背阔肌

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	Spinous processes of vertebrae T7-L5, thoracolumbar fascia, iliac crest, inferior 3 or 4 ribs and inferior angle of scapula
终点	Floor 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	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
标识字符
拉丁文	Musculus latissimus dorsi
TA98	A04.3.01.006
TA2	2231
FMA	FMA:13357
《肌肉解剖学术语》

来源

• 《人体学习百科》，猫头鹰出版社，ISBN 957-9684-11-1

外部链接

• 解剖学(Anatomy)-肌肉(muscle)-Latissimus Dorsi Muscle(阔背肌) （页面存档备份，存于互联网档案馆）
• latissimus dorsi 于 GPnotebook
• Anatomy figure: 01:03-08 at Human Anatomy Online, SUNY Downstate Medical Center - "Superficial layer of the extrinsic muscles of the back."
• 横截面图像：pembody/body8a - 维也纳医科大学生物塑化实验室提供