AT. Fifty-six individuals early in the course of a schizophrenia-spectrum illness (ESZ) were randomly assigned to 40 h of AT or Computer Games (CG). Cognitive assessments and EEG recordings during a multi-deviant MMN paradigm were obtained before and after AT and CG. Changes in these measures were compared between the treatment groups. Baseline and trait
Individuals with schizophrenia have heterogeneous impairments of the auditory processing system that likely mediate differences in the cognitive gains induced by auditory training (AT). Mismatch negativity (MMN) is an event-related potential component reflecting auditory echoic memory, and its amplitude reduction in schizophrenia has been linked to cognitive deficits. Therefore, MMN may predict response to AT and identify individuals with schizophrenia who have the most to gain from AT. Furthermore, to the extent that AT strengthens auditory deviance processing, MMN may also serve as a readout of the underlying changes in the auditory system induced by AT. Fifty-six individuals early in the course of a schizophrenia-spectrum illness (ESZ) were randomly assigned to 40 h of AT or Computer Games (CG). Cognitive assessments and EEG recordings during a multi-deviant MMN paradigm were obtained before and after AT and CG. Changes in these measures were compared between the treatment groups. Baseline ...
TY - JOUR. T1 - Associative learning shapes the neural code for stimulus magnitude in primary auditory cortex. AU - Polley, Daniel B.. AU - Heiser, Marc A.. AU - Blake, David T.. AU - Schreiner, Christoph E.. AU - Merzenich, Michael M.. PY - 2004/11/16. Y1 - 2004/11/16. N2 - Since the dawn of experimental psychology, researchers have sought an understanding of the fundamental relationship between the amplitude of sensory stimuli and the magnitudes of their perceptual representations. Contemporary theories support the view that magnitude is encoded by a linear increase in firing rate established in the primary afferent pathways. In the present study, we have investigated sound intensity coding in the rat primary auditory cortex (AI) and describe its plasticity by following paired stimulus reinforcement and instrumental conditioning paradigms. In trained animals, population-response strengths in AI became more strongly nonlinear with increasing stimulus intensity. Individual AI responses became ...
Changes of two components of the auditory event-related potential, the evoked 40-Hz response and the N350, were studied during different stages of wakefulness and sleep. The evoked 40-Hz response has been proposed to represent an attention-modulating mechanism; the N350 seems to reflect an inhibitory process associated with reduced information processing. Because recent literature suggests that both components reflect opposite mechanisms, an inverse relationship was expected. Ten participants were presented with tone pips while reading, lying awake in bed, and during light sleep, slow wave sleep, and REM sleep. A significant evoked 40-Hz response was observed during reading and lying awake in bed. N350 was evident in all conditions and, as expected, peaked during light sleep. The hypothesized inverse relationship was confirmed. These findings support former proposals that relate both components to attention. Possibly, the N350 is most pronounced during the sleep transition period because its inhibitory
Selectively attending to task-relevant sounds whilst ignoring background noise is one of the most amazing feats performed by the human brain. Here, we studied the underlying neural mechanisms by recording magnetoencephalographic (MEG) responses of 14 healthy human subjects while they performed a near-threshold auditory discrimination task vs. a visual control task of similar difficulty. The auditory stimuli consisted of notch-filtered continuous noise masker sounds, and of 1020-Hz target tones occasionally () replacing 1000-Hz standard tones of 300-ms duration that were embedded at the center of the notches, the widths of which were parametrically varied. As a control for masker effects, tone-evoked responses were additionally recorded without masker sound. Selective attention to tones significantly increased the amplitude of the onset M100 response at 100 ms to the standard tones during presence of the masker sounds especially with notches narrower than the critical band. Further, attention ...
A novel method is presented for creating a probability map from histologically defined cytoarchitectonic data, customised for the anatomy of individual fMRI volunteers. Postmortem structural and cytoarchitectonic information from a published dataset is combined with high resolution structural MR images using deformable registration of a region of interest. In this paper, we have targeted the three sub-areas of the primary auditory cortex (located on Heschls gyrus); however, the method could be applied to any other cytoarchitectonic region. The resulting probability maps show a significantly higher overlap than previously generated maps using the same cytoarchitectonic data, and more accurately span the macroanatomical structure of the auditory cortex. This improvement indicates a high potential for spatially accurate fMRI analysis, allowing more reliable correlation between anatomical structure and function. We validate the approach using fMRI data from nine individuals, taken from a published ...
The basic morphological aspects of auditory cortex organization in different orders of eutherian mammals are considered in the present review. The modern data describing a partitioning of mammalian auditory cortex into subfields are presented. A detailed observation of the structural organization of primary auditory cortex is given, as well as a review of recent morphological data about secondary auditory areas. Another section describes the system of auditory cortical projections. The data are considered from the perspective of possible homologies existing between the auditory cortices in different mammalian species.
The review of research of event related potentials (ERPs) shows that the most common scientific observation is decrease of the P3b wave both in ADHD and…
Sex Differences in Gamma Band Functional Connectivity Between the Frontal Lobe and Cortical Areas During an Auditory Oddball Task, as Revealed by Imaginary Coherence Assessment
Fig. 2. Time, field frequency, and intensity dependence of the effect of TTFields on malignant melanoma (B16F1, left column) and glioma cell (F-98, right column) proliferation. A, the number of cells in untreated cultures (control; □) as compared with cultures treated with TTFields (▪). The number of cells at each time point (ODi) was normalized by the number of cells in the culture before initiation of treatment (OD0). The number of control cells is seen to roughly double every 24 h throughout the experiment. TTFields were applied for 24 h continuously (solid lines) at 100 kHz in the melanoma cultures and at 200 kHz in the glioma cultures. The increase in the number of treated melanoma (left) and glioma (right) cells over time is significantly smaller than control cells (P , 0.001). B, the effect of 24-h exposure to TTFields of increasing intensities. The magnitude of the effect is expressed using the TER. The inhibitory effect of the TTFields on proliferation increases with intensity in ...
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Examples of current source density (CSD) waveforms (A) and CSD maps (B). EEG data (SEPs) shown in Fig. 2 were subjected to CSD transformation. Isolatency dotte
This module continues the analysis of the response of a single-degree-of-freedom system to harmonic excitation by including the effects of viscous damping. The corresponding equations of motion are developed and concepts such as resonance, phase shift and steady-state response for damped systems are discussed. Numerical examples, interactive plots, and steps to create MapleSim simulations are included to enhance the learning experience.
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A popular method to judge the behavior of a system that has to make decisions is to come up with a measure of performance. Such a system could be a human, an animal, an artificial agent or a classification algorithm. In case of multiple decisions, e.g. between two classes, a straightforward measure is often the Accuracy (i.e., the rate of correct decisions). However, Accuracy is misleading when the true class distribution is unbalanced. This situation is not only common in natural environments, but also often intended experimentally (e.g. in oddball paradigms). Consider, e.g., a situation where we have 990 examples of class A and just 10 examples of class B. Even if we know nothing about how to separate the two classes, we are able to obtain an Accuracy of 99% if we always decide for class A. The problem gets even worse when we want to compare two situations with different class distributions (e.g. when distributions change over time). To deal with such difficulties a lot of measures exist, but ...
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Ladich, F., & Fay, R. R. (2013). Auditory evoked potential audiometry in fish. Reviews in fish biology and fisheries, 23(3), ... High levels of underwater sound create a potential hazard to marine and amphibious animals. The effects of exposure to ... High levels of underwater sound create a potential hazard to human divers. Guidelines for exposure of human divers to ...
Strain, G. M. (1992). "Brainstem auditory evoked potentials in veterinary medicine". British Veterinary Journal. 148 (4): 275-8 ... Strain, G. M. (1993). "Deafness assessment services by means of the brainstem auditory-evoked response". Journal of Veterinary ...
Chertoff, ME; Hecox, KE (March 1990). "Auditory nonlinearities measured with auditory-evoked potentials". The Journal of the ... is an evoked potential generated by periodic or nearly-periodic auditory stimuli. Part of the auditory brainstem response (ABR ... Burkard, R., Don, M., & Eggermont, J. J. Auditory evoked potentials: Basic principles and clinical application. Philadelphia: ... Moore EJ (1983). Bases of auditory brain-stem evoked responses. Grune & Stratton, Inc. Skoe, E; Kraus, N (June 2010). "Auditory ...
May include visual, auditory, or somatosensory evoked potentials. These record the electrical responses of the brain and spinal ... EMG and evoked potentials, and electrodiagnostic physician focuses mainly on nerve conduction studies, needle EMG, and evoked ... Evoked potentials: Diagnostic test evaluating specific tracts of the central and peripheral nervous system. ... Physiologists perform the majority of EEGs, evoked potentials and a portion of the nerve conduction studies. They are then ...
"CCHS Family Network". Long, K. J.; Allen, N. (October 1984). "Abnormal brain-stem auditory evoked potentials following Ondine's ... Long and Allen (1984) were the first to report the abnormal brainstem auditory evoked responses in an alcoholic woman who ... Other potential treatments for CHS include oxygen therapy and medicine for stimulating the respiratory system. Currently, ...
2010 - Human Auditory Evoked Potentials 2013 - Creature and Creator "Biography". Official Book Site. Retrieved 30 December 2018 ... and event-related potentials. In 1994 he accepted a full-time position at the Rotman Research Institute, at Baycrest Centre for ...
"Diminished N1 Auditory Evoked Potentials to Oddball Stimuli in Misophonia Patients". Frontiers in Behavioral Neuroscience. 8: ... In auditory-tactile synesthesia, certain sounds can induce sensations in parts of the body. For example, someone with auditory- ... An auditory test is another way to test for synesthesia. A sound is turned on and one will either identify it with a taste, or ... In another study, music-color is also prevalent at 18-41%.[citation needed] Some of the rarest are reported to be auditory- ...
