ON THE VARIATIONS OF INSERTION OF M. TRAPEZIUS / 解剖学报

ABSTRACT

Variations in the insertion of the M. trapezius in 50 Chinese female bodieswere studied and analyzed. It was found that the presence of the anomalousinsertion of this muscle was 22?5.86% in terms of body or 12?3.25% in termsof side. The anomalous insertion consisted of separation of a part of the mus-cular fibers which are inserted at some distance from the normal attachment. Five types have been classified according to the manner of attachmentby some authors. However, the present author failed to find "Type 3" (joiningthe M. sterno-cleido-mastoideus without clavicular insertion) in his study. The probable cause of this anomaly was discussed from the point of viewof its development.