肩袖(英语:rotator cuff),又称为肩旋转袖、旋转肌袖、旋转袖、旋转肌,是稳定肩膀且允许肩关节广泛活动的一群肌肉及其肌腱。肩袖包覆在肩关节周围,由棘上肌、棘下肌、小圆肌、肩胛下肌及其肌腱共同组成;这些肌腱附着于肱骨大小结节,状似袖口而得名。
肩袖的功能是将肱骨头压向肩盂而保持肱骨头与肩盂相接触,形成单一的盂肱关节旋转中心,进而稳定肩关节;且同时肩袖的肌肉收缩可旋转或移动肱骨头,让肩关节做内旋、外旋动作,并协同三角肌来外展肩关节。
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