ヒト棘腕諸筋の筋線維構成について
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概要
- 論文の詳細を見る
In order to elucidate the functional characteristics of the spinohumeral muscles which consist of the serratus anterior, trapezius, rhomboideus major and minor and levator scapulae muscles, the following procedures were followed: muscle layer width was measured, the number of muscle fibers were determined and their size and weights were measured and compared with monkey muscles. The muscles examined were obtained from the right sides of 10 persons (five males and five females) . The sumples were injected and fixed with 10% formalin solution, and embedded in celloidin, sectioned into 20μ slices and stained with H. E. dye. The following results were obtained: 1) Muscle weight was the greatest in trapezius and the secondmost in serratus anterior, and were generally greater in males than in females. The width of muscle layers in the cranial portion of serratus anterior, intermediate portion of trapezius and cranial portion of rhomboideus major were greater than in the other muscle portions. 2) The number of muscle fibers per square mm. was largest in serratus anterior, the next in rhomboideus major and levator scapulae, and the smallest in the intermediate portion of the trapezius. They were generally larger in females than in males. 3) The mean size of muscle fibers was the greatest in the intermediate portion of the trapezius, the next in rhomboideus minor and levator scapulae, and the smallest in rhomboideus major and serratus anterior. The mean size of muscle fibers of serratus anterior and trapezius was greater in males than in females. 4) Compared with the crab-eating monkey, the muscle fiber organization in serratus anterior and rhomboideus were remarkably developed in the caudal portion of each muscle in monkey, but the development of these muscles in man was the same throughout all parts of the muscles. The developments in the intermediate portion of trapezius were excellent in man but poor in monkey.
- 昭和大学・昭和医学会の論文