Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, USA.
Neurosci Lett. 2012 Apr 18;514(2):185-8. doi: 10.1016/j.neulet.2012.02.089. Epub 2012 Mar 5.
Spike shape analysis (SSA) is a method to infer motor unit (MU) activity by examining interference pattern of surface electromyography (sEMG). SSA has succeeded to assess neuromuscular adaptations after dynamic training; however, it has not been used to assess muscle activities during the dynamic movements as seen in music performance. The present study used SSA to investigate sEMG activities of wrist flexor and extensor muscles in the winner of a contest to find the world's fastest drummer (WFD) during performing rhythmic wrist flexion/extension movements with one hand using a handheld drumstick. SSA measures of the WFD were compared with those in the two control groups: non-drummers (NDs) and ordinary drummers (ODs). We found that the WFD showed significantly high mean spike frequency (MSF), short mean spike duration (MSD), and small mean number of peaks per spike (MNPPS) compared with the control groups. These results suggest that the WFD had exceptional MU activity such as higher MU discharge rate, more MU recruitment, and/or higher MU synchronization to achieve extraordinary fast 10-Hz drumming performance. SSA will be useful to investigate the muscle activity seen in music performance.
棘波形状分析（SSA）是一种通过检查表面肌电图（sEMG）的干扰模式来推断运动单位（MU）活动的方法。SSA已成功评估了动态训练后的神经肌肉适应性；然而，它尚未用于评估在音乐表演中所见的动态运动期间的肌肉活动。本研究使用 SSA 来研究在单手使用手持鼓棒进行有节奏的腕部屈伸运动时，世界最快鼓手（WFD）在进行比赛时的腕屈肌和伸肌的 sEMG 活动。将 WFD 的 SSA 测量值与两个对照组（非鼓手（NDs）和普通鼓手（ODs））进行比较。我们发现，与对照组相比，WFD 的平均尖峰频率（MSF）、平均尖峰持续时间（MSD）和每个尖峰的平均峰数（MNPPS）均显著较高。这些结果表明，WFD 具有异常高的 MU 活动，例如更高的 MU 放电率、更多的 MU 募集和/或更高的 MU 同步，以实现非凡的 10Hz 击鼓性能。SSA 将有助于研究音乐表演中所见的肌肉活动。
