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auditory evoked responses

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https://www.readbyqxmd.com/read/29334277/validation-of-dpoae-screening-conducted-by-village-health-workers-in-a-rural-community-with-real-time-click-evoked-tele-auditory-brainstem-response
#1
Vidya Ramkumar, C S Vanaja, James W Hall, K Selvakumar, Roopa Nagarajan
OBJECTIVE: This study assessed the validity of DPOAE screening conducted by village health workers (VHWs) in a rural community. Real-time click evoked tele-auditory brainstem response (tele-ABR) was used as the gold standard to establish validity. DESIGN: A cross-sectional design was utilised to compare the results of screening by VHWs to those obtained via tele-ABR. Study samples: One hundred and nineteen subjects (0 to 5 years) were selected randomly from a sample of 2880 infants and young children who received DPOAE screening by VHWs...
January 15, 2018: International Journal of Audiology
https://www.readbyqxmd.com/read/29325145/anxiety-dependent-modulation-of-motor-responses-to-pain-expectancy
#2
Carlotta Fossataro, Giulia Bucchioni, Federico D'Agata, Valentina Bruno, Rosalba Morese, Pierre Krystkowiak, Francesca Garbarini
The relationship between pain expectancy and motor system plays a crucial role in the human defensive system. Here, we took advantage of the inhibitory modulation of the motor pathway to the muscle of the hand receiving painful stimuli, by recording motor-evoked potentials (MEPs) to Transcranial Magnetic Stimulation (TMS). We employed a classical conditioning paradigm in which neutral (visual and auditory) stimuli were conditioned by pairing either painful or not-painful stimuli (electric shocks) in separated groups...
January 8, 2018: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/29321651/auditory-neural-activity-in-congenitally-deaf-mice-induced-by-infrared-neural-stimulation
#3
Xiaodong Tan, Israt Jahan, Yingyue Xu, Stuart Stock, Changyow Claire Kwan, Carmen Soriano, Xianghui Xiao, Jaime García-Añoveros, Bernd Fritzsch, Claus-Peter Richter
To determine whether responses during infrared neural stimulation (INS) result from the direct interaction with spiral ganglion neurons (SGNs), we tested three genetically modified deaf mouse models: Atoh1-cre; Atoh1 f/f (Atoh1 conditional knockout, CKO), Atoh1-cre; Atoh1 f/kiNeurog1 (Neurog1 knockin, KI), and the Vglut3 knockout (Vglut3 -/-) mice. All animals were exposed to tone bursts and clicks up to 107 dB (re 20 µPa) and to INS, delivered with a 200 µm optical fiber. The wavelength (λ) was 1860 nm, the radiant energy (Q) 0-800 µJ/pulse, and the pulse width (PW) 100-500 µs...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29315177/forward-masking-of-the-speech-evoked-auditory-brainstem-response
#4
Sarah E Hodge, Denise C Menezes, Kevin D Brown, John H Grose
HYPOTHESIS: The hypothesis tested was that forward masking of the speech-evoked auditory brainstem response (sABR) increases peak latency as an inverse function of masker-signal interval (Δt), and that the overall persistence of forward masking is age dependent. BACKGROUND: Older listeners exhibit deficits in forward masking. If forward-masked sABRs provide an objective measure of the susceptibility of speech sounds to prior stimulation, then this provides a novel approach to examining the age dependence of temporal processing...
February 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29310507/inner-ear-test-battery-in-guinea-pig-models-a-review
#5
Yi-Ho Young
OBJECTIVE: This study reviewed the development of the inner ear test battery comprising auditory brainstem response (ABR), and caloric, ocular vestibular-evoked myogenic potential (oVEMP), and cervical vestibular-evoked myogenic potential (cVEMP) tests in guinea pig models at our laboratory over the last 20 years. Detailed description of the methodology for testing the small animals is also included. METHODS: Inner ear disorders, i.e. ototoxicity, noise exposure, or perilymph fistula were established in guinea pig models first...
January 8, 2018: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/29306985/children-with-autism-spectrum-disorder-have-unstable-neural-responses-to-sound
#6
Sebastian Otto-Meyer, Jennifer Krizman, Travis White-Schwoch, Nina Kraus
Autism spectrum disorder (ASD) is diverse, manifesting in a wide array of phenotypes. However, a consistent theme is reduced communicative and social abilities. Auditory processing deficits have been shown in individuals with ASD-these deficits may play a role in the communication difficulties ASD individuals experience. Specifically, children with ASD have delayed neural timing and poorer tracking of a changing pitch relative to their typically developing peers. Given that accurate processing of sound requires highly coordinated and consistent neural activity, we hypothesized that these auditory processing deficits stem from a failure to respond to sound in a consistent manner...
January 6, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29305917/motor-imagery-of-voluntary-muscle-relaxation-of-the-foot-induces-a-temporal-reduction-of-corticospinal-excitability-in-the-hand
#7
Kouki Kato, Kazuyuki Kanosue
The object of this study was to clarify how the motor imagery of foot muscle relaxation influences corticospinal excitability for the ipsilateral hand. Twelve participants volitionally relaxed their right foot from a dorsiflexed position (actual relaxation), or imaged the same movement (imagery relaxation) in response to an auditory cue. Transcranial magnetic stimulation (TMS) was delivered to the hand area of the left primary motor cortex at different time intervals after an auditory cue. Motor evoked potentials (MEPs) were recorded from the right extensor carpi radialis (ECR) and flexor carpi radialis (FCR)...
