Decussation
Decussation
Decussation (pronounced: deh-koo-SAY-shun) is a term used in anatomy and biology to describe the process where fibers, especially in the brain and nervous system, cross from one side to the other. The term is derived from the Latin word decussis, meaning "a cross in the shape of the Roman numeral ten (X)".
Etymology
The term "decussation" comes from the Latin decussis, which refers to the number ten in Roman numerals, represented as "X". This is due to the crossing shape that the fibers make, which resembles an "X".
Related Terms
- Commissure: A bundle of nerve fibers that cross the midline at their level of origin or entry.
- Chiasma: A point of crossing or intersection of two tracts, such as the optic chiasma.
- Pyramidal decussation: The crossing of the nerve fibers in the medulla oblongata.
- Decussation of superior cerebellar peduncle: The crossing of fibers in the cerebellum.
See Also
References
- Neuroanatomy: An Atlas of Structures, Sections, and Systems
- Gray's Anatomy: The Anatomical Basis of Clinical Practice
External links
- Medical encyclopedia article on Decussation
- Wikipedia's article - Decussation
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