Pudendal nerve supplying motor pa to external sphincter is derived from
Correct Answer: S2 - S3 roots
Description: The striated sphincter is innervated by the pudendal nerve from the S2 - S3 nerve roots. The neurons that innervate the urethral sphincter originate in the cord, in an area termed Onuf&;s nucleus. The autonomic nervous system also controls the IUS muscle because it is made of smooth muscle fibers.
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