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auditory evoked responses

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https://www.readbyqxmd.com/read/28077712/changes-in-properties-of-auditory-nerve-synapses-following-conductive-hearing-loss
#1
Xiaowen Zhuang, Wei Sun, Matthew A Xu-Friedman
: Auditory activity plays an important role in the development of the auditory system. Decreased activity can result from conductive hearing loss (CHL) associated with otitis media, which may lead to long-term perceptual deficits. The effects of CHL have been mainly studied at later stages of the auditory pathway, but early stages remain less examined. However, changes in early stages could be important because they would affect how information about sounds is conveyed to higher-order areas for further processing and localization...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28069762/orbitofrontal-cortex-neurons-respond-to-sound-and-activate-primary-auditory-cortex-neurons
#2
Daniel E Winkowski, Daniel A Nagode, Kevin J Donaldson, Pingbo Yin, Shihab A Shamma, Jonathan B Fritz, Patrick O Kanold
Sensory environments change over a wide dynamic range and sensory processing can change rapidly to facilitate stable perception. While rapid changes may occur throughout the sensory processing pathway, cortical changes are believed to profoundly influence perception. Prior stimulation studies showed that orbitofrontal cortex (OFC) can modify receptive fields and sensory coding in A1, but the engagement of OFC during listening and the pathways mediating OFC influences on A1 are unknown. We show in mice that OFC neurons respond to sounds consistent with a role of OFC in audition...
January 8, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28056042/effect-of-the-level-of-anesthesia-on-the-auditory-brainstem-response-in-the-emei-music-frog-babina-daunchina
#3
Jianguo Cui, Bicheng Zhu, Guangzhan Fang, Ed Smith, Steven E Brauth, Yezhong Tang
Anesthesia is known to affect the auditory brainstem response (ABR) in mice, rats, birds and lizards. The present study investigated how the level of anesthesia affects ABR recordings in an amphibian species, Babina daunchina. To do this, we compared ABRs evoked by tone pip stimuli recorded from 35 frogs when Tricaine methane sulphonate (MS-222) anesthetic immersion times varied from 0, 5 and 10 minutes after anesthesia induction at sound frequencies between 0.5 and 6 kHz. ABR thresholds increased significantly with immersion time across the 0...
2017: PloS One
https://www.readbyqxmd.com/read/28054149/a-model-of-electrically-stimulated-auditory-nerve-fiber-responses-with-peripheral-and-central-sites-of-spike-generation
#4
Suyash Narendra Joshi, Torsten Dau, Bastian Epp
A computational model of cat auditory nerve fiber (ANF) responses to electrical stimulation is presented. The model assumes that (1) there exist at least two sites of spike generation along the ANF and (2) both an anodic (positive) and a cathodic (negative) charge in isolation can evoke a spike. A single ANF is modeled as a network of two exponential integrate-and-fire point-neuron models, referred to as peripheral and central axons of the ANF. The peripheral axon is excited by the cathodic charge, inhibited by the anodic charge, and exhibits longer spike latencies than the central axon; the central axon is excited by the anodic charge, inhibited by the cathodic charge, and exhibits shorter spike latencies than the peripheral axon...
January 4, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28050358/to-study-brain-stem-auditory-evoked-potential-in-patients-with-type-2-diabetes-mellitus-a-cross-sectional-comparative-study
#5
Mishra Indira Sushil, J N Muneshwar, Sayeeda Afroz
INTRODUCTION: Neuropathy is one of the commonest complications of Diabetes Mellitus (DM). Apart from having peripheral and autonomic neuropathy patients with type 2 DM may also suffer from sensory neural hearing loss, which is more severe at higher frequencies. However, few studies have done detailed evaluation of sensory pathway in these patients. In this study brain stem auditory evoked potential is used to detect the acoustic and central neuropathy in a group of patients with type 2 DM with controlled and uncontrolled blood sugar...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28046062/compensating-level-dependent-frequency-representation-in-auditory-cortex-by-synaptic-integration-of-corticocortical-input
#6
Max F K Happel, Frank W Ohl
Robust perception of auditory objects over a large range of sound intensities is a fundamental feature of the auditory system. However, firing characteristics of single neurons across the entire auditory system, like the frequency tuning, can change significantly with stimulus intensity. Physiological correlates of level-constancy of auditory representations hence should be manifested on the level of larger neuronal assemblies or population patterns. In this study we have investigated how information of frequency and sound level is integrated on the circuit-level in the primary auditory cortex (AI) of the Mongolian gerbil...
