decussation

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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

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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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