Otoacoustic Emissions and Medial Olivocochlear Suppression during Auditory Recovery from Acoustic Trauma in Humans

2001 ◽  
Vol 121 (2) ◽  
pp. 278-283 ◽  
Author(s):  
E. Veuillet, V. Martin, B. Suc, J.
Keyword(s):  
Otoacoustic Emissions ◽  
Acoustic Trauma ◽  
Medial Olivocochlear

scholarly journals Frequency tuning of the contralateral medial olivocochlear reflex in humans

2012 ◽  
Vol 108 (1) ◽  
pp. 25-30 ◽  
Author(s):  
Wei Zhao ◽  
Sumitrajit Dhar
Keyword(s):  
Otoacoustic Emissions ◽  
Frequency Tuning ◽  
Acoustic Trauma ◽  
Fixed Frequency ◽  
Sound Perception ◽  
Spontaneous Otoacoustic Emissions ◽  
Functional Roles ◽  
Cochlear Gain ◽  
Medial Olivocochlear

Activation of the medial olivocochlear (MOC) efferents attenuates cochlear gain and reduces the amplitudes of mechanical, electrical, and neural cochlear outputs. The functional roles of the MOC efferents are not fully understood, especially in humans, despite postulations that they are involved in protection against acoustic trauma, facilitation of transient-sound perception, etc. Delineating the frequency tuning properties of the MOC efferents would provide critical evidence to support or refute these postulated functional roles. By utilizing spontaneous otoacoustic emissions (SOAEs), a cochlear measure sensitive to MOC modulation, we systematically demonstrate in humans that the contralateral MOC reflex is tuned to a fixed frequency band between 500 and 1,000 Hz independent of SOAE frequency. Our results question the role of the MOC reflex in protection against acoustic trauma or facilitation of transient-sound perception.

Does Hyperandrogenism Affect the Otoacoustic Emissions and Medial Olivocochlear Reflex in Female Adults?

2013 ◽  
Vol 34 (5) ◽  
pp. 784-789 ◽  
Author(s):  
Erdem Eren ◽  
Ece Harman ◽  
Seçil Arslanoğlu ◽  
Kazm Önal ◽  
Hüseyin Katlmiş
Keyword(s):  
Otoacoustic Emissions ◽  
Medial Olivocochlear Reflex ◽  
Medial Olivocochlear

Otoacoustic Emissions and Persistent Tinnitus after Acute Acoustic Trauma

2006 ◽  
pp. 970-975 ◽  
Author(s):  
Jean-Bertrand Nottet ◽  
Annie Moulin ◽  
Nicolas Brossard ◽  
Beno??t Suc ◽  
Agn??s Job
Keyword(s):  
Otoacoustic Emissions ◽  
Acoustic Trauma ◽  
Acute Acoustic Trauma

Medial Olivocochlear Reflex Effects on Amplitude Growth Functions of Long- and Short-Latency Components of Click-Evoked Otoacoustic Emissions in Humans

2021 ◽  
Author(s):  
Shawn Goodman ◽  
Sriram Boothalingam ◽  
Jeffery T Lichtenhan
Keyword(s):  
Otoacoustic Emissions ◽  
Dynamic Range ◽  
Short Latency ◽  
Medial Olivocochlear Reflex ◽  
Time Frequency ◽  
Growth Functions ◽  
Sound Levels ◽  
Amplitude Attenuation ◽  
Slope Change ◽  
Medial Olivocochlear

Functional outcomes of medial olivocochlear reflex (MOCR) activation, such as improved hearing in background noise and protection from noise damage, involve moderate to high sound levels. Previous noninvasive measurements of MOCR in humans focused primarily on otoacoustic emissions (OAEs) evoked at low sound levels. Interpreting MOCR effects on OAEs at higher levels is complicated by the possibility of the middle-ear muscle reflex and by components of OAEs arising from different locations along the length of the cochlear spiral. We overcame these issues by presenting click stimuli at a very slow rate and by time-frequency windowing the resulting click-evoked (CE)OAEs into short-latency (SL) and long-latency (LL) components. We characterized the effects of MOCR on CEOAE components using multiple measures to more comprehensively assess these effects throughout much of the dynamic range of hearing. These measures included CEOAE amplitude attenuation, equivalent input attenuation, phase, and slope of growth functions. Results show that MOCR effects are smaller on SL components than LL components, consistent with SL components being generated slightly basal of the characteristic frequency region. Amplitude attenuation measures showed the largest effects at the lowest stimulus levels, but slope change and equivalent input attenuation measures did not decrease at higher stimulus levels. These latter measures are less commonly reported and may provide insight into the variability in listening performance and noise susceptibility seen across individuals.

Effects of Type 2 Diabetes on Otoacoustic Emissions and the Medial Olivocochlear Reflex

2014 ◽  
Vol 150 (6) ◽  
pp. 1033-1039 ◽  
Author(s):  
Erdem Eren ◽  
Ece Harman ◽  
Seçil Arslanoğlu ◽  
Kazım Önal
Keyword(s):  
Type 2 Diabetes ◽  
Otoacoustic Emissions ◽  
Medial Olivocochlear Reflex ◽  
Medial Olivocochlear

Transient‐evoked otoacoustic emissions and high‐frequency acoustic trauma in the guinea pig

1995 ◽  
Vol 97 (5) ◽  
pp. 3012-3020 ◽  
Author(s):  
Paul Avan ◽  
Pierre Bonfils ◽  
Drystan Loth ◽  
Michel Elbez ◽  
Manuel Erminy
Keyword(s):  
Guinea Pig ◽  
High Frequency ◽  
Otoacoustic Emissions ◽  
Acoustic Trauma ◽  
Transient Evoked Otoacoustic Emissions

Differences in Responses from the Cochleae and Central Nervous Systems of Females with Low versus High Acceptable Noise Levels

2006 ◽  
Vol 17 (09) ◽  
pp. 667-676 ◽  
Author(s):  
Ashley W. Harkrider ◽  
Joanna W. Tampas
Keyword(s):  
Auditory System ◽  
Background Noise ◽  
Otoacoustic Emissions ◽  
Auditory Brainstem ◽  
Auditory Brainstem Responses ◽  
Intersubject Variability ◽  
Hearing Sensitivity ◽  
Central Regions ◽  
Central Nervous Systems ◽  
Medial Olivocochlear

Studies of acceptable noise level (ANL) consistently report large intersubject variability in acceptance of background noise while listening to speech. This variability is not related to age, gender, hearing sensitivity, type of background noise, speech perception in noise performance, or efferent activity of the medial olivocochlear pathway. An exploratory study was conducted to determine if differences in aggregate responses from the peripheral and central auditory system can account for intersubject variability in ANL. Click-evoked otoacoustic emissions (CEOAEs), binaural auditory brainstem responses (ABRs), and middle latency responses (MLRs) were measured in females with normal hearing with low (n = 6) versus high (n = 7) ANLs. Results of this preliminary study indicate no differences between the groups for CEOAEs or waves I or III of the ABR. Differences between the two groups emerge for the amplitudes of wave V of the ABR and for the Na-Pa component of the MLR, suggesting that physiological variations arising from more central regions of the auditory system may mediate background noise acceptance.

Sign in / Sign up

Export Citation Format

Share Document