Phonomyogram and electromyogram relationships with isometric force reinvestigated in man
Phonomyogram and electromyogram relationships with isometric force reinvestigated in man
复制标题
重新研究人体肌音图和肌电图与等长力的关系
DOI：
10.1007/bf00839159
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
J. C. Cnockaert
中科院分区：
文献类型：
--
作者：
B. Maton;M. Petitjean;J. C. Cnockaert
收缩的肌肉发出的声音可以很容易地用麦克风记录下来。为了确定是否可以使用一个phonomyogram（PMG）来监测肌肉力量，进行了比较之间的同步记录的PMG和单极肌电图（EMG）从等距收缩肱二头肌和外部屈曲力。单极电极和麦克风的位置被确定的运动点。无论记录部位如何，PMG振幅与EMG振幅成正比，且均与肌力呈二次曲线关系。PMG频谱随力的变化与EMG相似，即平均功率频率增加到约30%最大自主收缩，然后达到平台。尽管变异性略高，PMG被证明是一个有效的指标的肌肉等长力量。在相同的力，PMG和EMG的振幅都低于俯卧位的手。这一结果表明，肱二头肌肌肉活动的选择性记录。
Contracting muscle generates sounds which can be recorded easily by means of a microphone. To determine if a phonomyogram (PMG) can be used to monitor muscle force, a comparison was made between simultaneous recordings of PMG and monopolar electromyogram (EMG) from the isometrically contracting biceps brachii muscle and the external flexion force. Locations of the monopolar electrode and microphone were identified in relation to the motor point. Whatever the recording site, PMG amplitude was proportional to EMG amplitude and both showed a quadratic relationship to muscle force. Changes in the PMG spectrum with force were similar to those in EMG, i.e. the mean power frequency increased up to about 30% maximal voluntary contraction and then reached a plateau. De spite a slightly higher variability, PMG was shown to be a valid index of muscular isometric force. At the same force, the amplitude of both PMG and EMG was lower in the prone than in the supine position of the hand. This result indicated a selective recording of biceps brachii muscle activity.