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，坐骨神经从下方经过梨状肌，并穿过坐骨大孔；坐骨大孔是由骨盆、骶棘韧带和骶结节韧带共同围成的通道。