斜方肌抵止部的异常

ON THE VARIATIONS OF INSERTION OF M.TRAPEZIUS

著者在调查国人(东北及华北一带汉族)体质构造工作中,常常遇到斜方肌抵止部异常的例子,即斜方肌前上缘的一部分肌(纤维)束到锁骨抵止部附近分离出来,向前方特别是向胸销乳突肌锁骨起始部的外侧方,到达锁骨而抵止於不同的部位,并形成所谓腱弓。著者获得了这个详细观察的机会,兹将其大要报告如下。

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.