2017: PloS One
https://www.readbyqxmd.com/read/28043881/simultaneously-evoked-auditory-potentials-seap-a-new-method-for-concurrent-measurement-of-cortical-and-subcortical-auditory-evoked-activity
#7
Christopher Slugocki, Daniel Bosnyak, Laurel J Trainor
Recent electrophysiological work has evinced a capacity for plasticity in subcortical auditory nuclei in human listeners. Similar plastic effects have been measured in cortically-generated auditory potentials but it is unclear how the two interact. Here we present Simultaneously-Evoked Auditory Potentials (SEAP), a method designed to concurrently elicit electrophysiological brain potentials from inferior colliculus, thalamus, and primary and secondary auditory cortices. Twenty-six normal-hearing adult subjects (mean 19...
December 30, 2016: Hearing Research
https://www.readbyqxmd.com/read/28030933/event-related-potentials-erp-and-sgip1-gene-polymorphisms-in-alcoholics-relation-to-family-history-of-alcoholism-and-drug-usage
#8
Roman Chwedorowicz, Grzegorz Raszewski, Lucyna Kapka-Skrzypczak, Krzysztof Sawicki, Tadeusz Studziński
OBJECTIVE: The electrophysiological characteristics may serve as valuable biomarkers for the genetic vulnerability underlying alcoholism. The purpose of this study was to evaluate the potential associations between single nucleotide polymorphisms (SNPs) located in the SGIP1 gene and the theta ERP quantitative traits. METHOD: The theta band (4-7 Hz) visual ERP occurring in the P300 response in the resting EEG were examined to explore the electrophysiological effects of alcohol on the brain in five regions: frontal, central, parietal, temporal and occipital in patients with alcohol addiction...
23, 2016: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/28024827/evaluation-of-peripheral-auditory-pathways-and-brainstem-in-obstructive-sleep-apnea
#9
Erika Matsumura, Carla Gentile Matas, Fernanda Cristina Leite Magliaro, Raquel Meirelles Pedreño, Geraldo Lorenzi-Filho, Seisse Gabriela Gandolfi Sanches, Renata Mota Mamede Carvallo
INTRODUCTION: Obstructive sleep apnea causes changes in normal sleep architecture, fragmenting it chronically with intermittent hypoxia, leading to serious health consequences in the long term. It is believed that the occurrence of respiratory events during sleep, such as apnea and hypopnea, can impair the transmission of nerve impulses along the auditory pathway that are highly dependent on the supply of oxygen. However, this association is not well established in the literature. OBJECTIVE: To compare the evaluation of peripheral auditory pathway and brainstem among individuals with and without obstructive sleep apnea...
November 25, 2016: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28011120/effect-of-hearing-aids-use-on-speech-stimulus-decoding-through-speech-evoked-abr
#10
Renata Aparecida Leite, Fernanda Cristina Leite Magliaro, Jeziela Cristina Raimundo, Mara Gândara, Sergio Garbi, Ricardo Ferreira Bento, Carla Gentile Matas
INTRODUCTION: The electrophysiological responses obtained with the complex auditory brainstem response (cABR) provide objective measures of subcortical processing of speech and other complex stimuli. The cABR has also been used to verify the plasticity in the auditory pathway in the subcortical regions. OBJECTIVE: To compare the results of cABR obtained in children using hearing aids before and after 9 months of adaptation, as well as to compare the results of these children with those obtained in children with normal hearing...
