Jaw reflexes evoked by mechanical stimulation of teeth in humans.
Jaw reflexes evoked by mechanical stimulation of teeth in humans.
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人类牙齿的机械刺激引起的下颌反射。
DOI：
10.1152/jn.1999.81.5.2156
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发表时间：
1999
影响因子：
2.5
通讯作者：
K. Türker
中科院分区：
文献类型：
--
作者：
J. Yang;K. Türker
人类牙齿的机械刺激引起的下颌反射。使用咬肌表面肌电图（SEMG）和咬合力来研究颌部肌肉对上切牙机械刺激的反射反应。随着缓慢上升的刺激，咬肌SEMG上获得的反射反应显示出三种不同的反射反应模式；单一兴奋、单一抑制和先抑制后兴奋。然而，同时记录的咬合力主要表现出一种反射反应模式，即净闭合力先减小后增加。快速上升的刺激也会在咬肌 SEMG 中引起几种不同的反射反应模式。然而，当分析同时记录的咬合力时，只有一种反射反应模式，即净闭合力下降。因此，咬肌的反射变化并不能很好地代表所有颌部肌肉对机械牙齿刺激的净反射反应。净响应最好用平均咬合力来表示。平均咬合力记录表明，当刺激力快速发展时，牙周反射可以降低咬合力，从而保护牙齿和支持组织免受破坏力的影响。它还可以增加咬合力；如果力的变化速度较慢，尤其是当初始咬合力较低时，这可能有助于将食物保留在牙齿之间。
Jaw reflexes evoked by mechanical stimulation of teeth in humans. The reflex response of jaw muscles to mechanical stimulation of an upper incisor tooth was investigated using the surface electromyogram (SEMG) of the masseter muscle and the bite force. With a slowly rising stimulus, the reflex response obtained on the masseter SEMG showed three different patterns of reflex responses; sole excitation, sole inhibition, and inhibition followed by excitation. Simultaneously recorded bite force, however, exhibited mainly one reflex response pattern, a decrease followed by an increase in the net closing force. A rapidly rising stimulus also induced several different patterns of reflex responses in the masseter SEMG. When the simultaneously recorded bite force was analyzed, however, there was only one reflex response pattern, a decrease in the net closing force. Therefore, the reflex change in the masseter muscle is not a good representative of the net reflex response of all jaw muscles to mechanical tooth stimulation. The net response is best expressed by the averaged bite force. The averaged bite force records showed that when the stimulus force was developing rapidly, the periodontal reflex could reduce the bite force and hence protect the teeth and supporting tissues from damaging forces. It also can increase the bite force; this might help keep food between the teeth if the change in force rate is slow, especially when the initial bite force is low.
有证据表明肌电图平均值的峰值有时可能是由运动神经元的抑制引起的。
影响因子：
2.5
作者：
Widmer,CG;Lund,JP
通讯作者：
Lund,JP