Functional analysis of evoked potentials in rat’s sensory cortex

Andrzej Wróbel

Published: 2002-05-15

GICID: 01.3001.0000.3497

Available language versions: en

Issue: Postepy Hig Med Dosw 2002; 56 (3)

Abstract

In the barrel cortex of behaving rat potentials evoked to vibrissa stimulation are composed from two main principal components which can be attributed to activation of two pyramidal cell populations: supra- and infragranular. The classical aversive stimulus favors the appearance of EPs dominated by a component characteristic of infragranular cells. We hypothesize that neuromodulatory action elicited by contextual stimulation activates all involved cortical neurons which results in opening the transmission gate to the surrounding columns.

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