背闊肌
背闊肌（latissimus dorsi），是將手臂向下和下後拉的背部肌肉。這兩塊三角肌各有一闊端附著於脊椎和骨盆帶上，較窄的一端則在肩下延伸到肱骨。其拉丁語（及英語）名稱「latissimus dorsi」意為「背部之最寬闊者」。背闊肌可支撐舉過頭部的手臂，並將手臂從抬高的位置向下移動。如果你手臂用力向側面伸開，就會感到背闊肌的繃緊。
| 背闊肌 | |
|---|---|
 Latissimus dorsi originates from the mid to lower back | |
 肌肉相連上肢到脊椎骨 | |
| 细节 | |
| 起點 | Spinous processes of vertebrae T7-L5, thoracolumbar fascia, iliac crest, inferior 3 or 4 ribs and inferior angle of scapula |
| 終點 | Floor of intertubercular groove of the humerus |
| 动脉 | Thoracodorsal branch of the subscapular artery |
| 神经 | Thoracodorsal nerve (C6, C7, C8) |
| 相關動作 | Adducts, extends and internally rotates the arm when the insertion is moved towards the origin. When observing the muscle action of the origin towards the insertion, the lats are a very powerful rotator of the trunk. |
| 拮抗肌 | Deltoid and chest |
| 识别标示 | |
| 拉丁语 | Musculus latissimus dorsi |
| TA98 | A04.3.01.006 |
| TA2 | 2231 |
| FMA | FMA:13357 |
| 肌肉解剖学术语 | |
來源
- 《人體學習百科》，貓頭鷹出版社，ISBN 957-9684-11-1
外部連結
- 解剖學(Anatomy)-肌肉(muscle)-Latissimus Dorsi Muscle(背闊肌)
- latissimus dorsi 於 GPnotebook
- Anatomy figure: 01:03-08 at Human Anatomy Online, SUNY Downstate Medical Center - "Superficial layer of the extrinsic muscles of the back."
- 橫截面圖像：pembody/body8a - 維也納醫科大學生物塑化實驗室提供
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