Abolition of the morphine effect on body temperature in midbrain raphe lesioned rats
- 1 May 1972
- journal article
- Published by Oxford University Press (OUP) in Journal of Pharmacy and Pharmacology
- Vol. 24 (5) , 374-377
- https://doi.org/10.1111/j.2042-7158.1972.tb09010.x
Abstract
The hyperthermia and the hypothermia elicited by 5 mg/kg, i.p. or 30 mg/kg i.p. of morphine in rats are abolished by a previous lesion of the midbrain raphe resulting in a lowering of forebrain 5-HT and 5-hydroxyindolacetic acid. Lesions lateral to the midbrain raphe which do not modify brain 5-HT are without effect on body temperature changes induced by morphine. Animals lesioned in the midbrain raphe are still able to respond with a hyperthermia or with a hypothermia when they are treated respectively with 2,4-dinitrophenol or phentolamine.Keywords
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