Abstract：
:This study addressed the issue of multiple parallel auditory processing systems and their relationship to the skull-recorded auditory evoked potentials (AEPs) in the unanesthetized, unrestrained rat. In the preceding paper (Brain Res., 602 (1993) 240-250) it has been shown that auditory cortex activity does not contribute significantly to the vertex maximal AEPs recorded from the dorsal skull of the rat. In the present study, mapping of the AEP skull distribution revealed two sets of components: one set maximal at the dorsal skull vertex, and another set at the lateral skull), but not the early (P7-P11, N15) lateral skull components generated in auditory cortex. Bilateral auditory cortex ablation eliminated the lateral skull maximal AEP components, but not the dorsal skull maximal components. These findings support extensive parallel processing of auditory inputs (reflected by the dorsal AEPs) in the absence of primary auditory cortex. Ablation of primary auditory cortex did result in a modulation of the dorsal skull AEPs, indicative of an interaction between the geniculocortical system and the parallel system which generates the dorsal AEPs.
journal_name
Brain Resjournal_title
Brain researchauthors
Simpson GV,Knight RTdoi
10.1016/0006-8993(93)90690-osubject
Has Abstractpub_date
1993-02-05 00:00:00pages
251-63issue
2eissn
0006-8993issn
1872-6240pii
0006-8993(93)90690-Ojournal_volume
602pub_type
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