Yano Shiro, Kondo Toshiyuki
Annu Int Conf IEEE Eng Med Biol Soc. 2017 Jul;2017:2534-2537. doi: 10.1109/EMBC.2017.8037373.
This study aims to analyze muscle synergies in darts throwing movement to clarify how the central nervous system (CNS) controls muscle activation to produce complicated motion. Activities of 10 different muscles on upper limb were recorded through surface electromyography (EMG) electrodes from four participants with less experience of dart throwing. Subsequently, non-negative matrix factorization (NNMF) was applied to the collected EMG signals for muscle synergy analysis. Results showed that three muscle synergies could explain sufficiently the observed EMG data, with determination coefficient r = 0.91 ± 0.02 across four subjects. However, it was found that there was significant difference in terms of patterns of both muscle synergies and activation coefficients between participants, which might reflect different neuromuscular control strategies in dart throwing.
本研究旨在分析飞镖投掷动作中的肌肉协同作用，以阐明中枢神经系统（CNS）如何控制肌肉激活来产生复杂运动。通过表面肌电图（EMG）电极记录了4名飞镖投掷经验较少的参与者上肢10块不同肌肉的活动。随后，将非负矩阵分解（NNMF）应用于收集到的EMG信号进行肌肉协同分析。结果表明，三种肌肉协同作用足以解释观察到的EMG数据，四名受试者的决定系数r = 0.91±0.02。然而，发现参与者之间在肌肉协同作用模式和激活系数方面存在显著差异，这可能反映了飞镖投掷中不同的神经肌肉控制策略。