January 3, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29305208/vestibulo-cochlear-function-in-inflammatory-neuropathies
#8
Marisa Blanquet, Jens A Petersen, Antonella Palla, Dorothe Veraguth, Konrad P Weber, Dominik Straumann, Alexander A Tarnutzer, Hans H Jung
OBJECTIVE: We aimed to quantify peripheral-vestibular deficits that may contribute to imbalanced stance/gait in patients with inflammatory neuropathies. METHODS: Twenty-one patients (58 ± 15 y [mean age ± 1SD]; chronic-inflammatory-demyelinating-polyneuropathy = 10, Guillain-Barré Syndrome = 5, Anti-MAG peripheral neuropathy = 2, multifocal-motor-neuropathy = 4) were compared with 26 healthy controls. All subjects received video-head-impulse testing (vHIT), caloric irrigation and cervical/ocular vestibular-evoked myogenic-potentials (VEMPs)...
December 20, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29301390/acoustic-features-and-cortical-auditory-evoked-potentials-according-to-emotional-statues-of-u-a-i-vowels
#9
Chunhyeok Kim, Seungwan Lee, Inki Jin, Jinsook Kim
Background and Objectives: Although Ling 6 sounds are often used in the rehabilitation process, its acoustic features have not been fully analyzed and represented in cortical responses. Current study was aimed to analyze acoustic features according to gender and emotional statuses of core vowels of Ling 6 sounds, /u/, /a/, and /i/. Cortical auditory evoked potentials (CAEPs) were also observed in those vowels. Subjects and Methods: Vowel sounds /u/, /a/, and /i/ out of Ling 6 sounds representing low, middle and high frequencies were recorded from normal 20 young adults...
January 5, 2018: Journal of Audiology & Otology
https://www.readbyqxmd.com/read/29298327/gabaergic-mechanisms-involved-in-the-prepulse-inhibition-of-auditory-evoked-cortical-responses-in-humans
#10
Koji Inui, Nobuyuki Takeuchi, Shunsuke Sugiyama, Eishi Motomura, Makoto Nishihara
Despite their essential roles in signal processing in the brain, the functions of interneurons currently remain unclear in humans. We recently developed a method using the prepulse inhibition of sensory evoked cortical responses for functional measurements of interneurons. When a sensory feature is abruptly changed in a continuous sensory stimulus, change-related cortical responses are recorded using MEG. By inserting a weak change stimulus (prepulse) before the test change stimulus, it is possible to observe the inhibition of the test response...
2018: PloS One
https://www.readbyqxmd.com/read/29289064/self-masking-and-overlap-masking-from-reverberation-using-the-speech-evoked-auditory-brainstem-response
#11
Rida Al Osman, Hilmi R Dajani, Christian Giguère
This study introduces an improved method to investigate the effects of reverberation using the speech-evoked auditory brainstem response (ABR) that more realistically captures the influence of self- and overlap-masking induced by room reverberation. Speech-evoked ABR was measured under three acoustic scenarios: anechoic, mild reverberation with dominance of early reflections, and severe reverberation with dominance of late reverberation. Responses were significantly weaker and had longer latencies with severe reverberation relative to anechoic and mild reverberation...
December 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/29287891/characteristics-of-electrically-evoked-auditory-brainstem-responses-in-patients-with-cochlear-nerve-canal-stenosis-receiving-cochlear-implants
#12
Zhenxiao Wang, Yun Liu, Line Wang, Xixi Shen, Shuguang Han, Wei Wang, Fenqi Gao, Wenqi Liang, Kevin A Peng
OBJECTIVE: To explore the characteristics of the electrically evoked auditory brainstem responses (EABR) in children with cochlear nerve canal stenosis (CNCs) following cochlear implantation (CI), and the EABR thresholds in children with stenotic versus normal cochlear nerve canals. METHOD: Sixteen children with profound sensorineural hearing loss were included in this study: 8 with CNCs (CNCs group) and 8 with normal cochlear nerve canals (control group). All children underwent cochlear implantation with full insertion of all electrodes...
January 2018: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29287038/effects-of-amplification-on-neural-phase-locking-amplitude-and-latency-to-a-speech-syllable
#13
Kimberly A Jenkins, Calli Fodor, Alessandro Presacco, Samira Anderson
OBJECTIVE: Older adults often have trouble adjusting to hearing aids when they start wearing them for the first time. Probe microphone measurements verify appropriate levels of amplification up to the tympanic membrane. Little is known, however, about the effects of amplification on auditory-evoked responses to speech stimuli during initial hearing aid use. The present study assesses the effects of amplification on neural encoding of a speech signal in older adults using hearing aids for the first time...
