Image Based Question-65108

All of the following statements are true regarding the nerve (marked with yellow) in this image except:

A. It is derived from S2,3,4.

B. It is both sensory and motor.

C. It leaves the pelvis through the lesser sciatic foramen.

D. It leaves through lesser sciatic foramen and enter pudendal canal.

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Correct Answer » C Explanation

Ans.C It leaves the pelvis through the lesser sciatic foramen

yellow color nerve is Pudendal nerve

• Pudendal nerve leaves the pelvis, to enter the gluteal region, by passing through the lower part of the greater sciatic foramen.

• Pudendal nerve leaves the gluteal region by passing through the lesser sciatic foramen and enters the pudendal canal, and by means of its branches supplies the external anal sphincter and muscles and skin of the perineum.

• The pudendal nerve originates from the lumbo-sacral plexus (L4-S4). It consists of both sensory fibers (80%) and motor fibers (20%).