decussation of the pyramids


variants or decussation of pyramids
: pyramidal decussation
An acute right-sided corticospinal system lesion above the decussation of the pyramids or a left-sided lesion below the decussation but above the seventh dorsal cord segment will abolish the left abdominal reflexes.Robert T. Ross, How to Examine the Nervous System, 2006

Word History

First Known Use

1810, in the meaning defined above

Time Traveler
The first known use of decussation of the pyramids was in 1810

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Dictionary Entries Near decussation of the pyramids


decussation of the pyramids


Cite this Entry

“Decussation of the pyramids.” Dictionary, Merriam-Webster, Accessed 30 Sep. 2023.

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