Identification of a Prolonged Post-synaptic Potential of Cerebral Cortex. ∗

Abstract

Summary

On the basis of threshold differences, depth of origin in cerebral cortex and pharmacological selectivity, we conclude that 15 msec. negative potential assignable to activity in apical dendrites and ensuing 150–300 msec. slow negative wave are separate neural processes. Our evidence suggests that the slow negativity seen in the wake of dendritic potential is a sign of an independent post-synaptic process having unusually long time course.