Tsugane M H, Murakami G, Yasuda M
Department of Anatomy, Sapporo Medical University School of Medicine, Japan.
Okajimas Folia Anat Jpn. 1998 Aug;75(2-3):111-7. doi: 10.2535/ofaj1936.75.2-3_111.
Muscle slip composition and innervation was minutely examined in the case of the scalenus anterior muscle lying behind the 5th cervical nerve root. This minor change of topography deeply involved the muscle-nerve relationships of the entire muscle. Critical observations were as follows: (1) lower and unusual origins of the muscle; (2) irregular innervation with regard to the nerve elements and their approach to the muscle. This evidence suggested that abnormal migration, splitting and fusion of the muscle anlage had occurred during the development of the variant.
在第5颈神经根后方的前斜角肌病例中，对肌束组成和神经支配进行了细致检查。这种局部解剖结构的微小变化深刻影响了整块肌肉的肌肉-神经关系。关键观察结果如下：(1) 该肌肉起点较低且异常；(2) 神经成分及其与肌肉的接近方式存在不规则的神经支配。这一证据表明，在该变异体的发育过程中发生了肌原基的异常迁移、分裂和融合。
