Morphometric analysis of ventral mesencephalic neurons retrogradely labeled with Fluoro-Gold following injections in the shell, core and rostral pole of the rat nucleus accumbens.

Morphologically distinct subsets of mesotelencephalic neurons were sought following retrograde transport of Fluoro-Gold from iontophoretic injections relatively restricted to the medial shell, core or rostral pole subterritories of the nucleus accumbens. The diameter and lengths of Fluoro-Gold immunolabeled dendrites of medial shell-projecting neurons were less than those of core and rostral pole-projecting neurons.