The influence of the sympathetic nerve system on the differentiation and pain of the masticatory muscles

复发性慢性口面部疼痛患者的数量正在增加。慢性口面部疼痛患者的主要病理生理是肌肉疼痛。本实验研究了咀嚼肌交感神经系统的活动和软食的影响与肌纤维分化和代谢活动的关系。动物实验表明，交感神经系统可能影响咀嚼肌纤维的分化和代谢活动。此外，交感神经切除侧的肌纤维坏死可能与肌营养不良症等疾病的发生有关。另一种生长兔的动物实验表明，软质饮食习惯也可能有助于咀嚼肌纤维的分化或代谢活动。临床研究表明，交感神经系统的兴奋和抑制可影响咀嚼肌的压痛阈值。肌肉压痛阈值变化的程度可能取决于口面部疼痛。

The number of the patient with recurrent chronic orofacial pain is increasing. The main pathophysiology of the patients with chronic orofacial pain is muscle pain. We studied the relationships between the activities of sympathetic nerve system or influence of soft-diet and the differentiation or metabolic activities of the muscle fibers in the masticatory muscles. The animal experiences of the rabbit indicated that sympathetic nerve system may affect the differentiation or metabolic activities of the muscle fibers in the masticatory muscles. Moreover, necrosis of the muscle fibers of the side of sympathectomy might indicate the correlation with occurrence of the diseases such as muscular dystrophy. Another animal experience with growing rabbit indicated that soft-diet habit may also contribute to the differentiation or metabolic activities of the muscle fibers in the masticatory muscles. Clinical studies indicated that stimulation and inhibition of the sympathetic nerve system may affect the threshold of the pressure pain of the masticatory muscles. The degrees of the change of the threshold of the pressure pain of the muscles may depend on the pain of the orofacial region.