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Pronunciation: pu-ta'men

Definition: The outer, larger, and darker gray of the three portions into which the lenticular nucleus is divided by laminae of white fibers; it is connected with the caudate nucleus by bridging bands of gray substance that penetrate the internal capsule. Its histologic structure is similar to that of the caudate nucleus together with which it composes the striatum.

[L. that which falls off in pruning, fr. puto, to prune]

See Also: striate body, lenticular nucleus

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.