Speed invariance of independent control of finger movements in pianists
Speed invariance of independent control of finger movements in pianists
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DOI：
10.1152/jn.00378.2012
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发表时间：
2012-10-01
影响因子：
2.5
通讯作者：
Soechting, John F.
中科院分区：
文献类型：
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作者：
Furuya, Shinichi;Soechting, John F.
Furuya S，Soechting JF.钢琴家独立控制手指运动的速度不变性。J Neurophysiol 108：2060-2068，2012.首次发表于2012年7月18日; doi：10.1152/jn.00378.2012.Independent control of finger movements characterized skilled motor behaviors such as tools use and musical performance.本研究的目的是确定钢琴演奏中的动作频率（克里思）对个性化手指动作的影响。当5位专业钢琴家以预定的正常克里思或尽可能快地演奏来自具有不同指法和键位置的音乐作品的30个摘录时，记录手指处的关节运动。主成分分析和聚类分析，使用期望最大化算法确定了三个不同的模式的手指运动协调与每个的索引，中间，环，和小手指在两个tempi的每一个按键。每个协调模式的手指运动学在整个tempi中总体相似。音调序列分配到每个集群也是相似的两个tempi。线性回归分析确定没有明显的差异，在两个tempi，这表明没有影响的克里思独立的手指运动在钢琴演奏的手指之间的运动协变量的罢工和nonstriking手指在两个掌指骨和近端指间关节。此外，两种节奏之间的笔画间隔的标准差没有差异，这表明节奏的准确性。在钢琴演奏期间对手指运动的强时间约束可能是在更宽范围的节奏上保持手指的独立控制的基础，这一特征可能是熟练的钢琴家特有的。
Furuya S, Soechting JF. Speed invariance of independent control of finger movements in pianists. J Neurophysiol 108: 2060-2068, 2012. First published July 18, 2012; doi: 10.1152/jn.00378.2012.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.