Thalamic input to the dorsal and lateral prefrontal cortex. Coronal cross sections through representative levels of the thalamus are shown for each conventional tracer experiment. Neurons labeled by retrograde transport from each area are indicated bydots, and nuclear borders are shown bysolid or dotted lines. Thalamic nomenclature and abbreviations are according to Olszewski (1952).D, Dorsal; M, medial; Cd, caudate; c, pars caudalis; dc, pars densocellularis; Fx, fornix; IC, internal capsule; LD, nucleus lateralis dorsalis;mc, pars magnocellularis; mf, pars multiformis; pc, pars parvocellularis; m, pars medialis; R, nucleus reticularis;VPI, nucleus ventralis posterior inferior;VPL, nucleus ventralis posterior lateralis;X, area X.