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The relationship between electromyograph and energy metabolism in masseter mucles of TMD patients

TMD患者咬肌肌电图与能量代谢的关系

基本信息

批准号：
06671939
负责人：
YAMAGUCHI Taihiko
金额：
$ 1.34万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

The purpose of this study was to verify the relationship between electromyograph (EMG) and energy metabolism in masseter mucles of TMD patients. The EMG data were compared with energy metabolism data analyzed by 31P-MRS (Magnetic Resonance Spectroscopy).The results were as follows ;1. Before and after fatigue-loading, the power spectral analysis of EMG showed the similar tendency to 31P-MRS analysis. It was suggested that the power spectral analysis of EMG might reveal the state of muscle fatigue and energy metabolism in masseter muscle.2. In the chewing rhythm analysis by EMG,the mean of CV (coefficiency of variation) in TMD patients suffering from pain and contracture of masseter muscles was higher than that in normal subjects. But there was little correlation between the result of CV analysis and that of 31P-MRS analysis.3. The mean of interval/cycle time ratio in TMD patients suffering from pain and contracture of masseter muscles was higher than that in normal subjects. The result of interval/cycle time analysis was correlative with the result of energy metabolism analysis by 31P-MRS.4. In one TMD patient, 31P-MRS analysis showed improvement of muscle fatigue after treatments, but interval/cycle time ratio was not changed evidently. In this patient, the ratio before treatment was almost in nomal range, because the border of burst was not obvious and the duration of burst was enlarged abnomally. After treatment the border of burst became clear and the burst shape became normal. This results suggest that the analysis of interval/cycle time ratio must be done together with the burst shape analysis.

本研究旨在探讨颞下颌关节紊乱病（TMD）患者咬肌肌电（EMG）与能量代谢的关系。将肌电图数据与31 P-MRS（磁共振波谱）分析的能量代谢数据进行比较。疲劳负荷前后肌电功率谱分析结果与~（31）P-MRS分析结果具有相似的趋势。提示肌电信号的功率谱分析可以揭示咬肌的疲劳状态和能量代谢状况.在咀嚼节律肌电图分析中，伴有咀嚼肌疼痛和挛缩的TMD患者的变异系数（CV）均值高于正常人。但CV分析结果与31 P-MRS分析结果相关性不高.伴有咀嚼肌疼痛和挛缩的TMD患者的间期/周期时间比值均值高于正常人。31 P-MRS能量代谢分析结果与间期/周期时间分析结果相关。1例TMD患者治疗后31 P-MRS显示肌肉疲劳改善，但间期/周期时间比值无明显变化。该例患者治疗前的比值几乎在正常范围内，原因是阵发边缘不明显，阵发持续时间异常延长。经治疗后，爆裂边缘清晰，爆裂形态正常。这一结果表明，间隔/周期时间比的分析必须与突发形状分析一起进行。