背闊肌

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背闊肌
1119 Muscles that Move the Humerus b.png
Latissimus dorsi originates from the mid to lower back
Latissimus dorsi.PNG
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)
相關動作英语KinesiologyAdducts, 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.
拮抗肌英语Antagonist (muscle)Deltoid and chest
识别标示
拉丁语Musculus latissimus dorsi
TA98A04.3.01.006
TA22231
FMAFMA:13357
肌肉解剖学术语英语Anatomical terms of muscle

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。

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