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Papers of the Week


1975 Jun


Pain


1


2

Classic Paper

Analgesia induced by electrical stimulation of the inferior centralis nucleus of the raphe in the cat.

Authors

Oliveras JL, Redjemi F, Guilbaud G, Besson JM
Pain. 1975 Jun; 1(2):139-45.
PMID: 1088446.

Abstract

In the cat, electrical stimulation of the inferior central nucleus of the raphe induces a powerful analgesia. This stimulation totally suppresses the behavioural reactions elicited by strong pinches applied to the tail or to the four limbs; it strongly modifies the threshold of the jaw opening reflex obtained by tooth pulp stimulation and considerably affects the behavioural reactions elicited by continuing such stimulation. The results can be considered as evidence that the mechanism of analgesia from the inferior raphe nucleus is similar to that already described in the dorsal raphe nucleus. The analgesia obtained by stimulation of raphe nuclei seems to be sustained by serotoninergic mechanisms and relationships between these are discussed. In preliminary experiments, analgesia induced by CI stimulation has been suppressed by administration of naloxone, a specific opiate antagonist.