December 8, 2016: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28007497/a-novel-method-for-extraction-of-neural-response-from-single-channel-cochlear-implant-auditory-evoked-potentials
#11
Daniel Sinkiewicz, Lendra Friesen, Behnaz Ghoraani
Cortical auditory evoked potentials (CAEP) are used to evaluate cochlear implant (CI) patient auditory pathways, but the CI device produces an electrical artifact, which obscures the relevant information in the neural response. Currently there are multiple methods, which attempt to recover the neural response from the contaminated CAEP, but there is no gold standard, which can quantitatively confirm the effectiveness of these methods. To address this crucial shortcoming, we develop a wavelet-based method to quantify the amount of artifact energy in the neural response...
December 19, 2016: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28007044/neurophysiological-aspects-of-brainstem-processing-of-speech-stimuli-in-audiometric-normal-geriatric-population
#12
M S Ansari, R Rangasayee, M A H Ansari
OBJECTIVE: Poor auditory speech perception in geriatrics is attributable to neural de-synchronisation due to structural and degenerative changes of ageing auditory pathways. The speech-evoked auditory brainstem response may be useful for detecting alterations that cause loss of speech discrimination. Therefore, this study aimed to compare the speech-evoked auditory brainstem response in adult and geriatric populations with normal hearing. METHODS: The auditory brainstem responses to click sounds and to a 40 ms speech sound (the Hindi phoneme |da|) were compared in 25 young adults and 25 geriatric people with normal hearing...
December 23, 2016: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28001276/effects-of-prematurity-on-language-acquisition-and-auditory-maturation-a-systematic-review
#13
Inaê Costa Rechia, Luciéle Dias Oliveira, Anelise Henrich Crestani, Eliara Pinto Vieira Biaggio, Ana Paula Ramos de Souza
Purpose: To verify which damages prematurity causes to hearing and language. Research strategies: We used the decriptors language/linguagem, hearing/audição, prematurity/prematuridade in databases LILACS, MEDLINE, Cochrane Library and Scielo. Selection criteria: randomized controlled trials, non-randomized intervention studies and descriptive studies (cross-sectional, cohort, case-control projects). Data analysis: The articles were assessed independently by two authors according to the selection criteria...
November 2016: CoDAS
https://www.readbyqxmd.com/read/28000259/demonstrating-test-retest-reliability-of-electrophysiological-measures-for-healthy-adults-in-a-multisite-study-of-biomarkers-of-antidepressant-treatment-response
#14
Craig E Tenke, Jürgen Kayser, Pia Pechtel, Christian A Webb, Daniel G Dillon, Franziska Goer, Laura Murray, Patricia Deldin, Benji T Kurian, Patrick J McGrath, Ramin Parsey, Madhukar Trivedi, Maurizio Fava, Myrna M Weissman, Melvin McInnis, Karen Abraham, Jorge E Alvarenga, Daniel M Alschuler, Crystal Cooper, Diego A Pizzagalli, Gerard E Bruder
Growing evidence suggests that loudness dependency of auditory evoked potentials (LDAEP) and resting EEG alpha and theta may be biological markers for predicting response to antidepressants. In spite of this promise, little is known about the joint reliability of these markers, and thus their clinical applicability. New standardized procedures were developed to improve the compatibility of data acquired with different EEG platforms, and used to examine test-retest reliability for the three electrophysiological measures selected for a multisite project-Establishing Moderators and Biosignatures of Antidepressant Response for Clinical Care (EMBARC)...
January 2017: Psychophysiology
https://www.readbyqxmd.com/read/27995385/effect-of-shorter-pulse-duration-in-cochlear-neural-activation-with-an-810-nm-near-infrared-laser
#15
Jingxuan Wang, Lan Tian, Jianren Lu, Ming Xia, Ying Wei
Optical neural stimulation in the cochlea has been presented as an alternative technique to the electrical stimulation due to its potential in spatially selectivity enhancement. So far, few studies have selected the near-infrared (NIR) laser in cochlear neural stimulation and limited optical parameter space has been examined. This paper focused on investigating the optical parameter effect on NIR stimulation of auditory neurons, especially under shorter pulse durations. The spiral ganglion neurons in the cochlea of deafened guinea pigs were stimulated with a pulsed 810-nm NIR laser in vivo...
