EFFECTS OF HIGH FAT DIETS ON CALORIC INTAKE, BODY WEIGHT, AND HEAT-ESCAPE RESPONSES IN NORMAL AND HYPERPHAGIC RATS

13 adult male Charles River rats increased caloric intake, body weight, and operant responding to escape heat when fed diets with high lipid content. Ss made hyperphagic through hypothalamic lesions showed characteristic changes in body weight and alterations in heat-escape responding which were related to increases and decreases in the body weight measures. The increased responding in both normal and hyperphagic Ss is behavioral compensation for restricted body heat loss resulting from increments in depot fat insulation. (26 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1969 American Psychological Association.