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auditory brainstem response

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https://www.readbyqxmd.com/read/27905190/the-diagnostic-accuracy-of-non-imaging-screening-protocols-for-vestibular-schwannoma-in-patients-with-asymmetrical-hearing-loss-and-or-unilateral-audiovestibular-dysfunction-a-diagnostic-review-and-meta-analysis
#1
M Hentschel, M Scholte, S Steens, H Kunst, M Rovers
BACKGROUND: Currently, all patients presenting with asymmetrical sensorineural hearing loss and/or unilateral audiovestibular dysfunction (i.e. tinnitus, dizziness) undergo MRI, leading to a substantial amount of MRIs with negative findings as the incidence of vestibular schwannoma (VS) in this screening population varies between 1% and 4.7% (i.e. more than 95% of MRIs are negative for VS). OBJECTIVE OF REVIEW: The aim was to assess the diagnostic accuracy of different non-imaging screening protocols that can be used prior to MRI to select patients at high risk of VS...
November 5, 2016: Clinical Otolaryngology
https://www.readbyqxmd.com/read/27904821/auditory-brainstem-response-and-late-latency-response-in-individuals-with-tinnitus-having-normal-hearing
#2
Sreeraj Konadath, Puttabasappa Manjula
Tinnitus is a commonly encountered complaint in routine audiology practice. The pathophysiology and exact generation site of tinnitus is not precisely established. Auditory brainstem response (ABR) and late latency response (LLR) findings in individuals with tinnitus show mixed results in the literature. Majority of studies have focused on individuals having tinnitus with peripheral hearing loss. The present study explores ABR and LLR characteristics among tinnitus patients with normal audiometric presentation; with no direct indication of any cochlear lesion...
November 2016: Intractable & Rare Diseases Research
https://www.readbyqxmd.com/read/27900753/-issues-related-to-screening-and-caring-for-newborns-with-hearing-impairments
#3
Mei-Show Liou, Ying Tsao
The critical period for auditory development in humans begins at around the 20th gestational week and continues until 3 years of age. Both genetic and environmental factors are known to cause impaired hearing. Without early identification and intervention, hearing-impaired children face a high risk of experiencing significant difficulties with speech and language development, social behavior, and emotional functioning. Two types of commonly used hearing screening technologies include transient evoked otoacoustic emission (TEOAE) and automated auditory brainstem response (aABR)...
December 2016: Hu Li za Zhi the Journal of Nursing
https://www.readbyqxmd.com/read/27897127/effects-of-noise-exposure-on-the-auditory-function-of-ovariectomized-rats-with-estrogen-deficiency
#4
Xujun Hu, Ying Wang, Chi Chuen Lau
OBJECTIVE: The benefits of estrogen for the auditory function of women depend on a number of factors. In this study, we aimed to examine the impact of noise trauma on the auditory function of ovariectomized rats with estrogen deficiency. MATERIALS AND METHODS: Twenty-eight young, female Sprague-Dawley rats were assigned to three groups (OVX+N, OVX-N, Sham+N). Rats in the OVX+N group and the OVX-N group underwent bilateral ovariectomy (OVX); the OVX+N group alone was also exposed to white noise (N) of 115 dB SPL for 8 hours a day over 14 days...
November 28, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27897125/a-comparison-of-thresholds-of-auditory-steady-state-response-and-auditory-brainstem-response-in-healthy-term-babies
#5
Onur Çelik, Görkem Eskiizmir, Uzdan Uz
OBJECTIVE: The goal of this study was to assess the effectiveness of auditory steady-state response (ASSR), determine the cut-off values for each frequency, and detect the best correlated frequencies when compared with the auditory brainstem response (ABR) thresholds in term babies under the age of 12 months. MATERIALS AND METHODS: In total, 88 term babies with a mean age of 2.98 (1-11) months (174 ears) underwent ASSR and ABR tests. The ASSR thresholds for the frequencies of 500, 1000, 2000, and 4000 Hz were compared with the hearing level of the ABR thresholds...
