Influence of human jaw movement on cerebral blood flow
Influence of human jaw movement on cerebral blood flow
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DOI：
10.1177/154405910708600110
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发表时间：
2007-01-01
影响因子：
7.6
通讯作者：
Nokubi, T.
中科院分区：
文献类型：
--
作者：
Hasegawa, Y.;Ono, T.;Nokubi, T.
颌骨运动引起的脑血流量的时间变化还有待研究。为了评估下颌运动中肌肉收缩的方式和强度对任务引起的脑血流变化的影响，我们对健康志愿者在咬合、咀嚼口香糖和敲击牙齿的过程中进行了双侧经颅多普勒超声检查。随机效应模型分析显示，与之前的休息期相比，咬合(高肌肉活动)和嚼口香糖(中等肌肉活动)时大脑中动脉血流速度显著增加；然而，在敲牙(低肌肉活动)时没有检测到这种增加。咬合时咬肌剧烈等长收缩时，工作侧脑血流量较大。这些结果表明，下颌运动过程中任务诱发的脑血流量变化受肌肉收缩引起的外周循环变化的影响。
Temporal changes in cerebral blood flow induced by jaw movement have yet to be investigated. To assess the influence of pattern and intensity of muscle contraction during jaw movement on task-induced change in cerebral blood flow, we performed bilateral transcranial Doppler ultrasound examination during clenching, gum chewing, and tooth tapping in healthy volunteers. A random-effects model analysis revealed a significant increase in middle cerebral artery blood flow velocity during clenching (high muscle activity) and gum chewing (moderate muscle activity), compared with the preceding rest period; however, such an increase was not detected during tooth tapping (low muscle activity). Cerebral blood flow was greater on the working side during the intensive isometric contraction of the masseter muscle in clenching. These results suggest that task-induced change in cerebral blood flow during jaw movement is influenced by the change in peripheral circulation evoked by muscle contraction.