Effects of lesioning the dorsal and intermediate acoustic striae on binaural interaction at the inferior colliculus

Contralateral clicks normally activate units in the inferior colliculus of rats. Ipsilateral clicks usually inhibit this activity when their intensity just exceeds the contralateral intensity. When the contralateral dorsal and intermediate acoustic striae are lesioned as they pass over the restiform...

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Bibliographic Details
Published in:Experimental brain research 1977-05, Vol.28 (1-2), p.211-219
Main Authors: Bengry, M F, Silverman, M S, Clopton, B M
Format: Article
Language:English
Subjects:
Animals
Auditory Pathways - physiology
Auditory Perception - physiology
Cerebral Ventricles - physiology
Evoked Potentials
Functional Laterality - physiology
Inferior Colliculi - physiology
Neural Inhibition
Rats
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Summary:Contralateral clicks normally activate units in the inferior colliculus of rats. Ipsilateral clicks usually inhibit this activity when their intensity just exceeds the contralateral intensity. When the contralateral dorsal and intermediate acoustic striae are lesioned as they pass over the restiform body, ipsilateral clicks inhibit even if they are substantially less intense than contralateral clicks. Contralateral click thresholds for unit activation are elevated by about 10 dB, but this shift in sensitivity cannot account for the marked advantage gained by the ipsilateral inhibitory input. These findings suggest that one or both of these pathways contributes heavily to binaural interaction at the inferior colliculus.
ISSN:0014-4819
1432-1106
DOI:10.1007/BF00237097