Anatomical evidence for inputs to ventrolateral medullary catecholaminergic neurons from the midbrain periaqueductal gray of the rat.

Previous studies have shown that the midbrain periaqueductal gray (PAG) projects to the ventrolateral medulla (VLM). Here, we studied PAG projections to the area of A1/C1 neurons in the VLM in the rat using phaseolus vulgaris leucoagglutinin (PHA-L) anterograde tracing combined with immunocytochemistry for tyrosine hydroxylase (TH) or phenylethanolamine N… CONTINUE READING