Deafness in horses can be diagnosed by brainstem auditory evoked potential (BAEP), which is minimally invasive and requires no ... "Diagnosis of deafness in a horse by brainstem auditory evoked potential". Canadian Veterinary Journal. 47: 151-4. PMC 1345730. ... However, horses without "excessive white markings" can still have the potential to produce "high white" or distinctly spotted ... thus SW-1 and SW-2 probably do not have potential lethal characteristics. Some horses with the splashed white pattern have been ...
Sharma, A.; Dorman, M.F. (1999). "Cortical auditory evoked potential correlates of categorical perception of voice-onset time ... It was originally observed for auditory stimuli but now found to be applicable to other perceptual modalities. And what about ... Differences between event-related potentials recorded from the brain have been found to be correlated with differences in the ... Eriksson, Jan L.; Villa, Alessandro E.P. (2006). "Learning of auditory equivalence classes for vowels by rats". Behavioural ...
Auditory evoked potential Cochlea EEG Electrophysiology Ferraro, John A. (November 15, 2000). "Clinical Electrocochleography: ... The auditory nerve action potential, also called the compound action potential (CAP), is the most widely studied component in ... When a certain threshold potential is reached, the spiral ganglion neuron fires an action potential, which enters the auditory ... Moore EJ (1983). Bases of auditory brain-stem evoked responses. Grune & Stratton, Inc. Fromm B, et al. (1934-1935). "Studies in ...
Research measuring brain volume, P300 auditory evoked potentials, and intelligence shows a dissociation, such that both brain ... intelligence and auditory evoked potentials". Personality and Individual Differences. 17 (3): 357-367. doi:10.1016/0191-8869(94 ... and this in turn is used as a rough indicator of the potential intelligence of the organism. Cranial capacity is often tested ...
McFadden, D.; Champlin, CA (March 2000). "Comparison of auditory evoked potentials in heterosexual, homosexual, and bisexual ... The bisexual activist Robyn Ochs defines bisexuality as "the potential to be attracted-romantically and/or sexually-to people ... and sexual orientation should not be a focal point in potential relationships. LeVay, Simon (2017). Gay, Straight, and the ... psychologists have argued that same-sex attraction does not have adaptive value because it has no association with potential ...
"Post-withdrawal changes in middle-latency auditory evoked potentials in abstinent human alcoholics". Neurosci Lett. 268 (2): 57 ... A review of its pharmacology and clinical potential in the management of alcohol dependence after detoxification". Drugs. 53 (6 ... the opioid receptors may become favorable to any potential agonist. This places people with longer term and heavier substance ...
"Acoustically evoked potentials in two cephalopods inferred using the auditory brainstem response (ABR) approach" (PDF). ...
... auditory, and visual evoked and event-related potentials (P300)". Neuroscience Letters. 415 (2): 185-9. doi:10.1016/j.neulet. ...
Effects of rotation on the sleep state-dependent midlatency auditory evoked P50 potential in the human. Journal of Vestibular ... Hoyt, R. E., Lawson, B. D., McGee, H. A., Strompolis, M. L., & McClellan, M. A. (2009). Modafinil as a Potential Motion ... A study of motion-induced effects on the P50 potential (a measure of arousal) showed that subjects exposed to motion ... However, many stimulants possess addictive properties, which result in a high potential for substance abuse. Some stimulants ...
Jones, S.; Longe, O.; Pato, M.V. (1998). "Auditory evoked potentials to abrupt pitch and timbre change of complex tones: ... b) Auditory sensation evoked by the oscillation described in (a)." Sound can be viewed as a wave motion in air or other elastic ... Sensation due to stimulation of the auditory nerves and auditory centers of the brain, usually by vibrations transmitted in a ... The Human Auditory Cortex. Springer Handbook of Auditory Research. 43. pp. 351-390. doi:10.1007/978-1-4614-2314-0_13. ISBN 978- ...
Homozygous mutant animals displayed an abnormal brainstem auditory evoked potential, while females also had decreased ...
A. Cassvan in connection to techniques using brain auditory evoked potentials (BAEP). The paper "Brainstem auditory evoked ... potential studies in patients with tinnitus and/or vertigo" is a standard reference.[citation needed] He has published more ...
"Short latency somatosensory evoked potentials and brain-stem auditory evoked potentials in coma due to CNS depressant drug ... Brain-stem auditory evoked potentials demonstrate delayed interpeak latencies (IPLs) I-III, III-V and I-V. Toxic overdoses of ... In a New Zealand study (2003) of 200 deaths, Zopiclone, a benzodiazepine receptor agonist, had similar overdose potential as ... for the use of flumazenil in the management of benzodiazepine overdose as the risks in general outweigh any potential benefit ...
"Neuromagnetic source localization of auditory evoked fields and intracerebral evoked potentials: A comparison of data in the ... The N100 is a slow-developing evoked potential. From one to four years of age, a positive evoked potential, P100, is the ... Older children start to develop a negative evoked potential at 200 ms that dominates evoked potentials until adolescence; this ... The Mismatch negativity (MMN) is an evoked potential that occurs at roughly the same time as N100 in response to rare auditory ...
"Short latency somatosensory evoked potentials and brain-stem auditory evoked potentials in coma due to CNS depressant drug ... Brain-stem auditory evoked potentials demonstrate delayed interpeak latencies (IPLs) I-III, III-V and I-V. Toxic overdoses ... A potential hazard following withdrawal of certain benzodiazepines". JAMA: The Journal of the American Medical Association. 241 ... The EEG arousal response to auditory stimulation and to electric stimulation of the mesencephalic reticular formation, ...
There is also bedside testing for hearing loss using evoked auditory potentials and congenital heart defects using pulse ... screening program at the time of treatment availability presents the best opportunity for impacting optimal and potential ...
Electrical stimuli to the auditory nerve evoke a graded excitatory postsynaptic potential in the octopus cells. These EPSPs are ... Auditory nerve fibers, fibers that travel through the auditory nerve (also known as the cochlear nerve or eighth cranial nerve ... Briefly, there are around 30,000 auditory nerve fibres in each of the two auditory nerves. Each fiber is an axon of a spiral ... leading to even sharper tuning than seen in auditory nerve fibers. These cells are usually innervated only by a few auditory ...
... such as the auditory and visual cortex. Moreover, studies examining steady-state auditory-evoked potentials showed deficits in ... Another active area of research is the study of a variety of potential biomarkers that would be of invaluable help not only in ... A number of potential explanations have been proposed, including that alleles associated with schizophrenia risk confers a ... These studies suggest that cimiRNAs have the potential to be early and accurate biomarkers in a number of disorders including ...
"Maturation of auditory evoked potentials from 6 to 48 months: Prediction to 3 and 4 year language and cognitive abilities". ... Benasich was the first to link early deficits in rapid auditory processing to later impairments in language and cognition, thus ... Her research also suggests that rapid auditory processing ability may be used to identify and remediate infants at highest risk ... Pilot studies suggest that behavioral intervention in young infants can support and enhance language mapping and rapid auditory ...
Ladich, F., & Fay, R. R. (2013). Auditory evoked potential audiometry in fish. Reviews in Fish Biology and Fisheries, 23(3), ... In addition, all goldfish varieties have the potential to reach 5 inches (12.7 cm) in total length, with single-tailed breeds ...
Jones, S.; Longe, O.; Pato, M.V. (1998). "Auditory evoked potentials to abrupt pitch and timbre change of complex tones: ... b) Auditory sensation evoked by the oscillation described in (a)."[4] Sound can be viewed as a wave motion in air or other ... Sensation due to stimulation of the auditory nerves and auditory centers of the brain, usually by vibrations transmitted in a ... Cariani, Peter; Micheyl, Christophe (2012). "Toward a Theory of Information Processing in Auditory Cortex". The Human Auditory ...
... and cognitive evoked potential recordings. Other assessments include recordings of autonomic nervous system modalities such as ... Assessments include clinical EEG recordings, electrocardiograms, multi-channel EEG brain mapping as well as auditory, ... the Clinical Diagnostics and Research Centre full accreditation status as an electroencephalography and evoked potential ...
Owen MJ, Norcross-Nechay K, Howie VM (January 1993). "Brainstem auditory evoked potentials in young children before and after ... Aural atresia (a closed external auditory canal) also causes temporary auditory deprivation in young children. Hearing can be ... A number of computer-based auditory training programs exist for children with generalized Auditory Processing Disorders (APD). ... There are multiple auditory functions that rely on the computation of well calibrated inputs from the two ears. Chief among ...
... , like many forms of therapy, has the potential to be a highly culturally sensitive one. Empathy in general is an ... The sound environment the NICU provides can be disruptive, but music therapy can mask unwanted auditory stimuli and promote a ... Jones, J. D. (2005). A comparison of songwriting and lyric analysis techniques to evoke emotional change in a single session ... It's the added complexity to cultural empathy that comes from adding music that provides both the greater risk and potential to ...
... causing action potentials down the auditory nerve. The auditory nerve then leads to several layers of synapses at numerous ... Two types of gamma activity were found by Snyder & Large: induced gamma activity, and evoked gamma activity. Evoked gamma ... Role of right auditory cortex in fine pitch resolution[edit]. The primary auditory cortex is one of the main areas associated ... Auditory-motor interactions[edit]. Feedforward and feedback interactions[edit]. An auditory-motor interaction may be loosely ...
If the generator potential reaches threshold, a volley of action potentials (nerve impulses) are triggered at the first node of ... Torebjörk HE, Ochoa JL (December 1980). "Specific sensations evoked by activity in single identified sensory units in man". ... where they contribute to the auditory system and equilibrioception. In addition to this, mechanoreceptors aid Dionaea muscipula ... When a mechanoreceptor receives a stimulus, it begins to fire impulses or action potentials at an elevated frequency (the ...
