Widmalm S E, Nemeth P A, Ash M M, Lillie J H
J Oral Rehabil. 1985 Jan;12(1):17-22. doi: 10.1111/j.1365-2842.1985.tb00616.x.
Dissection of seven cadavers showed that the platysma muscle may cover large parts of the masseter muscle. The platysma may thus be a significant source of artefact activity when recording the masseteric activity with surface electrodes. This is illustrated by a patient-case. The electrical activity of the platysma muscle was studied during jaw movements in normal, healthy subjects. Activity was regularly recorded during the latter half of large vertical jaw opening movements and, in five of the seven subjects, in the ipsilateral platysma muscle also during combined lateral-vertical jaw opening movements. The platysma may, therefore, in some individuals, have a functional role during the opening phase of chewing cycles when this has a marked lateral component.
对七具尸体的解剖显示，颈阔肌可能覆盖咬肌的大部分区域。因此，在用表面电极记录咬肌活动时，颈阔肌可能是伪迹活动的一个重要来源。这通过一个病例得到了说明。在正常健康受试者的下颌运动过程中，对颈阔肌的电活动进行了研究。在大的垂直开口运动的后半段，颈阔肌的活动经常被记录到，并且在七名受试者中的五名中，在联合侧方 - 垂直开口运动期间，同侧颈阔肌也有活动记录。因此，在某些个体中，当咀嚼周期的开口阶段有明显的侧方成分时，颈阔肌可能在该阶段发挥功能作用。
