Journal of Neuroscience, Vol 2, 513-520, Copyright © 1982 by Society for Neuroscience
Cholinergic projections from the basal forebrain of rat to the amygdala
T Nagai, H Kimura, T Maeda, PL McGeer, F Peng and EG McGeer
Cholinergic afferents to the amygdala from the basal forebrain were studied
using di-isopropyl fluorophosphate-AChE histochemistry in combination with
retrograde tracing using various fluorescent dyes. Cells sending their
axons to the amygdala and staining intensely for AChE were located mainly
in the nucleus of the substantia innominata. They also were found in the
ventral part of the globus pallidus, the horizontal limb of the nucleus
tractus diagonalis Broca, and the nucleus interstitialis ansae
lenticularis. A correspondence was established between these cells and
cells staining for choline acetyltransferase by immunohistochemistry in
both distribution and morphology. Non-cholinergic neurons which send their
axons to the amygdala also were found in the substantia innominata complex.