Fig. 14. Dopaminergic neurons of the rat retina revealed by an antibody against tyrosine hydroxylase. Two immunoreactive dopaminergic neuronal perikarya are seen at the border of the inner nuclear layer and the inner plexiform layer. Their dendrites extend primarily as a horizontal sheet in the distalmost portion of the inner plexiform layer, but occasional processes (arrows) pass through the inner nuclear layer to end in the vicinity of the OPL. (Unpublished data of R. Gabriel and P. Witkovsky; × 600)