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首页> 外文期刊>Journal of Neurophysiology >Speed invariance of independent control of finger movements in pianists
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Speed invariance of independent control of finger movements in pianists

机译：钢琴家手指运动独立控制的快速不变性

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摘要

Independent control of finger movements characterizes skilled motor behaviors such as tool use and musical performance. The purpose of the present study was to identify the effect of movement frequency (tempo) on individuated finger movements in piano playing. Joint motion at the digits was recorded while 5 expert pianists were playing 30 excerpts from musical pieces with different fingering and key locations either at a predetermined normal tempo or as fast as possible. Principal component analysis and cluster analysis using an expectation-maximization algorithm determined three distinct patterns of finger movement coordination for a keypress with each of the index, middle, ring, and little fingers at each of the two tempi. The finger kinematics of each coordination pattern was overall similar across the tempi. Tone sequences assigned into each cluster were also similar for both tempi. A linear regression analysis determined no apparent difference in the amount of movement covariation between the striking and nonstriking fingers at both metacarpo-phalangeal and proximal-interphalangeal joints across the two tempi, which indicated no effect of tempo on independent finger movements in piano playing. In addition, the standard deviation of interkeystroke interval across strokes did not differ between the two tempi, indicating maintenance of rhythmic accuracy of keystrokes. Strong temporal constraints on finger movements during piano playing may underlie the maintained independent control of fingers over a wider range of tempi, a feature being likely to be specific to skilled pianists.
机译：独立控制手指运动表征熟练的电机行为，如刀具使用和音乐性能。本研究的目的是识别运动频率（Tempo）对钢琴演奏中的个体手指运动的影响。记录了数字的联合运动，而5名专家钢琴家在使用不同的指法和关键位置的乐器中摘录30件摘录，或者尽可能快地从音乐件中摘录。使用期望最大化算法的主成分分析和集群分析确定了每个索引，中​​间，环和小指的关键印刷的三个不同的手指运动协调模式。每个协调模式的手指运动学在速度上都相似。分配给每个群集的音调序列也是类似于etw的相似。线性回归分析确定了两种凝固术中击球和非近代骨髓间关节的击球和非近代关节之间的运动变焦的显着差异，这在钢琴演奏中没有对速度的独立手指运动作用。此外，两个TEMPI之间的接口间隔的标准偏差在两个速度之间没有区别，表明击键的节奏精度维持。在钢琴演奏期间，手指运动的强大时间限制可能是在更广泛的温度范围内保持对手指的独立控制，这一功能可能是熟练的钢琴家特定的特征。

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