December 27, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/29274947/electrically-evoked-auditory-steady-state-responses-as-neural-correlates-of-loudness-growth-in-cochlear-implant-users
#14
Maaike Van Eeckhoutte, Jan Wouters, Tom Francart
Loudness growth functions characterize how the loudness percept changes with current level between the threshold and most comfortable loudness level in cochlear implant users. Even though loudness growth functions are highly listener-dependent, currently default settings are used in clinical devices. This study investigated whether electrically-evoked auditory steady-state response amplitude growth functions correspond to behaviorally measured loudness growth functions. Seven cochlear implant listeners participated in two behavioral loudness growth tasks and an EEG recording session...
December 8, 2017: Hearing Research
https://www.readbyqxmd.com/read/29250857/theta-oscillations-reflect-conflict-processing-in-the-perception-of-the-mcgurk-illusion
#15
Luis Morís Fernández, Mireia Torralba Cuello, Salvador Soto-Faraco
The McGurk illusion is one of the most famous illustrations of cross-modal integration in human perception. It has been often used as a proxy of audiovisual integration and to infer the properties of the integration process in natural (congruent) audiovisual conditions. Nonetheless, a blatant difference between McGurk stimuli and natural, congruent, audiovisual speech is the conflict between the auditory and the visual information in the former. Here we hypothesized that McGurk stimuli (and any audiovisual incongruency) engage brain responses similar to those found in more general cases of perceptual conflict (e...
December 18, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29246784/micro-coil-induced-inhomogeneous-electric-field-produces-sound-driven-like-neural-responses-in-microcircuits-of-the-mouse-auditory-cortex-in-vivo
#16
Hisayuki Osanai, Shunsuke Minusa, Takashi Tateno
Magnetic stimulation is widely used in neuroscience research and clinical treatment. Despite recent progress in understanding the neural modulation mechanism of conventional magnetic stimulation methods, the physiological mechanism at the cortical microcircuit level is not well understood due to the poor stimulation focality and large electric artifact in the recording. To overcome these issues, we used a sub-millimeter-sized coil (micro-coil) to stimulate the mouse auditory cortex in vivo. To determine the mechanism, we conducted the first direct electrophysiological recording of micro-coil-driven neural responses at multiple sites on the horizontal surface and laminar areas of the auditory cortex...
December 12, 2017: Neuroscience
https://www.readbyqxmd.com/read/29243512/the-relationship-between-hospital-construction-and-high-risk-infant-auditory-function-at-nicu-discharge-a-retrospective-descriptive-cohort-study
#17
Valerie Willis
PURPOSE: To describe the difference in auditory function at neonatal intensive care unit (NICU) discharge between high-risk infant cases exposed to hospital construction during NICU stay and those not exposed. BACKGROUND: Noise produced by routine NICU caregiving exceeds recommended intensity. As California hospitals undergo construction to meet seismic safety regulations, vulnerable neonates are potentially exposed to even higher levels of noise. Ramifications are unknown...
January 1, 2017: HERD
https://www.readbyqxmd.com/read/29242137/sleep-deprivation-decreases-neuronal-excitability-and-responsiveness-in-rats-both-in-vivo-and-ex-vivo
#18
Sándor Borbély, Ildikó Világi, Zsófia Haraszti, Örs Szalontai, Tünde Hajnik, Attila Tóth, László Détári
Sleep deprivation has severe consequences for higher nervous functions. Its effects on neuronal excitability may be one of the most important factors underlying functional deterioration caused by sleep loss. In the present work, excitability changes were studied using two complementary in vivo and ex vivo models. Auditory evoked potentials were recorded from freely-moving animals in vivo. Amplitude of evoked responses showed a near-continuous decrease during deprivation. Prevention of sleep also reduced synaptic efficacy ex vivo, measured from brain slices derived from rats that underwent sleep deprivation...
December 11, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/29234358/hearing-loss-screening-tool-cobra-score-for-newborns-in-primary-care-setting
#19
Watcharapol Poonual, Niramon Navacharoen, Jaran Kangsanarak, Sirianong Namwongprom, Surasak Saokaew
Purpose: To develop and evaluate a simple screening tool to assess hearing loss in newborns. A derived score was compared with the standard clinical practice tool. Methods: This cohort study was designed to screen the hearing of newborns using transiently evoked otoacoustic emission and auditory brain stem response, and to determine the risk factors associated with hearing loss of newborns in 3 tertiary hospitals in Northern Thailand. Data were prospectively collected from November 1, 2010 to May 31, 2012...
November 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/29234064/homeostatic-plasticity-and-synaptic-scaling-in-the-adult-mouse-auditory-cortex
#20
Manuel Teichert, Lutz Liebmann, Christian A Hübner, Jürgen Bolz
It has been demonstrated that sensory deprivation results in homeostatic adjustments recovering neuronal activity of the deprived cortex. For example, deprived vision multiplicatively scales up mEPSC amplitudes in the primary visual cortex, commonly referred to as synaptic scaling. However, whether synaptic scaling also occurs in auditory cortex after auditory deprivation remains elusive. Using periodic intrinsic optical imaging in adult mice, we show that conductive hearing loss (CHL), initially led to a reduction of primary auditory cortex (A1) responsiveness to sounds...
December 12, 2017: Scientific Reports
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