Responses of raphespinal and other bulbar raphe neurones to stimulation of the periaqueductal gray in the cat.
The relationship between the periaqueductal gray (PAG) and nucleus raphe magnus (NRM) has been investigated. Electrical stimulation of the PAG in decerebrate or chloralose anaesthetised cats resulted in synaptic activation of raphespinal and other cells in NRM. These results support the view that analgesia of the limbs, trunk and tail produced by stimulation of the PAG in conscious animals may be mediated by synaptic activation of raphespinal neurones.
Lovick
T A
TA
Department of Physiology, Medical School, University of Birmingham, Birmingham B15 2TJ United Kingdom.
West
D C
DC
Wolstencroft
J H
JH