Abstract
From the data presented 3 general conclusions may be drawn: (a) the rat is able to adapt to the dual streses of cold and restraint; the rapidity of this adaptation suggests that a familiarity or emotional component may be involved in the process; (b) there is loss of the adaptation if it is not "reinforced7quot; by the application of the stress; (c) adaptation to stress may protect against the body temperature drop in this restraint-induced (emotional) hypothermia, since repeated exposures of the rat to forced muscular activity as well as adaptation to cold and/or restraint inhibit this hypothermia.

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