Abstract
Bilateral stimulation of the tegmentum before or during a response impaired performance in reversal learning. Stimulation after a response had no effect. Bilateral stimulation of caudate nucleus after a response retarded reversal learning. Unilateral stimulation of caudate and tegmentum during a response produced position effects opposite to those produced when unilateral stimulation was given before a response. From Psyc Abstracts 36:01:1DE21T. (PsycINFO Database Record (c) 2006 APA, all rights reserved)