Department of Health and Kinesiology, Texas A&M University, College Station, TX 77843-4243, USA.
Exp Brain Res. 2010 Mar;201(2):249-59. doi: 10.1007/s00221-009-2031-y. Epub 2009 Oct 2.
The present findings demonstrate that when participants are provided a Lissajous display with cursor indicating the position of the limbs and a template illustrating the desired movement pattern they can rapidly (10 min) and effectively (continuous relative phase errors and variability ~10 degrees ) tune in a difficult 5:3 bimanual coordination pattern and without additional practice re-tune their responding to an equally difficult 4:3 coordination pattern. The findings indicate the extreme difficulty associated with producing complex polyrhythms in previous experiments has been due to split attention when Lissajous feedback has been provided and inability of the participant to detect and correct coordination errors when only provided vision of the limbs. Effective transfer to the 4:3 polyrhythm without previous practice suggests that the perception-action system's capabilities are extensive. The present findings when viewed in the context of recent experiments using similar protocols suggest that much, but not all, of the difficulty associated with producing a variety of bimanual coordination tasks should be viewed in terms of perceptual constraints imposed by the testing environment.
目前的研究结果表明，当参与者提供一个带有光标指示肢体位置的李萨如（Lissajous）显示和一个说明所需运动模式的模板时，他们可以快速（10 分钟）有效地（连续相对相位误差和变异性约 10 度）调整一个困难的 5:3 双手协调模式，并且无需额外的练习就可以重新调整到同样困难的 4:3 协调模式。这些发现表明，在之前的实验中，产生复杂复节奏的极端困难是由于提供李萨如反馈时注意力分散，以及当仅提供肢体视觉时，参与者无法检测和纠正协调错误。在没有先前练习的情况下有效地转移到 4:3 复节奏，表明感知-动作系统的能力是广泛的。当将目前的发现置于使用类似协议的最近实验的背景下时，人们认为，与产生各种双手协调任务相关的大部分但不是全部困难都应从测试环境施加的感知限制的角度来看待。
