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小的胸大肌

 
,醫學編輯
最近審查:23.04.2024
 
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小胸肌(m。胸小肌)扁平,三角形,位於大胸肌後面。肌肉從II-V肋骨開始,靠近它們的前端。向上和橫向向上,它通過短的腱連接到肩胛骨的喙突。

功能:向前傾斜刀片。隨著肩帶的加強,他舉起了肋骨,有助於擴大胸部。

神經支配:內側和外側胸神經(Ⅶ-Th1)。

血液供應:胸動脈,胸廓內動脈的前肋間分支。

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