Anatomical organization of thalamic projections to the first somatic sensory cortex in the cat.

peroxidase (HRP) . The SI receives fibers from the posteromedial (VPM) and posterolateral ventral nuclei (VPL) in a topically organized manner. The anteroventral part of the face area of SI receives inputs from the ventromedial portion of the VPM, exclusive of the medial parvocellular part, whereas the posterodorsal part of the face area receives fibers from the dorsolateral part of the VPM. The forelimb area of SI receives fibers from the ventromedial part of VPL, and the hindlimb area from the dorsolateral part of VPL. Cortical projections of the VPM and VPL to SI appear to be organized topically in the dorsoventral, mediolateral and anteroposterior