Quantitative analysis of masticatory activity during unilateral mastication using muscle fMRI.
Quantitative analysis of masticatory activity during unilateral mastication using muscle fMRI.
复制标题
使用肌肉功能磁共振成像对单侧咀嚼过程中的咀嚼活动进行定量分析。
作者：
S. Yamaguchi;S. Itoh;Y. Watanabe;A. Tsuboi;Makoto Watanabe;Makoto Watanabe
目的
定量分析所有咀嚼肌的活动需要阐明口颌功能障碍的机制。肌电描记术可用于记录咀嚼肌的活动，但由于方法的限制，尚未完成对每一块咀嚼肌的整体活动的量化。在这项研究中，我们使用肌肉功能磁共振成像的整体活动的咬肌，内侧翼肌和外侧翼肌在单侧咀嚼口香糖的同时量化。
方法
7名健康男性志愿者参加了这项研究。我们评估了单侧咀嚼口香糖前后双侧咬肌、翼内肌和翼外肌的平均质子横向弛豫时间的变化，并量化了单侧咀嚼口香糖期间这些肌肉的整体活动。
结果
咀嚼5 min后，同侧咬肌的活动最强，其次是同侧翼内肌、对侧翼外肌和对侧咬肌。
结论
这些结果肯定了同侧咬肌的重要性，并定量地证明了同侧翼内肌和对侧翼外肌在单侧咀嚼中的重要贡献。
OBJECTIVE
Quantitative analysis of the activities of all masticatory muscles is required to elucidate the mechanism of stomatognathic dysfunction. Electromyography can be used to record the activity of masticatory muscles, but quantification of the overall activity of every masticatory muscle has not been accomplished because of methodological limitations. In this study, we used muscle functional magnetic resonance imaging for simultaneous quantification of the overall activities of the masseter, medial pterygoid and lateral pterygoid muscles during unilateral gum chewing.
METHODS
Seven healthy male volunteers participated in the study. We evaluated changes in the mean proton transverse relaxation time in the bilateral masseter, medial pterygoid and lateral pterygoid muscles before and after unilateral gum chewing, and to quantify the overall activity of these muscles simultaneously during unilateral gum chewing.
RESULTS
After 5 min of chewing, the activity of the ipsilateral masseter was highest among the six muscles, followed by the ipsilateral medial pterygoid, contralateral lateral pterygoid and contralateral masseter muscles.
CONCLUSION
These results affirm the importance of the ipsilateral masseter muscle and quantitatively demonstrate the important contribution of the ipsilateral medial pterygoid and contralateral lateral pterygoid muscles during unilateral mastication.
影响因子：
3.3
作者：
YUE, G;ALEXANDER, AL;ENOKA, RM
通讯作者：
ENOKA, RM
肌肉功能磁共振图像中的像素 T2 分布。
DOI：
10.1152/jappl.1999.87.6.2107
发表时间：
1999
期刊：
Journal of applied physiology (Bethesda, Md. : 1985)
影响因子：
--
作者：
Prior,BM;Foley,JM;Jayaraman,RC;Meyer,RA
通讯作者：
Meyer,RA