[Raphe nucleus and corticorophic activity in pigeons].
Multiple electrolytic lesions were placed in the raphe area of pigeons. Basal plasma corticosterone level (B) was found not to be altered. Stress-induced adrenocortical activation was markedly reduced in raphe lesioned pigeons as compared to controls. Electrical stimulation of the nucleus raphes in permanently implanted, unrestrained and unanesthetized birds induced a significant rise in B. However the magnitude of the response to raphe stimulating was lower (1/2 approximately) and especially later than after hypothalamic stimulation since it paralleled exactly the pattern of stress induced activation.
D000818:Animals; D001933:Brain Stem / Q000503:physiopathology*; D003345:Corticosterone / Q000097:blood*; D004558:Electric Stimulation; D005260:Female; D007031:Hypothalamus / Q000503:physiopathology; D008297:Male; D011903:Raphe Nuclei / Q000503:physiopathology*; D013312:Stress, Physiological / Q000503:physiopathology*
D003345:Corticosterone
Nucleus raphes et activité corticotrope chez le pigeon.