November 28, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27896671/a-comparison-of-the-brainstem-auditory-evoked-response-in-healthy-ears-of-unilaterally-deaf-dogs-and-bilaterally-hearing-dogs
#6
M Plonek, J Nicpoń, K Kubiak, M Wrzosek
AIMS: Auditory plasticity in response to unilateral deafness has been reported in various animal species. Subcortical changes occurring in unilaterally deaf young dogs using the brainstem auditory evoked response have not been evaluated yet. The aim of this study was to assess the brainstem auditory evoked response findings in dogs with unilateral hearing loss, and compare them with recordings obtained from healthy dogs. METHODS: Brainstem auditory evoked responses (amplitudes and latencies of waves I, II, III, V, the V/I wave amplitude ratio, wave I-V, I-III and III-V interpeak intervals) were studied retrospectively in forty-six privately owned dogs, which were either unilaterally deaf or had bilateral hearing...
November 29, 2016: Veterinary Research Communications
https://www.readbyqxmd.com/read/27896486/neural-correlates-of-the-binaural-masking-level-difference-in-human-frequency-following-responses
#7
Christopher G Clinard, Sarah L Hodgson, Mary Ellen Scherer
The binaural masking level difference (BMLD) is an auditory phenomenon where binaural tone-in-noise detection is improved when the phase of either signal or noise is inverted in one of the ears (SπNo or SoNπ, respectively), relative to detection when signal and noise are in identical phase at each ear (SoNo). Processing related to BMLDs and interaural time differences has been confirmed in the auditory brainstem of non-human mammals; in the human auditory brainstem, phase-locked neural responses elicited by BMLD stimuli have not been systematically examined across signal-to-noise ratio...
November 28, 2016: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/27893606/cochlear-brainstem-and-psychophysical-responses-show-spectrotemporal-tradeoff-in-human-auditory-processing
#8
Gavin M Bidelman, Shaum P Bhagat
Auditory filter theory posits a tradeoff in time-frequency analysis: high temporal precision is achievable only at the expense of poorer frequency resolution and vice versa. Here, we examined the hierarchy of brain mechanisms of these spectrotemporal tradeoffs through a series of physiological and behavioral measures aimed to tap temporal and spectral acuity at different levels of the auditory neuroaxis (cochlea→brainstem→percept). Cochlear and behavioral frequency selectivity was measured by stimulus-frequency otoacoustic emissions (SFOAE) and psychophysical tuning curves; temporal acuity was measured physiologically and behaviorally by paired click recovery of auditory brainstem responses (ABRs) and gap detection thresholds (GDTs), respectively...
January 1, 2017: Neuroreport
https://www.readbyqxmd.com/read/27891689/deficit-in-acoustic-signal-in-noise-detection-in-glycine-receptor-%C3%AE-3-subunit-knockout-mice
#9
Konstantin Tziridis, Stefanie Buerbank, Volker Eulenburg, Julia Dlugaiczyk, Holger Schulze
Hearing is an essential sense for communication in animals and humans. Normal function of the cochlea of higher vertebrates relies on a fine-tuned interplay of afferent and efferent innervation of both inner and outer hair cells. Efferent inhibition is controlled via olivocochlear feedback loops, mediated mainly by acetylcholine, γ-aminobutyric acid (GABA) and glycine, and is one of the first sites affected by synapto- and neuropathy in the development of hearing loss. While the functions of acetylcholine, GABA, and other inhibitory transmitters within these feedback loops are at least partially understood, especially the function of glycine still remains elusive...
November 27, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27891665/spectral-summation-and-facilitation-in-on-and-off-responses-for-optimized-representation-of-communication-calls-in-mouse-inferior-colliculus
#10
Alexander G Akimov, Marina A Egorova, Günter Ehret
Selectivity for processing of species-specific vocalizations and communication sounds has often been associated with the auditory cortex. The midbrain inferior colliculus, however, is the first center in the auditory pathways of mammals integrating acoustic information processed in separate nuclei and channels in the brainstem and, therefore, could significantly contribute to enhance the perception of species' communication sounds. Here, we used natural wriggling calls of mouse pups, which communicate need for maternal care to adult females, and further 15 synthesized sounds to test the hypothesis that neurons in the central nucleus of the inferior colliculus of adult females optimize their response rates for reproduction of the three main harmonics (formants) of wriggling calls...
