Camera lucida reconstruction of the somatodendritic domain of a dorsal tier SNc neuron (A), the axon of which is depicted in Figure2D, and a ventral tier SNc neuron (B), the axon of which is illustrated in Figure6. The arrows indicate the axon. Dt SNc, Dorsal tier of SNc; Vt SNc, ventral tier of SNc. Definitions of abbreviations apply to all figures.