Effective utilization of gravity during arm downswing in keystrokes by expert pianists. Neuroscience. 2009 Dec 1;164(2):822-31. Epub 2009 Aug 18. Furuya S, Osu R, Kinoshita H. 音楽家と一般人でピアノを弾くときの腕の使い方の違いを調べた研究…