November 27, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27885514/speech-evoked-auditory-brainstem-response-and-gap-detection-threshold-in-middle-aged-individual
#11
Himanshu Kumar Sanju, Vaishnavi Bohra, Sujeet Kumar Sinha
This study aimed at characterizing the gap detection threshold (GDT) and speech evoked ABR (SABR) in younger and middle-aged individuals. Two groups of subjects were participated in the study which includes 15 young adults in the age range of 15-25 years and 15 middle-aged individuals in the age range of 40-60 years. SABR with stimulus/da/of 40 ms and GDT were investigated on both groups. For SABR, Mann-Whitney U test revealed that ageing has significantly adverse effect on the encoding of F1 and F2 at brainstem level...
November 24, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27884735/elderly-listeners-with-low-intelligibility-scores-under-reverberation-show-degraded-subcortical-representation-of-reverberant-speech
#12
H Fujihira, K Shiraishi, G B Remijn
In order to elucidate why many elderly listeners have difficulty understanding speech under reverberation, we investigated the relationship between word intelligibility and auditory brainstem responses (ABRs) in 28 elderly listeners. We hypothesized that the elderly listeners with low word intelligibility scores under reverberation would show degraded subcortical encoding information of reverberant speech as expressed in their ABRs towards a reverberant /da/ syllable. The participants were divided into two groups (top and bottom performance groups) according to their word intelligibility scores for anechoic and reverberant words, and ABR characteristics between groups were compared...
November 21, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27879227/correlation-between-cvemp-and-abr-for-the-evaluation-of-vestibular-migraine
#13
Mehmet Sürmeli, Reyhan Sürmeli, İldem Deveci, Serap Önder, Ayşe Destina Yalçın, Çağatay Oysu
OBJECTIVE: Vestibular migraine (VM) is a clinical condition characterized by temporal overlap between vestibular symptoms and migraine. In this study, we aimed to determine the changes in vestibular myogenic potential (cVEMP) and auditory brainstem response (ABR) in patients with VM and migraine. MATERIALS AND METHODS: A total of 86 participants with no hearing loss or additional disease between the ages of 18 and 45 were enrolled in three different groups: group 1, VM; group 2, migraine without aura; and group 3, healthy controls...
November 23, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27879226/speech-evoked-auditory-brainstem-response-in-individuals-with-diabetes-mellitus-type-2
#14
Himanshu Kumar Sanju, Akhil Mohanan, Prawin Kumar
OBJECTIVE: Diabetes is the most common glucose level dependent metabolic disorder and studies have shown that hearing impairment can be a long-term subclinical complication. Studies to investigate auditory system involvement in diabetes has focused majorly on the auditory brainstem response (ABR), otoacoustic emission, and basic audiological measures. Hence in the current study, we used speech-evoked ABR (S-ABR) as a tool to see the effect of diabetes on both a transient and sustained response of the auditory brainstem to a conventionally used consonant-vowel (CV) stimuli /da/...
November 23, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27865708/effects-of-exposure-to-2100mhz-gsm-like-radiofrequency-electromagnetic-field-on-auditory-system-of-rats
#15
Metin Çeliker, Abdulkadir Özgür, Levent Tümkaya, Suat Terzi, Mustafa Yılmaz, Yıldıray Kalkan, Ender Erdoğan
INTRODUCTION: The use of mobile phones has become widespread in recent years. Although beneficial from the communication viewpoint, the electromagnetic fields (EMF) generated by mobile phones may cause unwanted biological changes in the human body. OBJECTIVE: In this study, we aimed to evaluate the effects of 2100MHz Global System for Mobile communication (GSM-like) electromagnetic field (EMF), generated by an EMF generator, on the auditory system of rats by using electrophysiological, histopathologic and immunohistochemical methods...
