decussation

noun de·cus·sa·tion \ ˌde-kə-ˈsā-shən , ˌdē-ˌkə- \

Definition of decussation

1 : the action of crossing (as of nerve fibers) especially in the form of an X
2 : a crossed tract of nerve fibers passing between centers on opposite sides of the nervous system

First Known Use of decussation

circa 1656


Medical Dictionary

decussation

noun de·cus·sa·tion \ ˌdē-(ˌ)kə-ˈsā-shən \

medical Definition of decussation

1 : the action of intersecting or crossing (as of nerve fibers) especially in the form of an X — see pyramidal decussation
2 a : a band of nerve fibers that connects unlike centers on opposite sides of the nervous system
b : a crossed tract of nerve fibers passing between centers on opposite sides of the central nervous system : commissure

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