前鋸筋の機能解剖学的研究

概要

論文の詳細を見る
To clarify the anatomy of the long thoracic nerve (LTN) and functional anatomy of 3 parts of the serratus anterior muscle (SA) from innervations and the shape of each fiber. We collected the 10 shoulders of 5 cadavers (3 males and 2 females,average age 82,4 years old). The upper, middle, and lower parts of SA were classified according to the Eislers definition. We observed which components from C4, C5, C6, and C7 innervated each part of the SA. The upper part was mainly innervated by C5 fiber and also C4, C6, or C7 fibers connected to the parts in 8 of 10 shoulders. The long thoracic nerve consisted of C6 and 7 fibers innervated middle and lower parts. The cross section area of the upper part was wider than those of other parts, and the upper part ran in the direction of the anterior compared to that of the middle part. The upper part of SA may be worked as the center of the scapula in an up and downward rotation. Degenerative change or sprain of cervical spine and direct trauma to the medial scalenus muscle may have caused damage of LTN and then dysfunction of the SA.
日本肩関節学会の論文