November 5, 2016: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/27865214/-auditory-neuropathy-clinical-evaluation-and-diagnostic-approach
#16
Guilherme Machado Carvalho, Beatriz Prista Leão, Priscila Zonzini Ramos, Alexandre Caixeta Guimarães, Arthur Menino Castilho, Edi Lúcia Sartorato
INTRODUCTION: Auditory neuropathy is a condition in which there is a change in the neuronal transmission of the auditory stimuli. Our objective was to describe the patients' series within the clinical spectrum of auditory neuropathy. MATERIAL AND METHODS: We designed a transversal, retrospective study, with a description of a consecutive case series. Auditory neuropathy was defined by the presence of acoustic otoemissions plus absent/abnormal auditory brainstem responses with cochlear microphonism...
June 2016: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/27863646/regenerative-efficacy-of-mesenchymal-stromal-cells-from-human-placenta-in-sensorineural-hearing-loss
#17
Kicheol Kil, Mi Young Choi, Ji Sun Kong, Woo Jin Kim, Kyoung Ho Park
INTRODUCTION: Hearing loss is a common chronic disorder characterized by decline of auditory function. The global population have suffered from deafness and the transplantation of stem cells is regarded as a therapeutic strategy for this disease. METHODS: We collected placenta from a total of 13 samples of full term pregnant women and isolated MSCs derived from human placenta and transplanted MSCs on deaf animal model. The normal group and the sensorineural hearing loss (SNHL) group and the experimental (transplanted MSCs) group were compared and estimated hearing level using auditory brainstem response (ABR) recordings and the otoacoustic emission (OAE) test...
December 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27863636/the-effect-of-propofol-infusion-with-topical-epinephrine-on-cochlear-blood-flow-and-hearing-an-experimental-study
#18
Chul Ho Jang, Yong Beom Cho, Jun Sik Lee, Geun Hyung Kim, Won-Kyo Jung, Sok Cheon Pak
BACKGROUND AND OBJECTIVE: Propofol is the most commonly used intravenous (IV) anesthetic agent and is associated with hypotension upon induction of anesthesia. Intravenous propofol infusion has several properties that may be beneficial to patients undergoing middle ear surgery. Topical application of concentrated epinephrine is a valuable tool for achieving hemostasis in the middle ear and during mastoid surgery. The purpose of the present study was to determine the effects of propofol infusion with topical epinephrine on cochlear blood flow (CBF) and hearing in rats...
December 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27863628/an-effective-compromise-between-cost-and-referral-rate-a-sequential-hearing-screening-protocol-using-teoaes-and-aabrs-for-healthy-newborns
#19
Yingying Shang, Wenyang Hao, Zhiqiang Gao, Chunxiao Xu, Ying Ru, Daofeng Ni
OBJECTIVE: This study evaluated the efficacy of a sequential hearing screening protocol using transient evoked otoacoustic emission (TEOAE) and automated auditory brainstem response (AABR) tests in healthy newborns. DESIGN: A TEOAE screening was performed during the first 48-72 h of life. If the infants failed, an AABR test was performed at the same time, and they were referred for a TEOAE rescreening at six weeks old. The results of screening Protocol 1 (only TEOAE) were compared with those of screening Protocol 2 (sequential TEOAE + AABR screenings for the first screening and TEOAE for the rescreening)...
December 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27862478/reductions-in-cortical-alpha-activity-enhancements-in-neural-responses-and-impaired-gap-detection-caused-by-sodium-salicylate-in-awake-guinea-pigs
#20
Joel I Berger, Ben Coomber, Mark N Wallace, Alan R Palmer
Tinnitus chronically affects between 10-15% of the population but despite its prevalence, the underlying mechanisms are still not properly understood. One experimental model involves administration of high doses of sodium salicylate, as this is known to reliably induce tinnitus in both humans and animals. Guinea pigs were implanted with chronic electrocorticography (ECoG) electrode arrays, with silver ball electrodes placed on the dura over left and right auditory cortex. Two more electrodes were positioned over the cerebellum to monitor auditory brainstem responses (ABRs)...
November 12, 2016: European Journal of Neuroscience
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