Fig. 18.     D: Camera lucida drawing (63x) made from a region shown in box in (A), illustrating the relationship of PHA-L labeled fibers/terminals and ChAT labeled neurons in the sublenticular substantia innominata following a tracer injection in the lateral hypothalamus (case L125).  B,C:  Micrographs of neurons in boxed areas in (D) shown at higher magnification.  Arrows denote PHA-L labeled terminal varicosities in close apposition to cholinergic neurons.  Scale bar: 10 µm