They are called somatosensory evoked potentials when they are elicited by sensory (vs. cognitive or motor) event stimuli. The ... MEG also accurately pinpoints sources in primary auditory, somatosensory and motor areas. For creating functional maps of human ... Event-related potential positive and negative 10µ to 100µ Volts (µ is millionths) responses, measured via noninvasive ... in spite of the tight relationship between local field potentials (LFP) and blood oxygenation level dependent (BOLD) signals ...
At high concentrations, it had no effect on spontaneous or potassium evoked amino acid release.[45] ... Ketter TA, Manji HK, Post RM (October 2003). "Potential mechanisms of action of lamotrigine in the treatment of bipolar ... that measures auditory processing speed and calculation ability.[53] Another study reported that lamotrigine might be a safe ... Braga MF, Aroniadou-Anderjaska V, Post RM, Li H (March 2002). "Lamotrigine reduces spontaneous and evoked GABAA receptor- ...
Evoked potential. *Bereitschaftspotential. *P300. *Auditory evoked potential. *Somatosensory evoked potentials. *Visual evoked ... The tensor tympani arises from the cartilaginous portion of the auditory tube and the osseous canal of the sphenoid and, having ... in intensity of the evoked OAE [20]. All results were however reported only as group averages, and no attempt was made to ... transient evoked otoacoustic emission (TEOAE) and distortion product otoacoustic emission (DPOAE). In a recent US patent issued ...
Research measuring brain volume, P300 auditory evoked potentials, and intelligence shows a dissociation, such that both brain ... intelligence and auditory evoked potentials". Personality and Individual Differences. 17 (3): 357-367. doi:10.1016/0191-8869(94 ... and this in turn is used as a rough indicator of the potential intelligence of the organism. Cranial capacity is often tested ...
An evoked response study of congenitally deaf kittens used local field potentials to measure cortical plasticity in the ... which includes primary auditory cortex, A1), the belt (secondary auditory cortex, A2), and the parabelt (tertiary auditory ... The auditory cortex is the part of the temporal lobe that processes auditory information in humans and many other vertebrates. ... The auditory cortex is involved in tasks such as identifying and segregating "auditory objects" and identifying the location of ...
Brainstem auditory evoked potential. Evoked potentials. Negativity. Bereitschaftspotential. ELAN. N100. Visual N1. N170. N200. ... Epstein, Charles M. (1983). Introduction to EEG and evoked potentials. J. B. Lippincott Co. ISBN 978-0-397-50598-2. .. [page ... sensory event-related potentials, (3) brain stem potentials, and (4) cognitive event-related potentials. The performance of the ... Derivatives of the EEG technique include evoked potentials (EP), which involves averaging the EEG activity time-locked to the ...
The auditory effects of LSD may include echo-like distortions of sounds, changes in ability to discern concurrent auditory and ... Cohen, S. (1959). The therapeutic potential of LSD-25. A Pharmacologic Approach to the Study of the Mind, p251-258. ... meant to evoke the visual experience of an LSD trip. LSD had a strong influence on the Grateful Dead and the culture of " ... Changes in auditory and visual perception are also typical.[42][43]. Some sensory effects may include an experience of radiant ...
Auditory cortex[edit]. Located in the temporal lobe, the auditory cortex is the primary receptive area for sound information. ... This action potential then travels along afferent neurons to specific brain regions where it is processed and interpreted.[5] ... and can evoke somatic sensations through electrical stimulation. Areas 1 and 2 receive most of their input from area 3. There ... The auditory cortex is composed of Brodmann areas 41 and 42, also known as the anterior transverse temporal area 41 and the ...
"Auditory Roughness as Means of Musical Expression". Selected Reports in Ethnomusicology, 12: 119-44. ... One component of dissonance-the uncertainty or confusion as to the virtual pitch evoked by an interval or chord, or the ... Composers in the Baroque era were well aware of the expressive potential of dissonance:. ... For fluctuation rates comparable to the auditory filter bandwidth, the degree, rate, and shape of a complex signal's amplitude ...
... has a potential for drug interactions; caution should be used in combining other medicines with it, including ... Tateno A, Sawada K, Takahashi I, Hujiwara Y (August 2006). "Carbamazepine-induced transient auditory pitch-perception deficit ... "Pharmacological discrimination between effects of carbamazepine on hippocampal basal, Ca(2+)- and K(+)-evoked serotonin ... rare case reports of an auditory side effect have been made, whereby patients perceive sounds about a semitone lower than ...
The local field potential, which includes both post-neuron-synaptic activity and internal neuron processing, better predicts ... Since scaling is just multiplication by a constant number, this means an event that evokes, say, twice the neural response as ... but evidence suggests a similar relationship at least for the auditory cortex and the primary visual cortex. Activation ... While fMRI stands out due to its potential to capture neural processes associated with health and disease, brainstimulation ...
Auditory evoked responses from Ear-EEG recordings. EMBC 2012. San Diego, Cal. doi:10.1109/EMBC.2012.6345999.. ... "A Study of Evoked Potentials From Ear-EEG". IEEE Transactions on Biomedical Engineering. 60 (10): 2824-2830. doi:10.1109/TBME. ... "Auditory evoked responses from Ear-EEG recordings".[3] Since then, it has grown to be an endeavor spread across multiple ... "Developing an online steady-state visual evoked potential-based brain-computer interface system using EarEEG". 2015 37th Annual ...
Although other, less common, partner-focused motives such as using to deception to evoke jealous reactions from their partner ... Animals for example may deceive predators or prey by visual, auditory or other means. ... other potential romantic mates).[28] Sociosexual orientation is concerned with how freely individuals partake in casual sex ... An exploration of the potential benefits of jealousy". Evolution and Human Behavior. 18 (6): 387-402. doi:10.1016/S1090-5138(97 ...
Evoked potentials and event-related potentials are obtained from an electroencephalogram by stimulus-locked averaging, i.e. ... Mäkinen V, Tiitinen H, May P (2005). "Auditory event-related responses are generated independently of ongoing brain activity". ... events that do not form evoked potentials/evoked fields, or induced activity. Spontaneous activity is usually considered to be ... Neurons generate action potentials resulting from changes in the electric membrane potential. Neurons can generate multiple ...
This link is important, because if an individual associates positive affect (elicited by pheromones[60]), with a potential mate ... Some believe that these messages have the power to alter moods, evoke distant memories, raise their spirits, and boost self- ... "A Naturalistic Analysis of Autobiographical Memories Triggered by Olfactory Visual and Auditory Stimuli". Chem. Senses. 29 (3 ... Because the olfactory signal terminates in or near the amygdala, odors are strongly linked to memories and can evoke emotions. ...
The evoked potentials and hemodynamic activity measured during encoding were found to exhibit reliable differences between ... Recency effects are seen more with auditory stimuli rather than verbal stimuli as auditory presentation seems to protect the ... This makes the auditory system pick up the differences in regular speaking and meaningful speech, when something significant is ... Gotoh, F (2012). "Affective valence of words impacts recall from auditory working memory". Journal of Cognitive Psychology. 24 ...
Evidence for auditory inputs is weak, although some neurons respond to auditory stimuli, indicating an indirect projection may ... In contrast to resting state and decision related activity, cues associated with drugs evoke robust OFC activity that ... The lateral OFC has been proposed to reflect potential choice value, enabling fictive(counterfactual) prediction errors to ... The evidence for responses to visual, gustatory, somatosensory, and olfactory stimuli is robust, but evidence or auditory ...
Comparison of auditory evoked potentials in heterosexual, homosexual, and bisexual males and females. JARO - Journal of the ... and sexual orientation should not be a focal point in potential relationships.. ...
... neural representations of visual stimuli in human auditory cortex correlate with illusory auditory perceptions". PLoS ONE. 8 (9 ... and potential solution - multisensory perception. The binding problem stemmed from unanswered questions about how mammals ( ... states that multisensory integration is more likely or stronger when the constituent unisensory stimuli evoke relatively weak ... Sadato et al. (2004) concluded, in line with Bernstein et al. (2002), that the primary auditory cortex (A1) was functionally ...
ATP release from supporting cells triggers action potentials in inner hair cells.[56] In the auditory system, spontaneous ... final fine-tuning of sensory-coding maps and circuit refinement begins to rely more and more on sensory-evoked activity as ... "Calcium action potentials in hair cells pattern auditory neuron activity before hearing onset". Nature Neuroscience. 13 (9): ... Meister, M; Wong, R.O.L; Baylor, D.A; Shatz, C.J (1991). "Synchronous bursts of action potentials in ganglion cells of the ...
auditory cue). Specific neural patterns were defined as architecturally separate circuits for one emotion vs. the other ... and is particularly active when a stimulus is novel or evokes uncertainty. The anterior insula may represent core affective ... Multiple studies have shown amygdala activation when perceiving a potential threat; various circuits allow the amygdala to use ...
Evoked potential. *Bereitschaftspotential. *P300. *Auditory evoked potential. *Somatosensory evoked potentials. *Visual evoked ... extracellular single-unit recording and recording of local field potentials, as well as some of the methods of calcium imaging ...
Potential applicants also use job interviews to assess their fit within an organization. This can determine if an applicant ... Vocal Attractiveness Just as physical attractiveness is a visual cue, vocal attractiveness is an auditory cue and can lead to ... The goal is to assess how the interviewee handles pressure or to purposely evoke emotional responses. This technique was also ... Despite the potential benefits to the group interview, there are problems with this interview format. In group interviews the ...
Brainstem auditory evoked potential. Evoked potentials. Negativity. Bereitschaftspotential. ELAN. N100. Visual N1. N170. N200. ... ERPLAB, for deriving measures from average event-related potentials;. *NBT, a toolbox for the computation and integration of ...
