Document Detail

Encoding of alternating acoustical signals in the medial geniculate body of guinea pigs.
MedLine Citation:
PMID:  7451375     Owner:  NLM     Status:  MEDLINE    
In unanaesthetized guinea pigs 102 single units of the medial geniculate body were recorded under acoustical stimulation with alternating noise and tone impulses. The temporal parameters of the signals were chosen in close relation to psychoacoustical pulsation-threshold measurements. Most units showed a strong interaction between the responses of the non-simultaneously presented signal components (temporal suppression). The phasic part of each impulse-evoked response was more affected by the suppression than the tonic part. Thus, two regions of responsiveness could be verified: a region of pure tonic discharge and a region of tonic and phasic discharge. The borderline between both regions was defined as 'on-threshold'. The temporal suppression effect of the discharge rate did depend on impulse duration, impulse shape, gap duration, and the levels of the signal components. The overall unit-response characteristic-especially the lac of temporal onset information--suggested a close relation between psychoacoustical pulsation threshold and physiological 'on-threshold'.
C Schreiner
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Hearing research     Volume:  3     ISSN:  0378-5955     ISO Abbreviation:  Hear. Res.     Publication Date:  1980 Dec 
Date Detail:
Created Date:  1981-03-17     Completed Date:  1981-03-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7900445     Medline TA:  Hear Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  265-78     Citation Subset:  IM    
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MeSH Terms
Acoustic Stimulation / methods
Auditory Perception / physiology*
Auditory Threshold / physiology
Geniculate Bodies / physiology*
Guinea Pigs
Perceptual Masking / physiology

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