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背闊肌

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闊背肌
Latissimus dorsi originates from the mid to lower back
肌肉相連上肢到脊椎骨
基本資訊
起點英語Anatomical terms of muscle#Insertion_and_originSpinous processes of vertebrae T7-L5, thoracolumbar fascia, iliac crest, inferior 3 or 4 ribs and inferior angle of scapula
終點英語Anatomical terms of muscle#Insertion_and_originFloor of intertubercular groove of the humerus
動脈Thoracodorsal branch of the subscapular artery
神經Thoracodorsal nerve (C6, C7, C8)
相關動作英語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.
拮抗肌英語Antagonist (muscle)Deltoid and chest
標識字符
拉丁文Musculus latissimus dorsi
TA98A04.3.01.006
TA22231
FMAFMA:13357
肌肉解剖學術語英語Anatomical terms of muscle

闊背肌(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」。闊背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,就會感到闊背肌的繃緊。

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