The sciatic nerve then passes beneath the piriformis muscle, and through the greater sciatic foramen, which is an opening formed by the pelvic bone, sacrospinous and sacrotuberous ligaments.

随后，坐从下方过梨状肌，并过坐大孔；坐大孔盆、骶棘韧带和骶结节韧带共同围成的通道。