Interaction of neocortical lesion size and interoperative experience in retention of a learned brightness discrimination.

Abstract

A learned brightness discrimination that would be lost following a bilateral posterior neocortical lesion in rats (Ns = 64 in Exp. I and 74 in Exp. II) can be spared if the tissue is removed in 2 successive unilateral operations. If the lesion involves about 10% of the total neocortex nonspecific visual stimulation is sufficient to obtain sparing; if the lesion involves about 20% of the total neocortex specific practice of the habit is necessary. (PsycINFO Database Record (c) 2006 APA, all rights reserved)