Effects of hypophysectomy and adrenalectomy on naloxone-induced analgesia.
Experiment 1 demonstrated that pairings of the opiate antagonist, naloxone, with a heated floor came to induce analgesia, as indexed by the latencies with which rats licked their paws. This analgesia appears to be neurally mediated because it is unaffected by either hypophysectomy (experiment 2) or adrenalectomy (experiment 3). However, there was evidence for a pituitary involvement, as its removal potentiated the analgesic effect accruing from naloxone-stressor pairings.
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School of Psychology, University of New South Wales, Sydney, Australia.
Westbrook
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D000315:Adrenalectomy; D000324:Adrenocorticotropic Hormone / Q000494:pharmacology; D000698:Analgesia; D000818:Animals; D007016:Hypophysectomy; D008297:Male; D009270:Naloxone / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D011930:Reaction Time / Q000187:drug effects; D013315:Stress, Psychological / Q000503:physiopathology
D009270:Naloxone; D000324:Adrenocorticotropic Hormone