稀なる肩甲鎖骨筋 (M. Omoclavicularis) の一例に就て

概要

論文の詳細を見る
Abnormity of m. omoclavicularis is known sometimes to occur. we have encountered in 57-year-old corpse examined in the course of dissection practice of the year 1954 a rare case of anomaly involving m. subclavius where socalled m. omoclavicularis made its appearance in place of m. subclavius. The corpse lacked m. subclavius on the left side and there was observed a muscle having its origin directly before the origin of left m. omohyoideus. The muscle arose with origin broader than that of m. omohyoideus, and took rectangular direction against m. supraspinam which lay in direct background to run down-and inward until it made cantact with os. clavius obliquely. The muscle then proceeded along the lower surface of the bone, and gradually diminishing its size and eventually being converted into a ligament it attached to the inside point one third the length of os. clavius. This constitutes m. omoclavicularis. The size was thin and small, resembling to a elongated equilateral triangle with the base directed toward the muscle origin. The unilateral absence of m. subclavius accompanied with the occurrence of anomalous muscle such as m. omoclavius would seem to be one of the rarest instances ever observed, and the author is of the opinion that the anomalous muscle may be the substitute for the missing m. subclavius.
九州歯科学会の論文
1957-09-30