Motivational variables affecting the rate of behavior maintained by intracranial stimulation.

Abstract

Ovariectomized rats with chronic septal electrodes were trained in a lever-pressing situation on an alternating schedule of intracranial-stimulation reward and milk reward. Performance rates were measured under various conditions of motivation. Induced estrus had no effect on behavior under either reward condition. Food deprivation produced higher pressing rates for both stimulation and milk reward, but addition of estrus to food deprivation did not further increase the performance rates. From Psyc Abstracts 36:02:2DE02H. (PsycINFO Database Record (c) 2006 APA, all rights reserved)