Modulation of the amplitude of the digastric jaw opening reflex during the masticatory cycle
Modulation of the amplitude of the digastric jaw opening reflex during the masticatory cycle
复制标题
咀嚼周期中二腹肌张颌反射幅度的调节
DOI：
10.1016/0306-4522(81)90247-5
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发表时间：
1981
期刊：
影响因子：
3.3
通讯作者：
S. Rossignol
中科院分区：
文献类型：
--
作者：
J. P. Lund;S. Rossignol
在轻度麻醉的兔子中，在由口腔刺激引起的咀嚼之前和咀嚼期间引发张颌反射。咀嚼过程中发生的二腹肌电反射反应的平均幅度低于运动前记录的对照反应。除了咀嚼过程中反射敏感性普遍降低之外，还发现振幅受到阶段性调节。最大的反应发生在颌部闭合期间，此时口腔软组织和牙周韧带最有可能被颌部闭合肌肉中产生的重力损坏。当二腹肌正常不活动时，闭合期间反射反应的增加很可能不是由运动神经元兴奋性控制，而是由前运动神经元机制控制。
The jaw opening reflex was elicited in lightly anesthetized rabbits prior to and during mastication induced by oral stimulation. The mean amplitude of the digastric electromyographic reflex responses occurring during chewing were lower than control responses recorded prior to movement. In addition to this general reduction in reflex sensitivity during mastication, the amplitude was found to be phasically modulated. The largest responses occurred during jaw closing, when the oral soft tissues and periodontal ligament are most likely to be damaged by the heavy forces generated in the jaw closing muscles.It is likely that the increase in the reflex response during closure, when the digastric muscle is normally inactive, is not controlled by motoneuron excitability, but by premotoneuron mechanisms.