Functional Analysis of the human masticatory muscles by means of the muscular sound measured with the displacement sensor, and relation to the dentofacial morphology

通过位移传感器测量的肌肉声音来分析人体咀嚼肌的功能及其与牙面部形态的关系

基本信息

批准号：
12672002
负责人：
NAKATA Shunsuke
金额：
$ 2.37万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

The purpose of the present study is estimate the mechanism of muscle contraction and the condition of the muscle fatigue by means of the muscular sound (MS), the microvibration of the muscle.First, the characteristics of displacement-output voltage of the Amorphous Magnetic Sensor picked the MS up were measured. Secondly, the MS and electromyogram (EMG) of the right masseter muscle in 16 healthy male were recorded, when the eight different contraction forces (%MVC) were exerted and four %MVC after fatigue. And the amplitudes (Amp) and frequencies (Freq) of both records were analyzed. The following is the results.1. On the range of 3.0±0.1mm, the relation of displacement-output voltage of this sensor is linear.2. The Amp of the MS has been increased until 20 %MVC. Beyond its %MVC, it has been decreased.3. As the %MVC has been bigger, the power in the higher Freq band of MS has increased. However, the median Freq of power spectrum of the MS has not changed.4. After fatigue, the Amp of EMG recordings have been increased, but those of the MS have not been changed.5. The conversion efficiency (the Amp of MS / the Amp of EMG) has tended to decrease in 10 and 20 %MVC after fatigue.6. After fatigue, it became small that the powers of the higher Freq band of MS tend to increase.It is suggested that the recordings and analysis of MS is useful diagnostic tool in clinical dentistry, because the assessment of MS is get the more information of the muscle condition than EMG and muscle power.

本研究的目的是通过肌肉疲劳（MS），肌肉的微反映，首先测量了肌肉的微反应，估计肌肉收缩的机制和肌肉疲劳的状况。其次，在执行八个不同的收缩力（％MVC）并在疲劳后执行八个不同的收缩力（％MVC）时，记录了16个健康男性的右按摩肌的MS和肌电图（EMG）。分析了两种记录的放大器（AMP）和频率（FREQ）。以下是结果1。在3.0±0.1mm的范围内，该传感器的位移输出电压的关系是线性的。2。 MS的AMP已增加，直到MVC 20％。超过其％MVC，它得到了改进。3。由于％MVC较大，因此MS较高的FREQ频段的功率增加了。但是，MS的功率频谱中位数尚未改变。4。疲劳后，EMG记录的放大器已增加，但MS的放大器尚未更改。5。疲劳后，转化效率（MS / EMG AMP的AMP）在10％和20％的MVC中趋于降低。6。疲劳后，MS较高的FREQ带的力量倾向于增加，这变得很小。这表明MS的记录和分析是临床牙科中有用的诊断工具，因为MS的评估比EMG和肌肉力量获得了更多的肌肉状况信息。