decussation is a topic covered in the Taber's Medical Dictionary.

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(dē″kŭ-sā′shŏn )


1. A crossing of structures in the form of an X.
2. A place in which linear structures cross.
SYN: SEE: chiasm; chiasma
3. In reference to axons in the central nervous system, the crossing of the midplane (the sagittal plane) of the brain or spinal cord en route to a target on the contralateral side

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