Which space is formed by the sacrotuberous ligament?

Which space is formed by the sacrotuberous ligament?

• A. Lesser sciatic foramen
• B. Greater sciatic foramen
• C. Inguinal canal
• D. Obturator canal

Answer: (A)

The space created by the sacrotuberous ligament is the lesser sciatic foramen. The sacrotuberous ligament runs from the sacrum to the ischial tuberosity, and together with the sacrospinous ligament it divides the region around the sciatic notch into two foramina. The lesser sciatic foramen lies below the sacrospinous ligament and is bounded in part by the sacrotuberous ligament. This arrangement allows structures such as the tendon of obturator internus and the pudendal vessels/nerve to pass in and out of the pelvis. In contrast, the greater sciatic foramen is the larger opening above that region, while the inguinal canal and obturator canal are formed by other boundaries and not by this ligamental pairing.

The space created by the sacrotuberous ligament is the lesser sciatic foramen. The sacrotuberous ligament runs from the sacrum to the ischial tuberosity, and together with the sacrospinous ligament it divides the region around the sciatic notch into two foramina. The lesser sciatic foramen lies below the sacrospinous ligament and is bounded in part by the sacrotuberous ligament. This arrangement allows structures such as the tendon of obturator internus and the pudendal vessels/nerve to pass in and out of the pelvis. In contrast, the greater sciatic foramen is the larger opening above that region, while the inguinal canal and obturator canal are formed by other boundaries and not by this ligamental pairing.