Fig. 4.     Camera-lucida-assisted line drawings of PHA-L-labeled projections in the basalforebrain ascending from the medial portion of the VTA (case 93128). PHA-L-labeled fibers and boutons (in black) are shown in relation to ChAT-immunoreactive cell bodies (drawn in red) at 4 different posterior-anterior levels (A-D, respectively). Figures were drawn from sections processed for PHA-L-ChAT double-labeling immunocytochemistry.