Omae T, Inoue S, Saito O, Ishii H, Ishigaki S, Okuda T, Nakamura T, Akanishi M, Maruyama T
Nihon Hotetsu Shika Gakkai Zasshi. 1989 Apr;33(2):352-8. doi: 10.2186/jjps.33.352.
The purpose of this study is to reveal the relationship between the head position, and the neck and head muscles. At 4 head positions, the activities of masseter, anterior temporal, anterior digastric, sternocleidomastoid and trapezius muscle of ten normal subjects standing straight were investigated electromyographically with surface electrodes during voluntary maximal clenching in centric occlusion. Head positions were right tilting, left tilting, up-right and natural head position. The results obtained were as follows; 1. During head tilting, the activities of anterior digastric and sternocleidomastoid muscle on the tilting side were increased, the activities of masseter and trapezius muscle on the opposite side of the tilting side were increased, the activity of the anterior temporal muscle did not vary from the activity during up-right head position. 2. During natural head position, only the activity of sternocleidomastoid muscle on the natural tilting side was increased.
本研究的目的是揭示头部位置与颈部和头部肌肉之间的关系。在4种头部位置下，使用表面电极对10名直立的正常受试者在正中咬合时自愿最大程度紧咬过程中的咬肌、颞前肌、二腹肌前腹、胸锁乳突肌和斜方肌的活动进行了肌电图研究。头部位置分别为向右侧倾斜、向左侧倾斜、右上和自然头部位置。获得的结果如下：1. 在头部倾斜过程中，倾斜侧的二腹肌前腹和胸锁乳突肌的活动增加，倾斜侧对侧的咬肌和斜方肌的活动增加，颞前肌的活动与右上头部位置时的活动没有变化。2. 在自然头部位置时，仅自然倾斜侧的胸锁乳突肌的活动增加。
