Matsuda Shinpei, Yamaguchi Taihiko, Mikami Saki, Okada Kazuki, Gotouda Akihito, Sano Kazuo
a Division of Dentistry and Oral Surgery, Faculty of Medical Sciences, Department of Sensory and Locomotor Medicine , University of Fukui , Fukui , Japan.
b Division of Oral Functional Science, Department of Crown and Bridge Prosthodontics , Graduate School of Dental Medicine, Hokkaido University , Hokkaido , Japan.
Cranio. 2016 Jul;34(4):234-41. doi: 10.1080/08869634.2015.1106807. Epub 2016 Mar 22.
The aim of this study was to elucidate characteristics of rhythmic masticatory muscle activity (RMMA) during sleep by comparing masseteric EMG (electromyogram) activities of RMMA with gum chewing.
The parts of five or more consecutive phasic bursts in RMMA of 23 bruxers were analyzed. Wilcoxon signed-rank test for matched pairs and Spearman's correlation coefficient by the rank test were used for statistical analysis.
Root mean square value of RMMA phasic burst was smaller than that during gum chewing, but correlates to that of gum chewing. The cycle of RMMA was longer than that of gum chewing due to the longer burst duration of RMMA, and variation in the cycles of RMMA was wider.
These findings suggest that the longer but smaller EMG burst in comparison with gum chewing is one of the characteristics of RMMA. The relation between size of RMMA phasic bursts and gum chewing is also suggested.
本研究旨在通过比较磨牙症患者咀嚼肌节律性活动（RMMA）的咬肌肌电图（EMG）活动与口香糖咀嚼时的情况，阐明睡眠期间RMMA的特征。
分析了23名磨牙症患者RMMA中连续五个或更多个相位爆发的部分。采用配对的Wilcoxon符号秩检验和秩检验的Spearman相关系数进行统计分析。
RMMA相位爆发的均方根值小于口香糖咀嚼时的均方根值，但与口香糖咀嚼时的均方根值相关。由于RMMA的爆发持续时间较长，RMMA的周期比口香糖咀嚼的周期长，且RMMA周期的变化更广泛。
这些发现表明，与口香糖咀嚼相比，RMMA中较长但较小的EMG爆发是其特征之一。还表明了RMMA相位爆发大小与口香糖咀嚼之间的关系。
