Hand kinematics of piano playing
Hand kinematics of piano playing
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DOI：
10.1152/jn.00378.2011
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发表时间：
2011-12-01
影响因子：
2.5
通讯作者：
Soechting, John F.
中科院分区：
文献类型：
--
作者：
Furuya, Shinichi;Flanders, Martha;Soechting, John F.
古鲁雅S，佛兰德斯M，Soechting JF。钢琴演奏的手部运动学。神经生理学杂志106：2849-2864,2011。2011年8月31日首次出版；DOI：10.1152/jn.00378.2011。-灵巧地使用手代表着复杂的感觉运动功能。在弹钢琴等行为中，它可能涉及到很强的时间和空间限制。这项研究的目的是确定人类手部关节和手指运动的基本协变模式。当5位专业钢琴家演奏30段乐曲时，记录了关节运动，这些乐曲具有类似于50种不同的音调序列和指法。主成分分析和基于期望最大化算法的聚类分析表明，关节速度可以归结为几种模式，这有助于简化手部多自由度运动的描述。对于拇指击键，出现了两种不同的关节运动协变模式，它们取决于任务的时空模式。例如，拇指下方的动作根据手沿键盘的平移方向被清楚地分为两个簇。虽然拇指关节的速度模式在这些集群之间不同，但四个手指在掌指关节和近指关节的运动更为一致。对于用其中一个手指执行的击键，有三种不同的关节旋转模式，敲击手指的运动相当一致，但其他手指的运动更不稳定。此外，无论击键所用的手指是什么，敲击手指对相邻手指的移动溢出量都很小。这些发现描述了无与伦比的手指的独立运动量。
Furuya S, Flanders M, Soechting JF. Hand kinematics of piano playing. J Neurophysiol 106: 2849-2864, 2011. First published August 31, 2011; doi: 10.1152/jn.00378.2011.-Dexterous use of the hand represents a sophisticated sensorimotor function. In behaviors such as playing the piano, it can involve strong temporal and spatial constraints. The purpose of this study was to determine fundamental patterns of covariation of motion across joints and digits of the human hand. Joint motion was recorded while 5 expert pianists played 30 excerpts from musical pieces, which featured similar to 50 different tone sequences and fingering. Principal component analysis and cluster analysis using an expectation-maximization algorithm revealed that joint velocities could be categorized into several patterns, which help to simplify the description of the movements of the multiple degrees of freedom of the hand. For the thumb keystroke, two distinct patterns of joint movement covariation emerged and they depended on the spatiotemporal patterns of the task. For example, the thumb-under maneuver was clearly separated into two clusters based on the direction of hand translation along the keyboard. While the pattern of the thumb joint velocities differed between these clusters, the motions at the metacarpo-phalangeal and proximal-phalangeal joints of the four fingers were more consistent. For a keystroke executed with one of the fingers, there were three distinct patterns of joint rotations, across which motion at the striking finger was fairly consistent, but motion of the other fingers was more variable. Furthermore, the amount of movement spillover of the striking finger to the adjacent fingers was small irrespective of the finger used for the keystroke. These findings describe an unparalleled amount of independent motion of the fingers.