阔背肌(latissimus dorsi),是将手臂向下和下后拉的背部肌肉。这两块三角肌各有一阔端附著于脊椎和骨盆带上,较窄的一端则在肩下延伸到肱骨。其拉丁语(及英语)名称“latissimus dorsi”意为“背部之最宽阔者”。阔背肌可支撑举过头部的手臂,并将手臂从抬高的位置向下移动。如果你手臂用力向侧面伸开,就会感到阔背肌的绷紧。

阔背肌
Latissimus dorsi originates from the mid to lower back
肌肉相连上肢到脊椎骨
基本信息
起点英语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
终点英语Anatomical terms of muscle#Insertion_and_originFloor of intertubercular groove of the humerus
动脉Thoracodorsal branch of the subscapular artery
神经Thoracodorsal nerve (C6, C7, C8)
相关动作英语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
标识字符
拉丁文Musculus latissimus dorsi
TA98A04.3.01.006
TA22231
FMAFMA:13357
肌肉解剖学术语英语Anatomical terms of muscle

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