Sensitization of amphetamine-stereotypy reduces plasma corticosterone: implications for stereotypy as a coping response - PubMed (original) (raw)
Sensitization of amphetamine-stereotypy reduces plasma corticosterone: implications for stereotypy as a coping response
G Mittleman et al. Behav Neural Biol. 1991 Sep.
Abstract
The potential coping functions of amphetamine-induced stereotypy were investigated using a physiological index of stress or arousal, plasma corticosterone level. A series of five injections of d-amphetamine was used to enhance stereotyped behavior in control animals as well as in rats with bilateral dopamine-depleting lesions of the caudate-putamen. This regimen of amphetamine injections significantly increased stereotyped behavior and also reduced the normal elevation in corticosterone produced by treatment with d-amphetamine. This effect was apparent in both control and lesioned animals. These results support the hypothesis that amphetamine-induced stereotyped behavior functions to reduce stress or arousal and additionally suggest that this effect is largely independent of underlying dopaminergic mechanisms.
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