Fig. 5 and 6.     Camera lucida drawings of coronal forebrain sections, arranged from rostral (5A) to caudal (6B) to illustrate the distribution of PHA-L labeled fibers in relation to cholinergic neurons following tracer deposit in the far-lateral hypothalamus (case L125). The hatched area in the inset shows the maximum extent of the region containing neurons labeled at the injection site. In these and the following figures (Figs. 7-17) only the most proximal dendritic segments of cholinergic neurons were drawn, and most of the dorsal and ventral striatal cholinergic neurons have been omitted for simplicity. Sections were Nissl counterstained, and adjacent sections immunostained for GAD for delineation of pallidal borders.