thalamus thal·a·mus (thāl'ə-məs)
n. pl. thal·a·mi (-mī')
A large ovoid mass of gray matter that forms the larger dorsal subdivision of the diencephalon and is located medial to the internal capsule and to the body and tail of the caudate nucleus. It functions in the relay of sensory impulses to the cerebral cortex.
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