Effects of noxious stimulus upon interaction between autonomic nervous system and oral function.

1.目的：为了解口面部疼痛的生理机制，应考虑交感神经系统和躯体神经系统之间的相互作用。本研究旨在探讨口面部伤害性刺激对自主神经系统的影响.方法：生理测量包括心电图、颞肌/咬肌血流动力学和血压.结果：比较了稳定静息状态下和疼痛刺激任务时的平均值。颞肌0_2 Hb、cHb在疼痛刺激时显著升高（P<0.05），停止疼痛刺激后继续升高。在停止疼痛刺激后，02 Hb和chb分别恢复到静息水平240和330 μ m。对于HHb TOI，尚未发现显著变化。咬肌02 Hb、cHb显著升高（p<0.05）。在停止疼痛刺激后继续增加。02 Hb和cHb分别在疼痛停止后120和270秒恢复到静息水平。至于HHb TOI，未确定显著变化增加。自主神经系统的变化，没有确定的显着增加。咀嚼运动前后自主神经系统的变化，Lo/Hi和Hi/TPW无明显变化.结论：伤害性刺激与咀嚼肌血流动力学变化密切相关。

1. Aim :In order to understand physiological mechanism for oro-facial pain, interaction between sympathetic and somatic nervous systems should be considered. This study was aimed to investigate the effect of noxious stimulus on oro-facial region on the autonomic nervous system.2. Methods :The physiological measurement includes electro-cardiogram, hemo-dynamics of temporalis/masseter muscles and blood pressure.3. Results :The comparisons have been made between mean values during stable rest condition and during pain stimulus task. The parameters include hemodynamics for the temporalis/masseter muscles, heart rate, Lo/Hi, Hi/TDW and blood pressure.As regard to temporalis muscle, the 02Hb and cHb were significantly increased during pain stimulus (p<0.05) The increase continued after cessation of the pain stimulus. The 02Hb and chb were recovered to the resting level 240 and 330 see after cessation of the pain stimulus, respectively. For the HHb TOI, the significant change has not been identified. With respect to the masseter muscle, 02Hb and cHb were significan tly increased (p<0.05). The increase continued after cessation of pain stimulus. The 02Hb and cHb were recovered to the resting level 120 and 270 sec after cessation of the pain, respectively. As for the HHb TOI, no significant changes increase was determined. The changes in autonomic nervous system, no significant increase was determined. The changes in the autonomic nervous system during and after masticatory jaw motion, no significant changes in the Lo/Hi and Hi/TPW were identified.4. Conclusions :It has been elucidated that the noxious stimulus related significantly to the hemo-dynamics of the masticatory muscle.