Steady state visually evoked potential. Auditory evoked potential[edit]. Auditory evoked potentials (AEP) can be used to trace ... There are three kinds of evoked potentials in widespread clinical use: auditory evoked potentials, usually recorded from the ... visual evoked potentials elicited by a flashing light or changing pattern on a monitor,[2] auditory evoked potentials by a ... An evoked potential or evoked response is an electrical potential recorded from the nervous system of a human or other animal ...
... also called brainstem auditory evoked responses (BAERs), are very small auditory evoked potentials in response to an auditory ... Long, KJ; Allen, N (October 1984). "Abnormal brain-stem auditory evoked potentials following Ondines curse". Archives of ... In human neuroanatomy, brainstem auditory evoked potentials (BAEPs), ... Although it is possible to obtain a BAEP to a pure tone stimulus in the hearing range, a more effective auditory stimulus ...
Previously, Chavez-Ibarra demonstrated that Auditory Evoked Potentials to words (AEP) has two main components in a second sweep ... Electrosleep, Hypnosis and Auditory Evoked Potentials to Words, A New Psychological Approach. ... Chavez-Ibarra G., Sanchez-Sinencio R., Medina-Jimenez J. (1971) Electrosleep, Hypnosis and Auditory Evoked Potentials to Words ...
11) Late Auditory Evoked Potentials: Changing the Things Which Are. 12) Endogenous Auditory Evoked Potentials: Attention Must ... The chapters on applications of auditory evoked potentials for neurotology, auditory neuropathy, and cochlear implants are ... Human Auditory Evoked Potentials. Terence Picton. Details:. 648 pages, Illustrated (B/W), Hardcover, 7 x 10" ISBN13:. 978-1- ... The book covers most of the aspects in which the study of auditory evoked potentials has contributed to expand our ...
Find treatment reviews for Brainstem Auditory Evoked Potentials (BAEP) from other patients. Learn from their experiences about ... What is Brainstem Auditory Evoked Potentials (BAEP)?. Category: Procedures false Brainstem auditory evoked potential (BAEP) ...
Pietrowsky, R., Dentler, M., Fehm, H.L. et al. Effects of calcitonin on human auditory and visual evoked brain potentials. ... Effects of calcitonin on human auditory and visual evoked brain potentials. *Reinhard Pietrowsky. 1. , ... Effects of calcitonin were assessed on brain potentials recorded from the human scalp which were evoked either by auditory ... sCT significantly increased latency of wave V of the brainstem auditory evoked potential (BAEP). Effects on BAEP wave V ...
ROCHA, Caroline Nunes et al. Brainstem auditory evoked potential with speech stimulus. Pró-Fono R. Atual. Cient. [online]. 2010 ... Palavras-chave : Electrophysiology; Evoked Potentials, Auditory, Brain Stem; Speech Perception. · resumo em Português · texto ... CONCLUSION: based on the gathered data it can be observed that this potential works as a new tool for understanding the ... AIM: to characterize the findings of the Auditory Brainstem Response (ABR) performed with speech stimuli in adults with typical ...
This PRO lesson describes hardware and software setup of the BSL PRO System to record and measure auditory evoked potentials. ... STIMULATION: Auditory, Electrical, Haptic, Olfactory, Visual+. Stimulation +. Auditory Stim Accessories. Olfactory (Scent) ... STIMULATION: Auditory, Electrical, Haptic, Olfactory, Visual+. Stimulation +. Auditory Stim Accessories. Olfactory (Scent) ... Ventricular Late Potentials (VLPs); ECG Measurement Tools; Automated Analysis Routines […] ...
This PRO lesson describes hardware and software setup of the BSL PRO System to record and measure auditory evoked potentials. ... STIMULATION: Auditory, Electrical, Haptic, Olfactory, Visual+. Stimulation +. Auditory Stim Accessories. Olfactory (Scent) ... STIMULATION: Auditory, Electrical, Haptic, Olfactory, Visual+. Stimulation +. Auditory Stim Accessories. Olfactory (Scent) ... To present an auditory stimulus to a human subject.. *To record Auditory Evoked Potentials. ...
... or evoked responses, measure the electrophysiologic responses of the nervous system to a variety of stimuli. In theory, almost ... Brainstem Auditory Evoked Potentials. The brainstem auditory evoked potential (BAEP), or brainstem auditory evoked response ( ... evoked potential (EP) studies-including visual evoked potential (VEP), brainstem auditory evoked potential (BAEP), and ... Comparisons of SEP, visual evoked potential (VEP), and brainstem auditory evoked potential (BAEP) have found that VEP testing ...
MMN and auditory evoked potentials provide a reliable assessment of the functional status of comatose patients. When present, ... Mismatch negativity and late auditory evoked potentials in comatose patients Clin Neurophysiol. 1999 Sep;110(9):1601-10. doi: ... Methods: MMN and auditory (early, middle-latency and late) evoked potentials were recorded in 52 normals and in 128 comatose ... Conclusion: MMN and auditory evoked potentials provide a reliable assessment of the functional status of comatose patients. ...
... auditory evoked potentials in children with phonological disorder.. AIM: to characterize the long latency auditory evoked ... Tonnquist-Uhlen I. Topography of auditory evoked long-latency potentials in children with severe language impairment: the P2 ... In the literature, the investigation of long-latency auditory evoked potentials (LLAEP) in children with phonological disorder ... Overview of auditory neurophysiology past, present, and future. In: Hall III JW. New handbook of auditory evoked responses; ...
SLOW AUDITORY EVOKED POTENTIALS: THE END OF MALINGERING IN AUDIOLOGY. R. BONIVER VERVIERS, BELGIUM Key words. Slow vertex ... The interest of slow vertex response audiometry (cortical evoked response audiometry), mainly in the diagnosis of ... Slow Auditory Evoked Potentials (1 Interligne - Free download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or read ... ABEP (Auditory Brainstem Evoked Potentials (BISHARA et al.)), etc…. In 1982, we published a preliminary study on the interest ...
Procedure: Auditory-evoked potentials cortical auditory-evoked potentials are performed to all included patients at inclusion, ... Cognitive Auditory Evoked Potential After Cardiac Arrest: Interest of Mismatch negativiTY (CAPACITY). The safety and scientific ... the optimal time of realization of the cortical auditory-evoked potential. *CPC score of 1 or 2 at ICU discharge [ Time Frame: ... Cortical auditory-evoked potential will be performed bedside in the ICU by qualified neurophysiologists. Results of cortical ...
Auditory Brain Stem Evoked Potentials in Acute Mountain Sickness SM. Morrissey SM. Morrissey ... Morrissey, AR Bradwell; Auditory Brain Stem Evoked Potentials in Acute Mountain Sickness. Clin Sci (Lond) 1 January 1990; 78 ( ...
Clinical Utility of Evoked Potentials Q&A What is the role of brainstem auditory evoked potential (BAEP) testing in the workup ... Brainstem auditory and visual evoked potentials in infants with myelomeningocele. Brain Dev. 1996 Mar-Apr. 18(2):99-104. [ ... Brainstem auditory evoked potentials in respiratory insufficiency following encephalitis. Int J Neurosci. 1996 Feb. 84(1-4):35- ... Kjaer M. Brain stem auditory and visual evoked potentials in multiple sclerosis. Acta Neurol Scand. 1980 Jul. 62(1):14-9. [ ...
A Study Using Brainstem Auditory Evoked Potentials. H. Vienny, P. A. Despland, J. Lütschg, T. Deonna, M. L. Dutoit-Marco, C. ... A Study Using Brainstem Auditory Evoked Potentials. H. Vienny, P. A. Despland, J. Lütschg, T. Deonna, M. L. Dutoit-Marco, C. ... Early Diagnosis and Evolution of Deafness in Childhood Bacterial Meningitis: A Study Using Brainstem Auditory Evoked Potentials ... Early Diagnosis and Evolution of Deafness in Childhood Bacterial Meningitis: A Study Using Brainstem Auditory Evoked Potentials ...
Relationship between Auditory Evoked Potentials and Circadian Preference in Patients with Major Depressive Episodes. Download ... Relationship Between Auditory Evoked Potentials and Circadian Preference in Patients With Major Depressive Episodes. Brain Sci. ... Relationship between Auditory Evoked Potentials and Circadian Preference in Patients with Major Depressive Episodes.. Brain Sci ... Relationship between Auditory Evoked Potentials and Circadian Preference in Patients with Major Depressive Episodes. Brain Sci ...
... Acta Otorrinolaringol Esp. 2006 ... Auditory Steady State Responses (ASSR) were obtained from all of them. Hearing aid fitting was established from the ...
This study investigated the effects of acoustic noise on the auditory nerve compound action potentials in response to electric ... Effects of acoustic noise on the auditory nerve compound action potentials evoked by el.... 20033246 - Electrically evoked ... Electrically evoked compound action potentials (ECAP) were recorded from the auditory nerve trunk in response to electric pulse ... This study investigated the effects of acoustic noise on the auditory nerve compound action potentials in response to electric ...
"Delayed Brainstem Auditory Evoked Potential Latencies in 14-Year-Old Children Exposed to Methylmercury." The Journal of ... Delayed brainstem auditory evoked potential latencies in 14-year-old children exposed to methylmercury. ... To determine possible exposure-associated delays in auditory brainstem evoked potential latencies as an objective measure of ... Latencies of brainstem evoked potential peaks I, III, and V at 20 and 40 Hz constituted the outcome variables. Mercury ...
auditory brainstem response. AEP. auditory evoked potentials. EFR. envelope following response. FFT. fast Fourier transform. r. ... 2005). Behavioral and auditory evoked potential audiograms of a false killer whale (Pseudorca crassidens). J. Acoust. Soc. Am. ... 2007). Hearing and auditory evoked potential methods applied to odontocete cetaceans. Aquat. Mamm. 33, 6-13. ... Audiogram of a formerly stranded long-finned pilot whale (Globicephala melas) measured using auditory evoked potentials ...
