大圆肌位于小圆肌的下侧,其下缘为背阔肌上缘遮盖,整个肌肉呈柱状,起于肩胛骨下角背面,肌束向外上方集中,止于肱骨小结嵴。起止点:位于小圆肌的下侧,其下缘为背阔肌上缘遮盖,整个肌肉呈柱状,起于肩胛骨下角背面,肌束向外上方集中,止于肱骨小结嵴。作用:肩关节旋内、肩关节内收、肩关节后伸(在无阻力的运动中,不表现出电的活动,但在做抗阻力动作时,它是原动肌),由于该肌对手臂的作用同背阔肌很相象,所以,被称为“背阔肌的小助手”。
腋神经入肌部位在大圆肌下缘以上发出。
The entering sites of axillaris nerve are all above the distal rim of the larger round muscle.
目的:研究大圆肌的形态特点及血管神经蒂特点。
Objective: To study the morphological character of teres major muscle and its pedicel of vessel and nerve.
方法:解剖12例尸体的上肢带骨,分离出背阔肌、大圆肌、臂丛神经后束及分支。
METHODS: Twelve cadaveric shoulder girdles were dissected, and the latissimus dorsi, the teres major, and the posterior cord of the brachial plexus and its branches were identified.
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