scholarly journals Vestibular Hearing and Neural Synchronization

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Seyede Faranak Emami ◽  
Ahmad Daneshi
Keyword(s):  
Low Frequency ◽  
Pure Tone Audiometry ◽  
Auditory Brainstem ◽  
Nerve Fibers ◽  
Auditory Brainstem Responses ◽  
Vestibular Evoked Myogenic Potentials ◽  
Fast Wave ◽  
Response Component ◽  
Neural Synchronization ◽  
Brainstem Response

Objectives. Vestibular hearing as an auditory sensitivity of the saccule in the human ear is revealed by cervical vestibular evoked myogenic potentials (cVEMPs). The range of the vestibular hearing lies in the low frequency. Also, the amplitude of an auditory brainstem response component depends on the amount of synchronized neural activity, and the auditory nerve fibers' responses have the best synchronization with the low frequency. Thus, the aim of this study was to investigate correlation between vestibular hearing using cVEMPs and neural synchronization via slow wave Auditory Brainstem Responses (sABR). Study Design. This case-control survey was consisted of twenty-two dizzy patients, compared to twenty healthy controls. Methods. Intervention comprised of Pure Tone Audiometry (PTA), Impedance acoustic metry (IA), Videonystagmography (VNG), fast wave ABR (fABR), sABR, and cVEMPs. Results. The affected ears of the dizzy patients had the abnormal findings of cVEMPs (insecure vestibular hearing) and the abnormal findings of sABR (decreased neural synchronization). Comparison of the cVEMPs at affected ears versus unaffected ears and the normal persons revealed significant differences (P<0.05). Conclusion. Safe vestibular hearing was effective in the improvement of the neural synchronization.

Bone conduction auditory brainstem responses in infants

2004 ◽  
Vol 118 (2) ◽  
pp. 117-122 ◽  
Author(s):  
P. E. Campbell ◽  
C. M. Harris ◽  
S. Hendricks ◽  
T. Sirimanna
Keyword(s):  
Hearing Loss ◽  
Dynamic Range ◽  
Bone Conduction ◽  
Low Frequency ◽  
Paediatric Population ◽  
Auditory Brainstem ◽  
Sensorineural Hearing ◽  
Auditory Brainstem Responses ◽  
Brainstem Response ◽  
Narrow Dynamic Range

The contribution of air conduction auditory brainstem response (AC-ABR) testing in the paediatric population is widely accepted in clinical audiology. However, this does not allow for differentiation between conductive and sensorineural hearing loss. The purpose ofthis paper is to review the role of bone conduction auditory brainstem responses (BC-ABR). It is argued that despite such technical difficulties as a narrow dynamic range, masking dilemmas, stimulus artifact and low frequency underestimation of hearing loss, considerable evidence exists to suggest that BC-ABR testing provides an important contribution in the accurate assessmentof hearing loss in infants. Modification of the BC-ABR protocol is discussed and the technical difficulties that may arise are addressed, permitting BC-ABR to be used as a tool in the differential diagnosis between conductive and sensorineural hearing. Two relevant case studies are presented to highlight the growing importance of appropriate management in early identification of hearing loss. It can be concluded that BC-ABR should be adopted as a routine clinical diagnostic tool.

scholarly journals Vestibular nerve compression: role of auditory brainstem response and cervical vestibular evoked myogenic potentials

2017 ◽  
Vol 3 (3) ◽  
pp. 749
Author(s):  
Deepa A. Valame ◽  
Geeta B. Gore
Keyword(s):  
Low Frequency ◽  
Auditory Brainstem ◽  
Cochlear Nerve ◽  
Vestibular Evoked Myogenic Potentials ◽  
Anterior Inferior Cerebellar Artery ◽  
Mri Findings ◽  
Study Approach ◽  
Compression Syndrome ◽  
Brainstem Response

