Motor coordination uses external spatial coordinates independent of developmental vision
Motor coordination uses external spatial coordinates independent of developmental vision
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DOI：
10.1016/j.cognition.2014.03.005
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发表时间：
2014-07-01
期刊：
影响因子：
3.4
通讯作者：
Roeder, Brigitte
中科院分区：
文献类型：
--
作者：
Heed, Tobias;Roeder, Brigitte
指导双手运动协调的约束条件是关于人类运动规划的基本处理原理的信息。例如，相对于身体中线的对称性有利于手指和手的运动，而与手部姿势无关。这种对称性约束被解释为表明运动协调是由感知代码引导的。尽管人们隐含地假设这种限制的核心知觉系统是视觉，但这种关系还没有得到检验。在这里，先天失明和视力正常的参与者进行对称和非对称(即平行)的双手敲击和手指摆动运动。在两组受试者中，对称动作的执行都比平行动作更准确，不受手指同源性和手势等解剖约束的影响。对于盲人来说，在运动协调中对外部空间因素的依赖与他们在知觉处理中使用解剖参照系形成了鲜明的对比。因此，在双手协调中明显的外部编码对称性约束可以在没有视觉系统的情况下发展，这表明视觉系统对于运动协调中外部空间参照系的建立并不关键。(C)2014爱思唯尔B.V.保留所有权利。
The constraints that guide bimanual movement coordination are informative about the processing principles underlying movement planning in humans. For example, symmetry relative to the body midline benefits finger and hand movements independent of hand posture. This symmetry constraint has been interpreted to indicate that movement coordination is guided by a perceptual code. Although it has been assumed implicitly that the perceptual system at the heart of this constraint is vision, this relationship has not been tested. Here, congenitally blind and sighted participants made symmetrical and non-symmetrical (that is, parallel) bimanual tapping and finger oscillation movements. For both groups, symmetrical movements were executed more correctly than parallel movements, independent of anatomical constraints like finger homology and hand posture. For the blind, the reliance on external spatial factors in movement coordination stands in stark contrast to their use of an anatomical reference frame in perceptual processing. Thus, the externally coded symmetry constraint evident in bimanual coordination can develop in the absence of the visual system, suggesting that the visual system is not critical for the establishment of an external-spatial reference frame in movement coordination. (C) 2014 Elsevier B.V. All rights reserved.