School of Mechatronic Engineering, Universiti Malaysia Perlis (UniMAP), 02600 Arau, Perlis, Malaysia.
Centre for Telecommunication Research & Innovation, Fakulti Kejuruteraan Elektronik & Kejuruteraan Komputer, Universiti Teknikal Malaysia Melaka (UTeM), 76100 Durian Tunggal, Melaka, Malaysia.
J Musculoskelet Neuronal Interact. 2020 Jun 1;20(2):194-205.
To analyse the influence of muscle fibre axis on the degree of crosstalk in mechanomyographic (MMG) signals during sustained isometric forearm flexion, pronation and supination exercises performed at 80% maximum voluntary contraction (MVC) at an elbow joint angle of 90°.
MMG signals in longitudinal, lateral and transverse directions of muscle fibres were recorded from the elbow flexors of twenty-five male subjects using triaxial accelerometers. Cross-correlation coefficients were used to quantify the degree of crosstalk in all nine possible pairs of fibre axes, all muscle pairs and all exercises.
MMG root mean square (RMS) was statistically significant among the fibre axes (p<0.05, η2=0.17- 0.34) except for biceps brachii and brachioradialis in supination and brachialis in flexion. Overall mean crosstalk values in the three muscle pairs (biceps brachii & brachialis, brachialis & brachioradialis and brachioradialis & biceps brachii) were found to be 6.09-52.17%, 4.01-61.42% and 2.16-51.85%, respectively. Crosstalk values showed statistical significance among all nine axes pairs (p<0.05, η2=0.16-0.51) except for biceps brachii & brachialis during pronation. The transverse axes pair generated the lowest mean crosstalk values (2.16-9.14%).
MMG signals recorded using accelerometers from the transverse axes of muscle fibres in the elbow flexors are unique and yield the least amount of crosstalk.
分析在肘关节角度为 90°时，以 80%最大自主收缩（MVC）进行持续等长前臂内旋、旋前和旋后运动时，肌纤维轴对机械肌电图（MMG）信号串扰程度的影响。
使用三轴加速度计从 25 名男性受试者的肘屈肌中记录肌纤维的纵向、横向和横向方向的 MMG 信号。使用互相关系数来量化所有九对纤维轴、所有肌肉对和所有运动中串扰的程度。
除旋后时的肱二头肌和肱桡肌以及屈肌外，纤维轴之间的 MMG 均方根（RMS）差异具有统计学意义（p<0.05，η2=0.17-0.34）。在三个肌肉对（肱二头肌和肱肌、肱肌和肱桡肌以及肱桡肌和肱二头肌）中，总体平均串扰值分别为 6.09-52.17%、4.01-61.42%和 2.16-51.85%。除旋前时的肱二头肌和肱肌外，所有九对纤维轴之间的串扰值均具有统计学意义（p<0.05，η2=0.16-0.51）。横坐标轴对产生的平均串扰值最低（2.16-9.14%）。
使用加速度计从肘屈肌的肌纤维横坐标轴记录的 MMG 信号是独特的，并且产生的串扰最小。