<p>The objective of the study was to evaluate the role of ABR and cVEMP in the diagnosis of vestibular compression syndrome (VCS) and to study the association of test results with the MRI findings. This is a case-report of four patients with VCS using case-study approach.<strong><em> </em></strong>Four patients with varying degrees of indentation of vestibulo-cochlear nerve by the anterior inferior cerebellar artery (AICA) loops were studied. Episodic rotatory vertigo was reported by three cases and two cases complained of tinnitus but the characteristic low-frequency ‘type-writer’ type of tinnitus was seen in only one. All cases showed evidence of retrocochlear pathology on ABR although two had normal peripheral hearing status. The cVEMP abnormalities noted were absence of cVEMP and reduced amplitude of cVEMP as compared to instrument-specific age-matched norms; only one case with no indentation of vestibulo-cochlear nerve had normal cVEMP tracings. Presence of AICA loops on the MRI by itself need not necessarily indicate vestibular compression syndrome. However when MRI excludes any other pathology in cases with symptoms such as unilateral sensorineural hearing loss, tinnitus, vertigo; vestibular compression could be the etiology. The likelihood of abnormal test findings is greater when the loop causes indentation of the nerve. </p>

scholarly journals The Correlation Between Click-Evoked Auditory Brainstem Responses and Future Behavioral Thresholds Determined Using Universal Newborn Hearing Screening

2021 ◽  
Vol 58 ◽  
pp. 004695802110490
Author(s):  
Ting-Yu Cheng ◽  
Ching-Fang Tsai ◽  
Chih-Wei Luan
Keyword(s):  
Pure Tone ◽  
Pure Tone Audiometry ◽  
Correlation Method ◽  
Auditory Brainstem ◽  
Auditory Brainstem Responses ◽  
Health Administration ◽  
Universal Newborn Hearing Screening ◽  
Before And After ◽  
Newborn Hearing ◽  
Brainstem Response

This retrospective study was undertaken to assess the correlation between click-evoked auditory brainstem responses and behavioral hearing tests. We recruited a total of 16646 infants born in Ditmanson Medical Foundation Chia-Yi Christian Hospital, Taiwan, from 2012 to 2018 for such assessment purpose. Their data including the click-evoked auditory brainstem response (ABR), referral, and diagnostic follow-up were collected. Spearman correlation method was employed to assess the relationship between ABR and pure-tone threshold. The correlation between the click-evoked ABR that met the National Health Administration standards and the click-evoked ABR derived from estimates before and after the 2.5 years of age effectively predicted the toddlers’ pure-tone audiometry (PTA) thresholds at 2–4 kHz.

Vestibular-evoked myogenic potentials and caloric stimulation in infants with congenital cytomegalovirus infection

2007 ◽  
Vol 122 (6) ◽  
pp. 574-579 ◽  
Author(s):  
O Zagólski
Keyword(s):  
Cytomegalovirus Infection ◽  
Clinical Symptoms ◽  
Auditory Brainstem ◽  
Auditory Brainstem Responses ◽  
Vestibular Evoked Myogenic Potentials ◽  
Cochlear Function ◽  
Congenital Cytomegalovirus Infection ◽  
Congenital Cytomegalovirus ◽  
Caloric Stimulation ◽  
Brainstem Response

AbstractBackground:The influence of congenital cytomegalovirus infection on cochlear function has been well recognised; however, its impact on the vestibular system in infants has not been examined. The purpose of the present study was to evaluate vestibular function in a group of infants, using caloric stimulation tests and vestibular-evoked myogenic potential measurements.Materials and methods:Vestibular-evoked myogenic potentials and auditory brainstem responses were recorded and caloric stimulation was performed in 66 infants aged three months, comprising 40 healthy controls and 26 infants with congenital cytomegalovirus infection.Results:No reaction to caloric stimulation was elicited from 16 examined ears, no vestibular-evoked myogenic potentials were recorded from 12 ears, and profound sensorineural hearing loss was diagnosed in eight ears. Pathological results were observed predominantly in infants with symptoms of intrauterine congenital cytomegalovirus infection present at birth.Conclusions:In infants with clinical symptoms of congenital CMV infection present at birth, abnormal vestibular test results occurred more frequently than abnormal auditory brainstem response results. Vestibular organs should be routinely examined in individuals with congenital cytomegalovirus infection.