Auditory evoked potentials to arousing (awakenings or arousals) and non-arousing stimuli were subsequently computed. No between ... Auditory evoked potentials to arousing (awakenings or arousals) and non-arousing stimuli were subsequently computed. No between ... and tested whether the amplitude of auditory evoked potentials was predictive of arousing reactions during sleep. Participants ... and tested whether the amplitude of auditory evoked potentials was predictive of arousing reactions during sleep. Participants ...
Keywords: ketamine, event related potential, auditory evoked potential, gating, fear conditioning, schizophrenia, drug abuse ... Inhibition of auditory evoked potentials and prepulse inhibition of startle in DBA/2J and DBA/2Hsd inbred mouse substrains. ... Effects of nicotine vary across two auditory evoked potentials in the mouse. Biol Psychiatry. 2007;61(1):23-30. [PubMed] ... Chronic ketamine impairs fear conditioning and produces long-lasting reductions in auditory evoked potentials. L.C. Amann,1 T.B ...
Mantzaridis H, Kenny GNC: Auditory evoked potential index: A quantitative measure of changes in auditory evoked potentials ... Iselin-Chaves IA, Moalem HEE, Gan TJ, Ginsberg B, Glass PSA: Changes in the auditory evoked potentials and the Bispectral Index ... Rapid Extraction of Middle-latency Auditory-evoked Potentials You will receive an email whenever this article is corrected, ... Jensen EW, Lindholm P, Henneberg SW: Auto regressive modelling with exogenous input of auditory evoked potentials to produce an ...
... auditory evoked potentials are often employed. Auditory evoked potentials provide "objective" information regarding the ... HomeArticlesCan Cortical Auditory Evoked Potentials Demonstrate An Electrophysiological…. Can Cortical Auditory Evoked ... Specifically, auditory evoked potentials have been used to estimate behavioral audiometric thresholds; evaluate auditory ... More recently, we have been interested in whether this same RMF can be demonstrated with cortical auditory evoked potentials ( ...
Weiss, Stephan and Hoppe, Ulrich (1996) Recognition and reconstruction of late auditory evoked potentials using wavelet ... We introduce a recognition and reconstruction method for late auditory evoked potentials (AEPs) using wavelet analysis. The ... This method is more reliable than traditional means, and additionally offers the possibility of reconstructing potential AEPs ... engineering, wavelet analysis, auditory system, electroencephalography , Electrical engineering. Electronics Nuclear ...
Generators of the brainstem auditory evoked potential in cat. III: Identified cell populations. Hear Res. 1996 Apr; 93(1-2):52- ... Generators of the brainstem auditory evoked potential in cat. III: Identified cell populations. ... Generators of the brainstem auditory evoked potential in cat. III: Identified cell populations. ...
Mantzaridis H, Kenny GN: Auditory evoked potential index: A quantitative measure of changes in auditory evoked potentials ... Detection of Consciousness by Electroencephalogram and Auditory Evoked Potentials Gerhard Schneider, M.D.; Regina Hollweck, M. ... Gajraj RJ, Doi M, Mantzaridis H, Kenny GN: Comparison of bispectral EEG analysis and auditory evoked potentials for monitoring ... Detection of Consciousness by Electroencephalogram and Auditory Evoked Potentials You will receive an email whenever this ...
Long-latency auditory evoked potential (AEP) amplitudes were reduced during voluntary thumb movement. The cerebral component ... By contrast, the cerebral potential P200 and N100-P200 amplitudes were attenuated during the motor task compared to control. ... Long-latency auditory evoked potential (AEP) amplitudes were reduced during voluntary thumb movement. The cerebral component ... By contrast, the cerebral potential P200 and N100-P200 amplitudes were attenuated during the motor task compared to control. ...
The results of this study are consistent with theory that P1 arises from primary auditory cortex. Results further suggest ... P1 and N1 of the cortical auditory evoked potential (AEP) were studied with multiple electrodes in 10 normal subjects and 6 ... P1 and N1 of the cortical auditory evoked potential (AEP) were studied with multiple electrodes in 10 normal subjects and 6 ... Infarction of the superior temporal gyrus: a description of auditory evoked potential latency and amplitude topology.. @article ...
  • Although it is possible to obtain a BAEP to a pure tone stimulus in the hearing range, a more effective auditory stimulus contains a range of frequencies in the form of a short sharp click. (wikipedia.org)
  • What is Brainstem Auditory Evoked Potentials (BAEP)? (patientslikeme.com)
  • Brainstem auditory evoked potential (BAEP) tests evaluate how the the brainstem responds to specific sounds. (patientslikeme.com)
  • There are no evaluations for Brainstem Auditory Evoked Potentials (BAEP). (patientslikeme.com)
  • sCT significantly increased latency of wave V of the brainstem auditory evoked potential (BAEP). (springer.com)
  • It is noteworthy that these children may exhibit alterations in the values of latency and amplitude of the N2 component (3), as well as the latency values of Brainstem Auditory Evoked Potential (BAEP) and P300 - with a higher occurrence of alterations being reported for the P300. (scielo.br)
  • Fifty-one children with bacterial meningitis were studied prospectively using serial recordings of brainstem auditory evoked potential (BAEP) from the earliest phase of the disease, according to a standardized protocol. (aappublications.org)
  • However, observation of a child with clinically proven selective high-frequency postmeningitic deficit but without a hearing handicap, a disorder that was diagnosed early with BAEP (which tests only the high frequencies), is a warning that this method alone is insufficient and that clinical auditory surveillance and conventional audiometry remain necessary. (aappublications.org)
  • What is the role of brainstem auditory evoked potential (BAEP) testing in the workup of respiratory insufficiency after encephalitis? (medscape.com)
  • Long and Allen [3] reported the abnormal brainstem auditory evoked potentials (BAEP) in an alcoholic woman who recovered from acquired central hypoventilation syndrome . (wikipedia.org)
  • The Brainstem Auditory Evoked Potential (BAEP) assists in evaluating the auditory nerve pathways from the ears through the brainstem. (capitalhealth.org)
  • Methods A retrospective cross-sectional study was carried out with 11 patients submitted to the following procedures anamnesis, otorhinolaryngological evaluation, tonal and vocal audiometry , acoustic immittance and brainstem auditory evoked potential (BAEP) tests. (bvsalud.org)
  • One of these methods is brainstem auditory evoked potentials (BAEP) and interpretations of them (2,3). (semanticscholar.org)
  • A study was conducted in very-low-birth-weight (VLBW) neonates to correlate structural damage to the central nervous system due to intracranial hemorrhage (ICH) with electrophysiological function of the lower auditory system as measured by brainstem auditory evoked potentials (BAEP). (elsevier.com)
  • Surgery was carried out via a retrosigmoid approach with the brainstem auditory evoked potential (BAEP) guide. (mdpi.com)
  • To clarify the effect of vasogenic brain edema on the brainstem, the relationships between waveform changes in brainstem auditory evoked potentials (BAEP) and blood-brain barrier (BBB) disturbance following transient hindbrain ischemia were investigated. (fujita-hu.ac.jp)
  • In human neuroanatomy, brainstem auditory evoked potentials (BAEPs), also called brainstem auditory evoked responses (BAERs), are very small auditory evoked potentials in response to an auditory stimulus, which are recorded by electrodes placed on the scalp. (wikipedia.org)
  • BAEPs are highly sensitive to auditory conduction defects, but the findings are not pathologically specific. (oup.com)
  • Important factors that need to be considered for accurate interpretation of BAEPs include the patient's age, sex, and auditory acuity. (oup.com)
  • The diagnostic yield of BAEPs has been confirmed in patients with acoustic neuromas, MS, or intra-axial brain stem lesions involving the auditory pathways. (oup.com)
  • To more fully characterize brain-stem auditory evoked potentials (BAEPs) in non-human primates, BAEPs were recorded from chronically implanted epidural electrodes in 10 squirrel monkeys (Saimiri sciureus). (elsevier.com)
  • In summary, unanesthetized monkey BAEPs resemble human BAEPs in morphology, number of peaks, polarity, latency variability, inter-peak intervals, slow potentials superimposed on the high-frequency peaks, and variations in morphology, amplitude, and resolution of peaks as a function of recording site. (elsevier.com)
  • Auditory evoked potentials (AEPs), early (BAEPs) and long latency components (LLCs) in Parkinson's disease: a 12 month follow-up study. (elsevier.com)
  • BOTH EARLY AUDITORY evoked potentials (BAEPs) and middle-latency auditory evoked potentials (MLAEPs), were recorded in nine patients suffering from a quadrigeminal plate tumor. (elsevier.com)
  • To determine the neurophysiological effects of aminophylline on apnoea of prematurity, the brain stem auditory evoked potentials (BAEPs) of 30 apnoeic infants and 34 age matched controls were evaluated and compared. (elsevier.com)
  • CPC score will be evaluated at discharge of the ICU, of the hospital, at 3 months and 1 year by an independent evaluator, blinded of the results of the cortical auditory-evoked potentials. (clinicaltrials.gov)
  • The detection of cortical auditory evoked potentials (CAEP), which are part of the electroencephalogram (EEG) in reaction to acoustic stimuli, has important applications such as determining objective audiograms. (strath.ac.uk)
  • Can Cortical Auditory Evoked Potentials Demonstrate An Electrophysiological Release From Masking In Noise? (hearinghealthmatters.org)
  • More recently, we have been interested in whether this same RMF can be demonstrated with cortical auditory evoked potentials (CAEPs). (hearinghealthmatters.org)
  • We introduce a recognition and reconstruction method for late auditory evoked potentials (AEPs) using wavelet analysis. (strath.ac.uk)
  • This study investigated the effects of long-term unilateral and bilateral amplification on central auditory processing in elderly people with symmetrical hearing loss using late auditory evoked potentials. (uzh.ch)
  • The second section outlines specific auditory evoked potentials and the measurement of those responses. (pluralpublishing.com)
  • This [book] is a comprehensive overview of a wide range of auditory evoked responses for clinicians and researchers. (pluralpublishing.com)
