Evidence that neurons of the central amygdaloid nucleus directly project to the site concerned with circulatory and respiratory regulation in the ventrolateral nucleus of the cat: a WGA-HRP study.
Projections from the central amygdaloid nucleus (ACE) to the ventrolateral nucleus (VLN) of the medulla oblongata were studied using the wheat germ agglutinin-horseradish peroxidase (WGA-HRP) method. WGA-HRP was injected into the rostral VLN, where a pressor response associated with bradycardiac and apneustic responses was elicited by microinjection of glutamate, and into the caudal VLN, where a depressor response associated with bradycardiac and apneustic responses was elicited. In both experiments, HRP-labeled cells were found in the ACE. These results suggest that the ACE may send direct projections to the VLN and may play a role in cardiovascular and/or respiratory control mechanisms.
Department of Physiology, Gunma University School of Medicine, Maebashi, Japan.
K
K
Takayama
J
J
Okada
M
M
Miura
D000679:Amygdala / Q000166:cytology / Q000502:physiology*; D000818:Animals; D001794:Blood Pressure; D002320:Cardiovascular Physiological Phenomena; D002415:Cats; D004558:Electric Stimulation; D005260:Female; D006339:Heart Rate; D006735:Horseradish Peroxidase; D008297:Male; D008526:Medulla Oblongata / Q000166:cytology / Q000502:physiology*; D009434:Neural Pathways / Q000033:anatomy & histology / Q000502:physiology; D012119:Respiration; D018998:Wheat Germ Agglutinin-Horseradish Peroxidase Conjugate; D014909:Wheat Germ Agglutinins
D018998:Wheat Germ Agglutinin-Horseradish Peroxidase Conjugate; D014909:Wheat Germ Agglutinins; D006735:Horseradish Peroxidase