a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm
双语例句
After posterior deltoid tendon transfer, a C6 tetraplegia caused by complete destruction of C6 level regained strength and the ability to extend the elbow one-year post injury. 摘要第六节颈髓完全损伤造成四肢全瘫的患者在受伤一年后，藉由后三角肌肌腱转移手术来重建手肘伸直动作及力量。