December 20, 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/27993097/evaluation-of-the-occurrence-of-canine-congenital-sensorineural-deafness-in-puppies-of-predisposed-dog-breeds-using-the-brainstem-auditory-evoked-response
#16
Marta Płonek, Elżbieta Giza, Artur Niedźwiedź, Krzysztof Kubiak, Józef Nicpoń, Marcin Wrzosek
Canine congenital sensorineural deafness (CCSD) affects predisposed breeds of dogs and is primarily caused by an atrophy of the stria vascularis of the organ of Corti. The analysis of the brainstem auditory evoked response (BAER) is a reliable method for the evaluation of hearing in animals as it allows an accurate detection of unilateral or bilateral deafness. The occurrence of unilateral and bilateral deafness using the BAER was determined in a representative group of dogs in Poland, including Bull Terriers (n = 117), Australian Cattle Dogs (n = 62), English Setters (n = 32) and the Dogo Argentino (n = 32)...
December 2016: Acta Veterinaria Hungarica
https://www.readbyqxmd.com/read/27989950/plastic-changes-along-auditory-pathway-during-salicylate-induced-ototoxicity-hyperactivity-and-cf-shifts
#17
Chen Jiang, Bin Luo, Senthilvelan Manohar, Guang-Di Chen, Richard Salvi
High dose of salicylate, the active ingredient in aspirin, has long been known to induce transient hearing loss, tinnitus and hyperacusis making it a powerful experimental tool. These salicylate-induced perceptual disturbances are associated with a massive reduction in the neural output of the cochlea. Paradoxically, the diminished neural output of the cochlea is accompanied by a dramatic increase in sound-evoked activity in the auditory cortex (AC) and several other parts of the central nervous system. Exactly where the increase in neural activity begins and builds up along the central auditory pathway are not fully understood...
October 27, 2016: Hearing Research
https://www.readbyqxmd.com/read/27987044/short-wavelength-infrared-laser-activates-the-auditory-neurons-comparing-the-effect-of-980-vs-810%C3%A2-nm-wavelength
#18
Lan Tian, Jingxuan Wang, Ying Wei, Jianren Lu, Anting Xu, Ming Xia
Research on auditory neural triggering by optical stimulus has been developed as an emerging technique to elicit the auditory neural response, which may provide an alternative method to the cochlear implants. However, most previous studies have been focused on using longer-wavelength near-infrared (>1800 nm) laser. The effect comparison of different laser wavelengths in short-wavelength infrared (SWIR) range on the auditory neural stimulation has not been previously explored. In this study, the pulsed 980- and 810-nm SWIR lasers were applied as optical stimuli to irradiate the auditory neurons in the cochlea of five deafened guinea pigs and the neural response under the two laser wavelengths was compared by recording the evoked optical auditory brainstem responses (OABRs)...
December 16, 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/27982254/electrophysiological-characterization-of-hearing-in-individuals-with-down-syndrome
#19
Hellen Medeiros Kazan, Alessandra Giannella Samelli, Ivone Ferreira Neves-Lobo, Fernanda Cristina Leite Magliaro, Suelly Cecília Olivan Limongi, Carla Gentile Matas
Introduction: Few studies have performed Brainstem (BAEP) and P300 Auditory Evoked Potentials simultaneously to assess central auditory pathways in normal hearing individuals with Down syndrome (DS), mainly because of the difficulty in applying these procedures to this population. Previous studies have suggested that individuals with DS might present different patterns of response compared with those of individuals with typical development; nevertheless, the identification of these potentials would be crucial for the establishment of an accurate audiological diagnosis...
November 2016: CoDAS
https://www.readbyqxmd.com/read/27978890/-speech-evoked-auditory-brainstem-response-and-cognitive-disorders
#20
M Zhou, N Y Wang
Speech evoked auditory brainstem response(s-ABR)is evoked by compound syllable, and those stimulus are similar to the daily language which convey both semantic information and non-semantic information. Speech coding program can take place at brainstem. As a new method, s-ABR may reveal the mystery of speech coding program. Many tests have proved that s-ABR is somehow related to cognitive ability. We mainly illustrated the possibility of grading the cognitive ability using s-ABR, the abnormal test result from those cognitive disorders, and the family factors that contribute to cognitive disorder...
December 7, 2016: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
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