posterior cerebral commissure


n.

A thin band of white matter crossing from side to side beneath the habenula of the pineal body and over the entrance to the cerebral aqueduct and largely composed of fibers connecting mesoencephalic regions.

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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.