Pudendal nerve

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The pudendal nerve is a somatic nerve of the pelvis, running from S2-S4. It leaves the pelvic cavity through the greater sciatic foramen, together with the accompanying internal pudendal vessels. Then, the pudendal nerve enters the perineum via the lesser sciatic foramen. It is the main motor and sensory nerve of the perineum, and may give motor branches to the pelvic diaphragm

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