Through the greater sciatic foramen
This foramen is surrounded by the following structures:
- Sacrospinous ligament :Connects the sacrum and coccyx to the ischial spine
- Sacrotuberous ligament:Connects the inferior posterior iliac spine, the inferior lateral border of the sacrum, and the coccyx to the ischial tuberosity
- Greater sciatic notch
- The piriformis muscle passes through here. The piriformis muscle divides the notch into the suprapiriform foramen and the infrapiriform foramen.
- The superior gluteal artery, vein, and nerve pass through the suprapiriform foramen.
- The sciatic nerve; inferior gluteal artery, vein, and nerve; internal pudendal artery and vein; pudendal nerve; and posterior cutaneous nerve of the thigh pass through the infrapisiform foramen.