Document Detail


Frequency threshold curves and simultaneous masking functions in high-threshold, broadly-tuned, fibres of the guinea pig auditory nerve.
MedLine Citation:
PMID:  6511675     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Tuning curves for simultaneous masking were measured electrophysiologically, in single fibres of the auditory nerve. The recordings were made in guinea pigs with cochlear hearing losses. The masking paradigm was an analogy of that used in the determination of psychophysical tuning curves in man. Below the probe frequency, the slope of the masking function was similar to that of the frequency-threshold curve. Here, changes in the slope of the frequency-threshold curve with hearing loss were closely mirrored by changes in the slope of the masking function. Above the probe frequency, however, the masking function for low-threshold fibres had a shallower slope than the frequency-threshold curve. When the high-frequency slope of the frequency-threshold curve became shallower with hearing loss, the changes were not mirrored in the masking function, until the threshold was raised to 70-80 dB SPL. The results are discussed in terms of the influence of cochlear nonlinearity on frequency resolution, and the vulnerability of the nonlinearity.
Authors:
J O Pickles
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Hearing research     Volume:  16     ISSN:  0378-5955     ISO Abbreviation:  Hear. Res.     Publication Date:  1984 Oct 
Date Detail:
Created Date:  1985-01-31     Completed Date:  1985-01-31     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7900445     Medline TA:  Hear Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  91-9     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Auditory Threshold / drug effects,  physiology*
Evoked Potentials, Auditory / drug effects
Guinea Pigs
Loudness Perception / physiology
Nerve Fibers / drug effects,  physiology*
Perceptual Masking / physiology*
Pitch Perception / drug effects,  physiology*
Psychoacoustics
Urethane / toxicity
Vestibulocochlear Nerve / drug effects,  physiology*
Chemical
Reg. No./Substance:
51-79-6/Urethane

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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