Physiological Analysis of Correlation Between Rhythmical Jaw Movements and Monosynaptic Spinal Reflex in Humans

人类节律性下颌运动与单突触脊髓反射之间相关性的生理分析

• 批准号: 05454528
• 负责人: OHYAMA Takashi
• 金额: $ 4.54万
• 依托单位: TOKYO MEDICAL AND DENTAL UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05454528/
• 关键词: Soleus; H-reflex; Rhythmical; Jaw movements; Gum chewing; Facilitation; Tonic; 前腕屈筋群; 聴覚フィードバック; 咬合力; 促通量; 咀嚼リズム; 口腔機能; 運動機能; ヒト; H波; 脊髄単シナプス反射; 非相動性

We previously reported that human soleus H-reflex (S.H-R) was remarkably facilitated during teeth clenching, and that the magnitude of the facilitation increased with teeth clenching force. In this study, we investigated whether there was any modulation of S.H-R during rhythmical jaw movements with no teeth contacts (RJMs) and rhythmical gum chewing (RGC) . Experiments were carried out in 5 male volunteers (age : 22-27 years) with no stomatognathic dysfunction. The subjects were seated in a reclining armchair. Both legs were fixed with the knee and ankle joints at approximately 120ﾟ and 100ﾟ, respectively. Surface EMG was simultaneously recorded from the right soleus musle as well as the masseter and the anterior digastric muscles bilaterally. Electrical stimulation was applied to the tibial nerve at the popliteal fossa to elicit S.H-R. The subject performed self-paced RJMs and RGC.The peak-to-peak amplitude of the S.H-R during jaw movements was compared with that during maintaining the jaw at rest position. We found that (1) S.H-R was facilitated during RJMs and RGC (P<0.05, t-test) , and (2) there was no significant difference in the magnitude of the facilitation between the phase when the masseter muscle was active and that when the anterior digastric muscle was active (P>0.05, ANOVA) . It was concluded that (1) human soleus monosynaptic reflex is tonically facilitated during mastication, and (2) afferent impulses from intraoral mechanoreceptors are not indispensable for the facilitation. It is assumed that the oral motor activity exerts a strong influence on the bodily motor function in general.

我们以前报道过，人类比目鱼肌H反射（S.H-R）在咬牙过程中显著易化，且易化程度随着咬牙力的增加而增加。在这项研究中，我们调查是否有任何调制的S.H-R在有节奏的下颌运动无牙齿接触（RJM）和有节奏的咀嚼口香糖（RGC）。实验在5名无口颌功能障碍的男性志愿者（年龄：22-27岁）中进行。受试者坐在一把扶手躺椅上。将双腿分别固定在约120 mm和100 mm处的膝关节和踝关节上。同时记录右侧比目鱼肌以及双侧咬肌和二腹肌前肌的表面EMG。电刺激腘窝胫神经诱发S.H-R。受试者进行自起搏RJM和RGC，比较下颌运动时和保持下颌静止时S.H-R的峰-峰振幅。结果发现：（1）RJM和RGC时，S.H-R易化（P<0.05，t检验）;（2）咬肌活动时相和二腹肌前肌活动时相的易化程度无显著性差异（P>0.05，ANOVA）。结果表明：（1）人咀嚼运动时比目鱼肌单突触反射具有张力易化作用;（2）口内机械感受器的传入冲动不是咀嚼运动易化的必要条件。一般认为，口腔运动对身体运动功能有很大的影响。

项目成果

萩谷 昇: "リズミカルな顎運動時にみられる脊髄単シナプス反射の変調に関与する神経機構" 歯科基礎医学会雑誌. 35. 221 (1993)

Noboru Hagiya：“在有节奏的下巴运动期间观察到的脊髓单突触反射调节的神经机制”日本基础牙科医学会杂志 35. 221 (1993)。

HAGIYA,N.et al.: "MODULATION OF SPINAL MONOSYNAPTIC REFLEXES DURING RHYTHMICAL JAW MOVEMENTS.Jpn." J.Physiol.44, Suppl.1. 217 (1994)

HAGIYA,N.et al.：“节律性下颌运动期间脊柱单突触反射的调节。Jpn”。

萩谷 昇: "リズミカルな顎運動時の脊髄単シナプス反射の変調とその神経機構" 口腔病学会雑誌. 61. 21-38 (1994)

Noboru Hagiya：“有节奏的下巴运动期间脊髓单突触反射的调节及其神经机制”口腔医学会杂志 61. 21-38 (1994)。

HAGIYA,N.: "Modulation of Spinal Monosynaptic Reflexes During Rhythmical Jaw Movements and Its Central Neural Mechanisms" J.Stomatol.Soc.Jpn.61,1. 21-38 (1994)

HAGIYA,N.：“节律性下颌运动期间脊髓单突触反射的调节及其中枢神经机制”J.Stomatol.Soc.Jpn.61,1。

HAGIYA,N.et al.: "Central Neural Mechanisms Reponsible for Modulation of Spinal Monosynaptic Reflexes During Rhythmical Jaw Movements" Jpn.J.Oral Biol.35, Suppl. 221 (1993)

HAGIYA,N.et al.：“在有节奏的下颌运动期间负责调节脊髓单突触反射的中枢神经机制”Jpn.J.Oral Biol.35，增刊。