The Effect of Kalman-Weighted Averaging and Artifact Rejection on Residual Noise During Auditory Brainstem Response Testing

2019 ◽  
Vol 28 (1) ◽  
pp. 114-124
Author(s):  
Linda W. Norrix ◽  
Julie Thein ◽  
David Velenovsky
Keyword(s):  
Repeated Measures ◽  
Auditory Brainstem ◽  
Weighted Averaging ◽  
Auditory Brainstem Responses ◽  
Residual Noise ◽  
Electrophysiological Recordings ◽  
Artifact Rejection ◽  
Brainstem Response ◽  
Active Motor ◽  
Averaging Time

Purpose Low residual noise (RN) levels are critically important when obtaining electrophysiological recordings of threshold auditory brainstem responses. In this study, we examine the effectiveness and efficiency of Kalman-weighted averaging (KWA) implemented on the Vivosonic Integrity System and artifact rejection (AR) implemented on the Intelligent Hearing Systems SmartEP system for obtaining low RN levels. Method Sixteen adults participated. Electrophysiological measures were obtained using simultaneous recordings by the Vivosonic and Intelligent Hearing Systems for subjects in 2 relaxed conditions and 4 active motor conditions. Three averaging times were used for the relaxed states (1, 1.5, and 3 min) and for the active states (1.5, 3, and 6 min). Repeated-measures analyses of variance were used to examine RN levels as a function of noise reduction strategy (i.e., KWA, AR) and averaging time. Results Lower RN levels were obtained using KWA than AR in both the relaxed and active motor states. Thus, KWA was more effective than was AR under the conditions examined in this study. Using KWA, approximately 3 min of averaging was needed in the relaxed condition to obtain an average RN level of 0.025 μV. In contrast, in the active motor conditions, approximately 6 min of averaging was required using KWA. Mean RN levels of 0.025 μV were not attained using AR. Conclusions When patients are not physiologically quiet, low RN levels are more likely to be obtained and more efficiently obtained using KWA than AR. However, even when using KWA, in active motor states, 6 min of averaging or more may be required to obtain threshold responses. Averaging time needed and whether a low RN level can be attained will depend on the level of motor activity exhibited by the patient.

Comparisons of Auditory Brainstem Responses Between a Laboratory and Simulated Home Environment

2020 ◽  
Vol 63 (11) ◽  
pp. 3877-3892
Author(s):  
Ashley Parker ◽  
Candace Slack ◽  
Erika Skoe
Keyword(s):  
Home Environment ◽  
Signal To Noise Ratio ◽  
Auditory Brainstem ◽  
Auditory Brainstem Responses ◽  
Single Family ◽  
Adult Participants ◽  
Simulated Home Environment ◽  
Brainstem Response ◽  
Research Populations ◽  
Response Consistency

Purpose Miniaturization of digital technologies has created new opportunities for remote health care and neuroscientific fieldwork. The current study assesses comparisons between in-home auditory brainstem response (ABR) recordings and recordings obtained in a traditional lab setting. Method Click-evoked and speech-evoked ABRs were recorded in 12 normal-hearing, young adult participants over three test sessions in (a) a shielded sound booth within a research lab, (b) a simulated home environment, and (c) the research lab once more. The same single-family house was used for all home testing. Results Analyses of ABR latencies, a common clinical metric, showed high repeatability between the home and lab environments across both the click-evoked and speech-evoked ABRs. Like ABR latencies, response consistency and signal-to-noise ratio (SNR) were robust both in the lab and in the home and did not show significant differences between locations, although variability between the home and lab was higher than latencies, with two participants influencing this lower repeatability between locations. Response consistency and SNR also patterned together, with a trend for higher SNRs to pair with more consistent responses in both the home and lab environments. Conclusions Our findings demonstrate the feasibility of obtaining high-quality ABR recordings within a simulated home environment that closely approximate those recorded in a more traditional recording environment. This line of work may open doors to greater accessibility to underserved clinical and research populations.

