Medial olivocochlear bundle activation and perceived auditory intensity in humans

In order to test the hypothesis of a role of cochlear efferent activity in intensity perception in humans, loudness functions, loudness integration, and loudness summation were measured in the absence and in the presence of contralateral noise in normal-hearing subjects. Additionally, relationships...

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Bibliographic Details
Published in:Physiology & behavior 2002-11, Vol.77 (2), p.311-320
Main Authors: Morand-Villeneuve, N, Garnier, S, Grimault, N, Veuillet, E, Collet, L, Micheyl, C
Format: Article
Language:English
Subjects:
Acoustic Stimulation
Acoustics
Adult
Audition
Biological and medical sciences
Cochlea - physiology
Cochlea - surgery
Cochlear compression
Contralateral stimulation
Engineering Sciences
Feedback - physiology
Female
Fundamental and applied biological sciences. Psychology
Hearing Tests
Humans
Loudness
Loudness Perception - physiology
Male
Medial olivocochlear bundle
Meniere Disease - physiopathology
Meniere Disease - surgery
Olivary Nucleus - physiology
Perception
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Recruitment Detection, Audiologic
Vertigo - physiopathology
Vertigo - surgery
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Summary:In order to test the hypothesis of a role of cochlear efferent activity in intensity perception in humans, loudness functions, loudness integration, and loudness summation were measured in the absence and in the presence of contralateral noise in normal-hearing subjects. Additionally, relationships with the effect of the noise on evoked otoacoustic emissions (EOAEs) were tested, and comparisons with vestibular neurotomy patients were performed. Overall, the results failed to demonstrate significant effects of contralateral noise stimulation on loudness functions and loudness integration. Furthermore, no significant differences were found in vestibular neurotomy patients. A significant effect of contralateral noise on loudness summation was noted, but was not related to the effect on otoacoustic emissions. The present results fail to support the notion that efferent influences onto the cochlear compression have a significant perceptual effect.
ISSN:0031-9384
1873-507X
DOI:10.1016/S0031-9384(02)00855-7