The pectoralis minor muscle contracts in a closed-chain fashion to lift the lower ribs and open the chest.
胸小肌向下巴的方向收缩，上提肋骨下缘，打开胸廓。
Methods: Modified radical mastectomy of retaining pectoralis major and pectoralis minor muscle was applied to 63 patients, aided by chemotherapy after operation.
方法：对63例乳腺癌患者实施保留胸大、小肌改良根治术，术后辅以化疗。
Objective: To study the muscle spindle morphology, distribution and their relationship with the fiber-types in human pectoralis major and pectoralis minor.
目的：探讨人胸大肌、胸小肌肌梭的形态、分布及其与梭外肌纤维型的关系。
Main chest muscle pectoralis major, minor muscle and intercostal muscles.
深层的肌肉较多，主要有骶棘肌。
Main chest muscle pectoralis major, minor muscle and intercostal muscles.
深层的肌肉较多，主要有骶棘肌。
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