The pudendal nerve supplies all perineal structures. Which anatomical canal does it traverse to reach the ischioanal fossa?

• A Obturator canal
• B Inguinal canal
• C Femoral canal
• D Alcock's (pudendal) canal ✓

Explanation

The pudendal nerve (S2-S4) exits the pelvis through the greater sciatic foramen below the piriformis, winds around the ischial spine, and re-enters through the lesser sciatic foramen. It then courses through Alcock's canal—a fascial tunnel on the lateral wall of the ischioanal fossa formed within the obturator fascia. A pudendal nerve block is administered at the ischial spine to anesthetize the perineum during childbirth.

Reference: BD Chaurasia's Human Anatomy, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.