The projection of nucleus lateralis dorsalis of monkey to basomedial temporal cortex

Retrograde degeneration in thalamus was studied in eight Macaque monkeys following resection of basomedial temporal cortex. In addition to its known projection to the posterior cingulate region, nucleus lateralis dorsalis (LD) projects, perhaps via the fornix, to the parahippocampal gyrus. Convexal temporal neocortex receives fibers from the medial pulvinar (PM). Nucleus lateralis posterior (LP) may project to cortex intervening between the projection fields for LD and PM. A stereotactic lesion in fornix of one animal demonstrates corticothalamic projection to LD, LP and to a lesser extent to PM, AV, AM, and AD.