Koda M, Kosugi K, Shibata S, Yamashita H
First Department of Anatomy, Jikei University School of Medicine, Tokyo, Japan.
Kaibogaku Zasshi. 1991 Jun;66(3):171-81.
An abnormal muscle, so-called M. cervico-humeralis, was found bilaterally in a 50-year-old Japanese male in a dissection practice at Jikei University in 1989. This is the third report of the cervico-humeral muscle in Japan, and the first case which occurred bilaterally. Both muscles were similar in shape, origin, course, and insertion. The flat and triangular-shaped muscle arose by tendinous slips from the transverse processes of the sixth and seventh cervical vertebrae (VC6 and VC7). These two tendons converged to form a single slip which passed through the brachial plexus. This single slip became a muscle running obliquely downward and laterally together with the brachial plexus and subclavian vessels to reach the medial surface of the humerus. The muscle inserted linearly by a thin flattened tendon into the lower end of the lesser tubercle and into the medial lip of the intertubercular sulcus of the humerus. The supplying nerve originated directly from the posterior cord of the brachial plexus in both muscles. The artery to the right cervico-humeral muscle arose from the axillary artery together with a branch to the subscapular muscle.
1989年，在东京慈惠会医科大学的解剖实习中，一名50岁的日本男性双侧发现了一块异常肌肉，即所谓的颈肱肌。这是日本关于颈肱肌的第三篇报道，也是首例双侧出现的病例。两块肌肉在形状、起点、走行和止点方面相似。这块扁平的三角形肌肉通过腱性束起自第六和第七颈椎（C6和C7）的横突。这两条肌腱汇合形成一条单独的束带，穿过臂丛神经。这条单独的束带与臂丛神经和锁骨下血管一起斜向下外侧走行，形成一块肌肉，到达肱骨内侧表面。该肌肉通过一条薄而扁平的肌腱呈线状插入肱骨小结节下端和肱骨结节间沟的内侧缘。两块肌肉的供应神经均直接发自臂丛后束。右侧颈肱肌的动脉与肩胛下肌的分支一起发自腋动脉。
