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Medical Definition of Onuf's nucleus
1. Small somatic motor neurons in the ventral horn of the spinal cord at sacral 2 level which innervate the vesicorectal sphincters, that is, the external anal and the urethral sphincter; O.'s nucleus has been identified in the cat, dog, and humans. (05 Mar 2000)
Lexicographical Neighbors of Onuf's Nucleus
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