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pyramidal decussation

pyramidal decussation in Medicine

pyramidal decussation n.
Crossing of the bundles of the pyramidal tracts at the lower border of the medulla oblongata. Also called motor decussation.

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