The piriformis muscle and sciatic nerve are very close to each other, so, if the piriformis muscle gets irritated, it can cause muscle inflammation or muscle spasms that can compress the sciatic nerve.

梨状肌和坐骨神经非常接近，所以，如果梨状肌受到刺激，会导致肌肉炎症或痉挛，从而压迫坐骨神经。

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。