The piriformis muscles, strong external rotators of the thigh, attach to the sacrum and the femur. Stretching them can increase S-I joint instability.
梨状肌是附着在骶骨和大腿骨上的强大的回旋肌，对他们的拉伸有损于骶髂关节的稳定性。
For example, tense lower-back muscles can contribute to piriformis syndrome which in turn can cause inflamation of the sciatic nerve.
腰背部肌肉长期紧张可以导致梨状肌症候群，梨状肌的问题反过来又可以导致坐骨神经炎。
Objective changes of repairment of dysfunction of nerves of pharyngeal muscles, laryngeal muscles, epiglottic muscles and piriformis were observed.
观察咽缩肌、会厌肌等神经功能紊乱修复的客观变化。
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