<prompt> Pudendal nerve root value:L5 S1 rootsS1 S2 rootsL2 L3 rootsS2 S3S4 roots  <response>: Pudendal nerve arises from the sacral plexus in the pelvis S2- S4. Pudendal nerve is nerve of perineum. External urethral sphincter supplied by pudendal nerve. 