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decussation
dec·us·sa·tion D0083100 (dĕk′ə-sā′shən, dē′kə-)n.1. A crossing in the shape of an X.2. Anatomy An X-shaped crossing, especially of nerves or bands of nerve fibers, connecting corresponding parts on opposite sides of the brain or spinal cord.de•cus•sa•tion (ˌdi kəˈseɪ ʃən, ˌdɛk ə-)
n. 1. an instance of crossing or the condition of being crossed in the form of an X. 2. a nerve or tract of nerve fibers that crosses from one side of the central nervous system to the other. [1650–60] decussationthe state of being in the form of an X. See also joining.See also: FormThesaurus| Noun | 1. | decussation - an intersection or crossing of two tracts in the form of the letter Xchiasm, chiasmaanatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure"chiasma opticum, optic chiasm, optic chiasma - the crossing of the optic nerves from the two eyes at the base of the brain |
TranslationsEncyclopediaSeedecussatedecussation
decussation [de″kus-sa´shun] a crossing over; the intercrossing of fellow parts or structures in the form of an X.decussation of pyramids the anterior part of the lower medulla oblongata in which most of the fibers of each pyramid intersect as they cross the midline and descend as the lateral corticospinal tracts.de·cus·sa·ti·o, pl. de·cus·sa·ti·o·nes (dē'kŭ-sā'shē-ō, -ō'nēz), [TA] 1. In general, any crossing over or intersection of parts. 2. The intercrossing of two homonymous fiber bundles as each crosses over to the opposite side of the brain in the course of its ascent or descent through the brainstem or spinal cord. Synonym(s): decussation [L. (see decussate)] decussation (dĕk′ə-sā′shən, dē′kə-)n.1. A crossing in the shape of an X.2. Anatomy An X-shaped crossing, especially of nerves or bands of nerve fibers, connecting corresponding parts on opposite sides of the brain or spinal cord.de·cus·sa·ti·o, pl. decussationes (dē'kŭ-sā'shē-ō, -nēz) [TA] 1. In general, any crossing over or intersection of parts. 2. The intercrossing of two homonymous fiber bundles as each crosses over to the opposite side of the brain in the course of its ascent or descent through the brainstem or spinal cord.
Synonym(s): decussation. decussation A crossing so as to form an X, especially of tracts of nerve fibres.decussationCrossing of nerve fibres passing through the mid-sagittal plane of the central nervous system and connecting with structures on the opposite side. Partial decussation occurs at the optic chiasma.decussation
Related to decussation: decussation of pyramidsSynonyms for decussationnoun an intersection or crossing of two tracts in the form of the letter XSynonymsRelated Words- anatomical structure
- bodily structure
- body structure
- complex body part
- structure
- chiasma opticum
- optic chiasm
- optic chiasma
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