Cholinergic projections from the globus pallidus to the lateral amygdaloid nucleus in the cat.

Direct projections from the globus pallidus (GP) to the lateral amygdaloid nucleus (A1) were found in the cat by the anterograde and retrograde tracing methods. Pallido-amygdaloid fibers originated mainly from the caudal half of the GP and distributed throughout the entire extent of the A1; most densely in the lateral part of the A1. Choline acetyltransferase immunohistochemistry in combination with retrograde fluorescent tracing indicated that most pallido-amygdaloid neurons were cholinergic.