Document Detail

Effects of acute noise traumata on whole-nerve and single-unit activity.
MedLine Citation:
PMID:  485938     Owner:  NLM     Status:  MEDLINE    
This paper gives some preliminary results of a research program on the effects of noise traumata on cochlear functioning. Measurements reported here include: the latency of the whole-nerve (compound) action potential (AP), the selectivity of frequency-tuning curves (e.g., the Q10-values) measured for the AP (with a forward-masking technique) and for single units in the antero-ventral cochlear nucleus (AVCN), the degree of phase-locking of the action potentials of these units to the stimulus waveform, and the phase of the stimulus waveform to which these potentials are locking. The noise traumata were induced during the experiments. After inducement of the traumata we found: an increase of AP latency, if a sinusoidal stimulas was presented at the same sound pressure level as before the trauma; no effect on AP latency (for most stimulus frequencies), if the latency values measured at the pre- and post-trauma thresholds were compared; a decrease of Q10-values of the AP frequency-tuning curves, (the pre-trauma Q10-values were small in comparison with single nerve fiber data); a decrease of the Q10-values of the single-unit frequency-tuning curves; no effect on the degree of phase-locking of the single-unit potentials to the stimulus waveform; an increase of cochlear response time calculated from the phase of the stimulus waveform to which the single-unit potentials are locking as a function of stimulus frequency.
G F Smoorenburg; E van Heusden
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Archives of oto-rhino-laryngology     Volume:  224     ISSN:  0302-9530     ISO Abbreviation:  Arch Otorhinolaryngol     Publication Date:  1979  
Date Detail:
Created Date:  1979-11-29     Completed Date:  1979-11-29     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0414105     Medline TA:  Arch Otorhinolaryngol     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  117-24     Citation Subset:  IM    
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MeSH Terms
Action Potentials
Cochlea / physiopathology*
Hearing Loss, Noise-Induced*

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