  • Born J, Schwab R, Pietrowsky R, Pauschinger P, Fehm HL (1989) Glucocorticoid influences on the auditory brain-stem responses in man. (springer.com)
  • Evoked potentials (EPs), or evoked responses, measure the electrophysiologic responses of the nervous system to a variety of stimuli. (medscape.com)
  • Late evoked responses are generally used for studying higher cortical functions (eg, P300 in Alzheimer disease). (medscape.com)
  • Nevertheless, late evoked responses show promise and may make more inroads into clinical settings in the near future. (medscape.com)
  • Some centers have developed testing paradigms for olfactory and gustatory evoked responses as well. (medscape.com)
  • In 1982, we published a preliminary study on the interest in the study of cortical evoked responses audiometry (CERA) in the field of expertise. (scribd.com)
  • Auditory Steady State Responses (ASSR) were obtained from all of them. (nih.gov)
  • To further understand the possible causal link between brain responses, ISW and dream recall, we investigated the sleep microstructure of HR and LR, and tested whether the amplitude of auditory evoked potentials (AEPs) was predictive of arousing reactions during sleep. (frontiersin.org)
  • Androulidakis and Jones (2006) recorded N1 and P2 responses evoked to a 1000 Hz tone in quiet and in the presence of unmodulated and modulated noise. (hearinghealthmatters.org)
  • Usually the term "evoked potential" is reserved for responses involving either recording from, or stimulation of, central nervous system structures. (wikipedia.org)
  • Middle-latency Auditory Evoked Potentials (MLAEP) are bioelectric responses captured by electrodes placed at specific regions on the surface of the head, occurring between 10 and 80ms after the sound stimulus, and comprise a series of waves of negative voltage represented by the letter N and positive voltage represented by the letter P. In general, MLAEP responses are analysed in milliseconds for wave latencies and in microvolts for amplitude. (bvsalud.org)
  • To investigate neural plasticity resulting from early auditory deprivation and use of American Sign Language, we measured responses to visual stimuli in deaf signers, hearing signers, and hearing nonsigners using functional magnetic resonance imaging. (psu.edu)
  • We examined ''compensatory hypertrophy'' (changes in the responsivity/size of visual cortical areas) and ''cross-modal plasticity' ' (changes in auditory cortex responses to visual stimuli). (psu.edu)
  • We also measured the amplitude of responses within these areas, and within the auditory cortex, to a peripheral visual motion stimulus that was attended or ignored. (psu.edu)
  • In contrast, within the auditory cortex, motion stimuli evoked significant responses in deaf subjects, but not in hearing subjects, in a region of the right auditory cortex corresponding to Brodmann's areas 41, 42, and 22. (psu.edu)
  • Auditory brainstem evoked responses in the clinical evaluation and follow-up of insulin-dependent diabetic subjects. (semanticscholar.org)
  • Alternatively, auditory evoked potentials (AEPs) are responses that can be recorded from the brain following presentation of auditory stimuli that can be used to objectively assess the integrity of the auditory system from outer ear via the neuronal relays in the brain stem to the auditory cortex. (danishsound.org)
  • The aim of this project is to record a database of AEPs in response to different well-defined auditory stimuli, and test a set of algorithms to quantify the variation in the responses in order to obtain an index of the stability of AEPs. (danishsound.org)
  • Moreover, in hippocampal slices, JNJ-1930942 enhances neurotransmission at hippocampal dentate gyrus synapses and facilitates the induction of long-term potentiation of electrically evoked synaptic responses in the dentate gyrus. (aspetjournals.org)
  • The peak depicts positive potential difference those are labelled as 'P' where as the low points depicts negative potential difference those are labelled as 'N'. LLR responses are usually acquired by surface electrodes. (sphearclinic.com)
  • The objective was to determine frequency of sensorineural hearing loss (SNHL), identified by abnormal threshold in evoked potentials, absence of otoacoustic emissions and behavioral responses, auditory neuropathy (AN) (absence of evoked potentials, with preservation of otoacoustic emissions), and neurological comorbidity in infants with hyperbilirubinemia (HB) treated with exchange-transfusion (ET). (hindawi.com)
  • During sleep, between-group differences were also observed for auditory evoked potentials (AEPs) to the same stimuli, at the latency of the P3a in N2 and at later latencies during all sleep stages. (frontiersin.org)
  • This method is more reliable than traditional means, and additionally offers the possibility of reconstructing potential AEPs by performing an inverse transform on significant coefficients. (strath.ac.uk)
  • An alternative approach for assessment of electric brain activity is the observation of auditory evoked potentials (AEPs). (asahq.org)
  • This is the first study to investigate the effects of the non-selective muscarinic antagonist scopolamine, the muscarinic M1 antagonist biperiden and the cholinesterase inhibitor donepezil (also in combination with scopolamine and biperiden) on auditory evoked potentials (AEPs) and sensory gating. (maastrichtuniversity.nl)
  • The pattern of results is in accord with a slowing or inhibitory influence of calcitonin on auditory and visual sensory processing, thus paralleling findings concerning calcitonin effects on the perception of painful somatosensory stimuli. (springer.com)
  • although clinical use of the click stimulus for the evaluation of brainstem auditory function is widespread, and despite the fact that several researchers use such stimulus in studies involving human hearing, little is known about the auditory processing of complex stimuli such as speech. (scielo.br)
  • to characterize the findings of the Auditory Brainstem Response (ABR) performed with speech stimuli in adults with typical development. (scielo.br)
  • High dream recallers (HR) show a larger brain reactivity to auditory stimuli during wakefulness and sleep as compared to low dream recallers (LR) and also more intra-sleep wakefulness (ISW), but no other modification of the sleep macrostructure. (frontiersin.org)
  • In N2 sleep, auditory arousing stimuli elicited a larger parieto-occipital positivity and an increased late frontal negativity as compared to non-arousing stimuli. (frontiersin.org)
  • Notably, during wakefulness, in response to auditory novel stimuli, the attention-orienting brain response (P3a) and a late parietal component were found to be larger in HR than in LR. (frontiersin.org)
  • 4. An AEP needs auditory stimuli and, therefore, is applicable only to patients with preserved hearing. (asahq.org)
  • We manipulated stimulus frequency bands in auditory stimuli in order to investigate the nature of P50 in human auditory evoked potentials.Methods:Two paradigms have been used to obtain P50: one is a conditioning /testing paradigm in which paired of pure tone (1000Hz) are delivered, and the other was presented paired of clicks, both with an intensity of 60 dB sound pressure level above the auditory threshold. (who.int)
  • Sensory evoked potentials studies involve 3 tests that measure response to visual, auditory, and electrical stimuli. (nhrmc.org)
  • A healthcare professional places electrodes on your scalp and earlobes and delivers auditory stimuli, such as clicking noises and tones, to one ear. (nhrmc.org)
  • To assess hearing sensitivity of fish from the three test cohorts, the Auditory-Evoked Potentials (AEP) technique was used, which is a non-invasive electrophysiological measure of the synchronized brain response to auditory stimuli. (gov.scot)
  • The interest of slow vertex response audiometry (cortical evoked response audiometry), mainly in the diagnosis of pseudohypacousis is reported. (scribd.com)
  • Pure-tone audiometry was performed, and if no change was detected, Biologic's portable Evoked Potential System (EP) was used to measure auditory evoked potentials. (bvsalud.org)
  • Case-files of 15 known cases of vestibular schwannoma whose pure tone audiometry, auditory brainstem response (ABR), cVEMP and radiological investigation findings were available, were included in the study. (rborl.org.br)
  • It is divided into two sections - Part 1: Audiometry, using Auditory Evoked Potentials (AEP) to Determine Hearing Thresholds of a Number of Cohorts of Salmon and Part 2: The Impact of Pile-Driving Playback on the Behaviour and Physiology of Atlantic salmon (Salmo salar). (gov.scot)
  • visual evoked potentials, and somatosensory evoked potentials , which are elicited by electrical stimulation of peripheral nerve. (wikipedia.org)
  • Somatosensory Evoked Potentials (SSEPs) assess pathways from nerves in the arms or legs, through the spinal cord to the brainstem or cerebral cortex. (capitalhealth.org)
  • What is the role of somatosensory evoked potentials (SEPs) in determining the prognosis of postanoxic coma? (medscape.com)
  • Somatosensory evoked response (SSER) test. (nhrmc.org)
  • The visual evoked potential (VEP) tests the function of the visual pathway from the retina to the occipital cortex. (medscape.com)
  • Generators of visual evoked potentials investigated by dipole tracing in the human occipital cortex. (medscape.com)
  • Divergent response properties of layer-V neurons in rat primary auditory cortex. (biomedsearch.com)
  • That is, the newborn auditory cortex is sensitive to the temporal structure of the auditory input and shows an emerging tendency for functional asymmetry. (jneurosci.org)
  • The perception of suprasegmental modulations of language, like prosodic information carried by syllables, requires integration over longer timescales (∼150-300 ms) and is expected to predominantly recruit the right-hemispheric auditory cortex. (jneurosci.org)
  • Sensorineural hearing loss can happen when the sensitive inner ear (cochlea) has damage or a structural problem, though in rare cases it can be caused by problems with the auditory cortex, the part of the brain responsible for hearing. (kidshealth.org)
  • The CAEP test lets the audiologist see if the hearing pathways from the brainstem to the hearing part of the brain (auditory cortex) are working as they should. (kidshealth.org)
  • as for amplitude, it is the electrical activity at the cortex level generated as a result of auditory stimulation 1,2 . (bvsalud.org)
  • The clinical application of MLAEP is used in the evaluation of any abnormality that could impair the central auditory pathways, situated between the brain-colliculus lower trunk and the primary auditory cortex 7 . (bvsalud.org)
