Fujii Shinya, Kudo Kazutoshi, Ohtsuki Tatsuyuki, Oda Shingo
Laboratory of Human Motor Control, Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan.
Neurosci Lett. 2009 Aug 7;459(2):69-73. doi: 10.1016/j.neulet.2009.04.055. Epub 2009 May 4.
Studies of rapid unimanual tapping have assumed that the human rate limit for voluntary rhythmic movement is 5-7 Hz, which corresponds to an inter-tap interval (ITI) of 150-200ms. In fact, the winner of a recent contest to find the world's fastest drummer (WFD) can perform such movements using a handheld drumstick at 10 Hz, which corresponds to an ITI of 100 ms. Because the contest measured only the number of taps by the WFD, we examined the stability of the ITI and the underlying wrist muscle activity of the WFD. By comparing the performance and wrist muscle activity of the WFD with those of two control groups (non-drummers (NDs) and ordinary skilled drummers (ODs)), we found that the WFD had a relatively stable ITI and more pronounced reciprocal wrist muscle activity during the 10-Hz performance. Our result indicates that very fast, stable tapping performance can be achieved by keeping the wrist joint compliant rather than stiff.
快速单手敲击的研究假定，人类自主节律运动的频率极限是5-7赫兹，这相当于每次敲击间隔（ITI）为150-200毫秒。事实上，最近一场寻找世界最快鼓手（WFD）比赛的获胜者能够以10赫兹的频率使用手持鼓槌进行此类运动，这相当于每次敲击间隔为100毫秒。由于该比赛仅测量了WFD的敲击次数，我们研究了WFD的ITI稳定性以及其手腕肌肉活动情况。通过将WFD的表现和手腕肌肉活动与两个对照组（非鼓手（NDs）和普通熟练鼓手（ODs））进行比较，我们发现WFD在10赫兹的表现中具有相对稳定的ITI以及更明显的手腕肌肉交互活动。我们的结果表明，通过保持腕关节柔顺而非僵硬，可以实现非常快速、稳定的敲击表现。