scholarly journals Auditory Brainstem Responses to Successive Sounds: Effects of Gap Duration and Depth

2021 ◽  
Vol 11 (1) ◽  
pp. 38-46
Author(s):  
Fan-Yin Cheng ◽  
Craig A. Champlin
Keyword(s):  
Background Noise ◽  
Tone Burst ◽  
Auditory Brainstem ◽  
Auditory Brainstem Responses ◽  
Physical Parameters ◽  
Temporal Acuity ◽  
Harmonic Complex ◽  
Rapid Changes ◽  
Brainstem Response ◽  
Physiological Correlate

Temporal acuity is the ability to differentiate between sounds based on fluctuations in the waveform envelope. The proximity of successive sounds and background noise diminishes the ability to track rapid changes between consecutive sounds. We determined whether a physiological correlate of temporal acuity is also affected by these factors. We recorded the auditory brainstem response (ABR) from human listeners using a harmonic complex (S1) followed by a brief tone burst (S2) with the latter serving as the evoking signal. The duration and depth of the silent gap between S1 and S2 were manipulated, and the peak latency and amplitude of wave V were measured. The latency of the responses decreased significantly as the duration or depth of the gap increased. The amplitude of the responses was not affected by the duration or depth of the gap. These findings suggest that changing the physical parameters of the gap affects the auditory system’s ability to encode successive sounds.

Auditory Brainstem Responses to Middle- and Low-Frequency Tone Pips

1984 ◽  
Vol 23 (1) ◽  
pp. 75-84 ◽  
Author(s):  
M. Maurizi ◽  
G. Paludetti ◽  
F. Ottaviani ◽  
M. Rosignoli
Keyword(s):  
Low Frequency ◽  
Auditory Brainstem ◽  
Auditory Brainstem Responses ◽  
Frequency Tone

Hearing recovery from deafness caused by bromate intoxication

2018 ◽  
Vol 132 (11) ◽  
pp. 1039-1041 ◽  
Author(s):  
J Suzuki ◽  
Y Takanashi ◽  
A Koyama ◽  
Y Katori
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
Pure Tone ◽  
Pure Tone Audiometry ◽  
Auditory Brainstem ◽  
Sensorineural Hearing ◽  
Auditory Brainstem Responses ◽  
Common Symptom ◽  
Hearing Recovery ◽  
Continuous Haemodiafiltration

AbstractObjectivesSodium bromate is a strong oxidant, and bromate intoxication can cause irreversible severe-to-profound sensorineural hearing loss. This paper reports the first case in the English literature of bromate-induced hearing loss with hearing recovery measured by formal audiological assessment.Case reportA 72-year-old woman was admitted to hospital with complaints of profound hearing loss, nausea, diarrhoea and anuria after bromate ingestion in a suicide attempt. On admission, pure tone audiometry and auditory brainstem responses showed profound bilateral deafness. Under the diagnosis of bromate-induced acute renal failure and sensorineural hearing loss, continuous haemodiafiltration was performed. When dialysis was discontinued, pure tone audiometry and auditory brainstem responses showed partial threshold recovery from profound deafness.ConclusionSevere-to-profound sensorineural hearing loss is a common symptom of bromate intoxication. Bromate-induced hearing loss may be partially treated, and early application of continuous haemodiafiltration might be useful as a treatment for this intractable condition.

scholarly journals Aerial low-frequency hearing in captive and free-ranging harbour seals (Phoca vitulina) measured using auditory brainstem responses

2016 ◽  
Vol 202 (12) ◽  
pp. 859-868 ◽  
Author(s):  
Klaus Lucke ◽  
Gordon D. Hastie ◽  
Kerstin Ternes ◽  
Bernie McConnell ◽  
Simon Moss ◽  
...  
Keyword(s):  
Low Frequency ◽  
Auditory Brainstem ◽  
Phoca Vitulina ◽  
Auditory Brainstem Responses ◽  
Harbour Seals ◽  
Free Ranging
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