  • Gução et al, (2014) 8 confirmed this hypothesis and concluded, in their study, that there was a change in the functioning of the auditory information to the cortex level in two children with Asperger Syndrome. (bvsalud.org)
  • Visual Evoked Potentials (VEPs) evaluate the visual nervous system from the eyes to the occipital (visual) cortex of the brain. (capitalhealth.org)
  • Citation Query Probabilistic mapping and volume measurement of human primary auditory cortex. (psu.edu)
  • Probabilistic mapping and volume measurement of human primary auditory cortex. (psu.edu)
  • These results suggest that left auditory cortex WM anatomy, which likely reflects auditory processing efficiency, partly predicts individual differences in an aspect of language learning that relies on rapid temporal processing. (psu.edu)
  • Behavioral tasks involving auditory cues activate inhibitory neurons within auditory cortex, leading to a reduction in the amplitude of auditory evoked response potentials (ERPs). (jneurosci.org)
  • Here we set out to determine (1) whether the medial prefrontal cortex (mPFC) plays a role in task engagement and (2) how task engagement relates to the context-dependent processing of auditory cues in male and female mice performing a decision-making task that can be guided by either auditory or visual cues. (jneurosci.org)
  • We found that, in addition to auditory ERP suppression, task engagement is associated with increased mPFC activity and an increase in theta band (4-7 Hz) synchronization between the mPFC and auditory cortex. (jneurosci.org)
  • The test reflects the response of auditory cortex. (sphearclinic.com)
  • The purpose of this review is to describe the existing studies of electroencephalography (EEG) and evoked potentials (EPs) in Rett syndrome and discuss the open questions that must be addressed before the field can adopt these measures as surrogate endpoints in clinical trials. (frontiersin.org)
  • An evoked potential or evoked response is an electrical potential recorded from the nervous system of a human or other animal following presentation of a stimulus , as distinct from spontaneous potentials as detected by electroencephalography (EEG), electromyography (EMG), or other electrophysiologic recording method. (wikipedia.org)
  • Electroencephalography and evoked potentials. (medlineplus.gov)
  • Abboud S, Bar L, Rosenfeld M, Ring H, Glass I. Left-right asymmetry of visual evoked potentials in brain-damaged patients: a mathematical model and experimental results. (medscape.com)
  • Yuksel A, Sarslan O, Devranoglu K. Effect of valproate and carbamazepine on visual evoked potentials in epileptic children. (medscape.com)
  • Horn FK, Michelson G, Schnitzler E. Visual evoked potentials of the blue-sensitive pathway under cold provocation in normals and glaucomas. (medscape.com)
  • Parisi V, Miglior S, Manni G. Clinical ability of pattern electroretinograms and visual evoked potentials in detecting visual dysfunction in ocular hypertension and glaucoma. (medscape.com)
  • Szabela DA, Loba J, Palenga-Pydyn D. [The picture of visual evoked potentials in type 2 diabetes mellitus]. (medscape.com)
  • Evaluation of optic neuropathy in multiple sclerosis using low-contrast visual evoked potentials. (medscape.com)
  • Atilla H, Tekeli O, Ornek K. Pattern electroretinography and visual evoked potentials in optic nerve diseases. (medscape.com)
  • Yukagawa E, Urano T, Nakahara M. Pattern-reversal Visual Evoked Potentials in Patients with Human T-lymphotropic Virus Type 1 Uveitis. (medscape.com)
  • Visual evoked potentials in adrenoleukodystrophy: a trial with glycerol trioleate and Lorenzo oil. (medscape.com)
  • Due to their small amplitude, 500 or more repetitions of the auditory stimulus are required in order to average out the random background electrical activity. (wikipedia.org)
  • However, if a patient has only partial hearing capability, an AEP could be evoked by a click stimulus. (asahq.org)
  • In the range of 20-100 ms after the auditory stimulus, the midlatency components of the AEP follow. (asahq.org)
  • A test which measures how much auditory stimulus is needed to cause a brainstem response. (socalurologyinstitute.com)
  • An evoked potential is the electrical response of the brain to a sensory stimulus. (wikipedia.org)
  • More particularly, the cervical VEMP (cVEMP) presents a short latency and large amplitude myogenic potential, which presumably represents the saccule's response to sound when using an air-conducted stimulus [9-11]. (thefreelibrary.com)
  • These waves, labeled with Roman numerals in Jewett and Williston convention, occur in the first 10 milliseconds after onset of an auditory stimulus. (wikipedia.org)
  • This exam has shown to be the most appropriate method for the objective evaluation of auditory pathways integrity since MLAEP have higher neural origins 9 . (bvsalud.org)
  • In Brazil, studies have been conducted using MLAEP in clinical conditions such as auditory processing disorder central 10 , aphasia 11 , human immunode 﫿 ciency caused by HIV virus 12-13 Landau-Kleffner syndrome 14 , Multiple Sclerosis 15 , showing latency and amplitude changes in these conditions inherent to dysfunctions of central auditory pathways. (bvsalud.org)
  • The results of these examinations were correlated with impairments of the midbrain auditory pathways as shown by magnetic resonance imaging. (elsevier.com)
  • These results suggest that aminophylline may enhance conduction along central auditory pathways and stimulate the regulatory effect on the respiratory centre of the brain stem. (elsevier.com)
  • Thus, there is little evidence that ICH shortly after birth affected functioning of the auditory brainstem pathways in VLBW neonates at 36 weeks conceptional age. (elsevier.com)
  • Effects of calcitonin were assessed on brain potentials recorded from the human scalp which were evoked either by auditory clicks or visual checkerboard pattern-reversals. (springer.com)
  • Brain Stem Auditory Ev. (oup.com)
  • The Evoked Potential (EP) is a recording of electrical activity from the brain, spinal nerves, or sensory receptors in response to specific external stimulation, whether it be visual, auditory, or sensory stimulation. (capitalhealth.org)
  • Brainstem auditory evoked response (BAER) is a test to measure the brain wave activity that occurs in response to clicks or certain tones. (medlineplus.gov)
  • Sensory evoked potentials studies measure electrical activity in the brain in response to stimulation of sight, sound, or touch. (nhrmc.org)
  • An ischemic opening of the blood-brain barrier may deteriorate brain stem auditory evoked potentials following transient hindbrain ischemia in gerbils. (fujita-hu.ac.jp)
  • The auditory brainstem response (ABR) is an auditory evoked potential extracted from ongoing electrical activity in the brain and recorded via electrodes placed on the scalp. (wikipedia.org)
  • Sensory evoked potentials showed a bilateral increase in latency. (doctorsmedicalopinion.com)
  • Thus evoked compound motor action potentials (CMAP) or sensory nerve action potentials (SNAP) as used in nerve conduction studies (NCS) are generally not thought of as evoked potentials, though they do meet the above definition. (wikipedia.org)
  • Sensory evoked potentials have been widely used in clinical diagnostic medicine since the 1970s, and also in intraoperative neurophysiology monitoring (IONM), also known as surgical neurophysiology. (wikipedia.org)
  • By analogy with the steady-state response of a resonant circuit that follows the initial transient response he defined an idealized steady-state evoked potential (SSEP) as a form of response to repetitive sensory stimulation in which the constituent frequency components of the response remain constant with time in both amplitude and phase. (wikipedia.org)
  • As perturbations in auditory filtering appear to be a candidate trait marker of schizophrenia, there has been considerable interest in the development of translational rat models to elucidate the underlying neural and neurochemical mechanisms involved in sensory gating. (maastrichtuniversity.nl)
  • Changes in auditory processing and sensory gating induced by cholinergic drugs may serve as a translational model for aging instead of schizophrenia. (maastrichtuniversity.nl)
  • What is a sensory evoked potentials study? (nhrmc.org)
  • Why might I need a sensory evoked potentials study? (nhrmc.org)
  • There may be other reasons for your healthcare provider to recommend a sensory evoked potentials test. (nhrmc.org)
  • What are the risks of a sensory evoked potentials study? (nhrmc.org)
  • The sensory evoked potential studies are considered safe procedures. (nhrmc.org)
  • How do I get ready for a sensory evoked potentials study? (nhrmc.org)
  • children with phonological disorder present altered P300 suggesting involvement of the central auditory pathway, probably due to alterations in the auditory processing, presenting improvement in all components of LLAEP results after speech therapy. (scielo.br)
  • Auditory evoked potentials provide "objective" information regarding the structure and function of the auditory neurological pathway. (hearinghealthmatters.org)
  • The AEP consists of characteristic peaks and troughs that are related to specific neuroanatomical structures of the auditory pathway. (asahq.org)
  • other ancillary tests showed demyelinating damage to the auditory and visual pathway. (doctorsmedicalopinion.com)
  • MLAEP is used for more accurate diagnosis of changes that affect the auditory pathway, especially in paediatric populations. (bvsalud.org)
  • The auditory pathway is known as one of the most susceptible parts of the central nervous system to noxious agents. (hindawi.com)
  • Effects of acoustic noise on the auditory nerve compound action potentials evoked by electric pulse trains. (biomedsearch.com)
  • This study investigated the effects of acoustic noise on the auditory nerve compound action potentials in response to electric pulse trains. (biomedsearch.com)
  • Electrically evoked compound action potentials (ECAP) were recorded from the auditory nerve trunk in response to electric pulse trains both during and after the presentation of acoustic white noise. (biomedsearch.com)
  • The component structure of the N1 wave of the human auditory evoked potential. (elsevier.com)
  • Although there are many tests to demonstrate the existence of non-organic hearing loss (NOHL) none of them allows us to obtain the auditory threshold exactly. (scribd.com)
  • Both curcuminoids reduced auditory threshold shifts induced by cisplatin. (nih.gov)
  • citation needed] The ABR is used for newborn hearing screening, auditory threshold estimation, intraoperative monitoring, determining hearing loss type and degree, and auditory nerve and brainstem lesion detection, and in development of cochlear implants. (wikipedia.org)
  • The effect of oral prednisolone on visual evoked potential latencies in acute optic neuritis monitored in a prospective, randomized, controlled study. (medscape.com)
  • To determine possible exposure-associated delays in auditory brainstem evoked potential latencies as an objective measure of neurobehavioral toxicity in 14-year-old children with developmental exposure to methylmercury (MeHg) from seafood. (harvard.edu)
  • Latencies of brainstem evoked potential peaks I, III, and V at 20 and 40 Hz constituted the outcome variables. (harvard.edu)
  • 1 compared the prediction probability of two methods, i.e. , bispectral analysis of the electroencephalograph (BIS ® ) and peak amplitudes and latencies of middle-latency auditory-evoked potential (AEP). (asahq.org)
  • Prolonged brainstem auditory evoked potential latencies in tropical pancreatic diabetics with normal hearing. (semanticscholar.org)
  • BAER The hearing test known as the brainstem auditory evoked response (BAER) detects electrical activity in the animal's ear and. (vcahospitals.com)
  • These recordings are used in many different clinical situations--the identification of hearing impairment in newborn infants, the detection of tumors on the auditory nerve, the diagnosis of multiple sclerosis. (pluralpublishing.com)
  • this book makes an enjoyable reading for those that use some form of auditory evoked potentials for their clinical or research work and are interested in learning about other aspects of such a widespread subject involving neurologists, physiologists, psychologists, neuro-otologists and other specialists and researchers in the field. (pluralpublishing.com)
  • Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. (clinicaltrials.gov)
  • Objective:Clinical application of middle-latency auditor evoked potential (MLAEPs) has been increasing, highlighting the importance of understanding the nature of P50,a componentof middle-latency auditory evoked potential. (who.int)
  • A complete audiogram was collected using auditory evoked potential techniques that included measurements of nine frequencies from 4 to 100 kHz presented as sinusoidally amplitude-modulated tones. (biologists.org)
  • Gating of the P80 component of auditory evoked potentials was also significantly altered by treatment condition, as ketamine caused a significant decrease in S1 amplitude. (pubmedcentralcanada.ca)
  • Infarction of the superior temporal gyrus: a description of auditory evoked potential latency and amplitude topology. (semanticscholar.org)
  • To resolve these low-amplitude potentials against the background of ongoing EEG, ECG, EMG, and other biological signals and ambient noise, signal averaging is usually required. (wikipedia.org)
  • [7] Since a SSEP can be completely described in terms of the amplitude and phase of each frequency component it can be quantified more unequivocally than an averaged transient evoked potential. (wikipedia.org)
  • In fact, the amplitude of the potential increases proportionately with the mean level of tonic muscle activation [9]. (thefreelibrary.com)
  • Here, we compared the particle acceleration and pressure auditory thresholds of three species of fish with differing hearing specialisations, goldfish ( Carassius auratus , weberian ossicles), bigeye ( Pempheris adspersus , ligamentous hearing specialisation) and a third species with no swim bladder, the common triplefin ( Forstergyian lappillum ), using three different methods of determining particle acceleration. (biologists.org)
  • However, the evoked potentials test can sometimes confirm a diagnosis of multiple sclerosis. (nhrmc.org)
  • P1 and N1 of the cortical auditory evoked potential (AEP) were studied with multiple electrodes in 10 normal subjects and 6 patients with left middle cerebral artery infarction. (semanticscholar.org)
  • In 1967, Sohmer and Feinmesser were the first to publish ABRs recorded with surface electrodes in humans which showed that cochlear potentials could be obtained non-invasively. (wikipedia.org)
  • MMN and auditory (early, middle-latency and late) evoked potentials were recorded in 52 normals and in 128 comatose patients (comas due to neurosurgical and neurological problems). (nih.gov)
  • MMN and auditory evoked potentials provide a reliable assessment of the functional status of comatose patients. (nih.gov)
  • The presence of mismatch negativity during the cortical auditory-evoked potential could contribute to further progress in neurological prognostication of these patients. (clinicaltrials.gov)
  • Results of cortical auditory-evoked potential will remain blinded of bedside clinicians providing care for the patients. (clinicaltrials.gov)
  • This study aimed to test whether serotonergic neurotransmission, using the loudness dependence of auditory evoked potential (LDAEP), is associated with circadian preference in patients with major depressive disorder (MDD). (unboundmedicine.com)
  • These symptoms, which include auditory hallucinations, blunted affect and withdrawal, are all common to patients with schizophrenia. (pubmedcentralcanada.ca)
  • When patients cannot be assessed with behavioral techniques, auditory evoked potentials are often employed. (hearinghealthmatters.org)
  • Characterisation of urinary monocyte chemoattractant protein 1: Potential biomarker for patients with overactive bladder. (escholarship.org)
  • An auditory brainstem response (or ABR) test can tell how well the auditory nerve works. (kidshealth.org)
  • Visual evoked response (VER) test. (nhrmc.org)
  • Late Latency Response (LLR) is a component of auditory evoked potential response. (sphearclinic.com)
  • Late Latency Response test is used to diagnose certain conditions in auditory. (sphearclinic.com)
  • in intra-operative applications, selecting as an initial current level a current level at which a neural response is not expected to be evoked. (google.ca)
  • repeating the incrementing and repeating steps until a neural response has been evoked. (google.ca)
  • We assessed the effects of chronic administration of a subanesthetic dose of ketamine on contextual fear conditioning, detection of pitch deviants and auditory gating. (pubmedcentralcanada.ca)
  • to characterize the long latency auditory evoked potentials (LLAEP) results N1, P2, N2 and P300 of children with phonological disorder and to verify the improvement of such potentials with speech therapy. (scielo.br)
  • Evoked Potentials are helpful in evaluating a number of different neurological problems including spinal cord injuries, acoustic neuroma, and optic neuritis. (capitalhealth.org)
  • however, they do exhibit changes in behavioral tests, suggesting the existence of deficits in temporal or non-auditory processing such as attention (2). (scielo.br)
  • Clinicians typically evaluate auditory function with behavioral testing. (hearinghealthmatters.org)
  • https://jslhr.pubs.asha.org/article.aspx?articleid=1779117 The Late Auditory Evoked Potential Masking-Level Difference as a Function of Noise Level The purpose of this study was to determine whether the masking-level difference (MLD) obtained with the late (P2) auditory evoked potentials has characteristics similar to those reported for the behavioral MLD with respect to the effects of noise level. (asha.org)
  • The purpose of this study was to determine whether the masking-level difference (MLD) obtained with the late (P2) auditory evoked potentials has characteristics similar to those reported for the behavioral MLD with respect to the effects of noise level. (asha.org)
  • These results suggest that the late-potential MLD reflects characteristics similar to, but not identical with, those of the behavioral MLD. (asha.org)
  • based on the gathered data it can be observed that this potential works as a new tool for understanding the encoding of sound at the brainstem level. (scielo.br)
  • This report describes carefully controlled laboratory based experiments conducted to consider the potential impact of pile driving noise on Atlantic salmon behaviour and physiology. (gov.scot)
  • Harding, H., Bruintjes, R., Radford, A.N. and Simpson, S.D. (2016) Measurement of Hearing in the Atlantic salmon (Salmo salar) using Auditory Evoked Potentials, and effects of Pile Driving Playback on salmon Behaviour and Physiology. (gov.scot)
  • They reflect neuronal activity in the auditory nerve, cochlear nucleus, superior olive, and inferior colliculus of the brainstem. (wikipedia.org)
  • In case the nerve(s) of the patient have been damaged during trauma episode, the so called denervation potentials will be detectable on EMG 5 days after trauma. (vcahospitals.com)
  • Cervical vestibular evoked myogenic potentials (cVEMP) can assess the integrity of the inferior vestibular nerve thereby promising to be a useful tool in the audiological test battery to diagnose vestibular schwannoma. (rborl.org.br)
  • The development of this technique was based on the 8th cranial nerve compound action potential work done by Teas, Eldredge, and Davis in 1962. (wikipedia.org)
  • Therefore, the objective of this study was to characterize the results of LLAEP obtained in children with phonological disorder and to investigate the development of the potential after Speech therapy as well as to correlate the development of potentials and the history of otitis and severity of the phonological disorder. (scielo.br)
  • The auditory evoked potential technique has been used for the past 30 years to evaluate the hearing ability of fish. (biologists.org)
  • A zebrafish model was used to evaluate auditory effects. (nih.gov)
  • Auditory evoked potentials were studied on 27 male subjects to evaluate the effect of sojourn at high altitude (HA). (who.int)
  • Auditory evoked potentials were elicited by 500, 1000 and 2000 Hz pure tones at 55, 70 and 85 dB SPL presentation level delivered either to the left or right ear. (uzh.ch)
  • To assess the capacity of the presence of the mismatch negativity during the cortical auditory-evoked potential to predict awakening during the hospitalisation stay. (clinicaltrials.gov)
  • The design of the study will focus on the determination of the capacity of the presence of the mismatch negativity during the cortical auditory-evoked potential to predict awakening. (clinicaltrials.gov)
  • [email protected]#To investigate the law of auditory remodeling by studying the Cortical Auditory Evoked Potential in a group of post-lingually deaf adults in the early stage of the cochlear implant use. (bvsalud.org)