The influence of visual motion on motor learning.
The influence of visual motion on motor learning.
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DOI：
10.1523/jneurosci.5528-11.2012
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发表时间：
2012-07-18
期刊：
影响因子：
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通讯作者：
Mussa-Ivaldi FA
中科院分区：
文献类型：
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作者：
Danziger Z;Mussa-Ivaldi FA
视觉感知如何塑造我们协调运动的方式？最近的研究表明，大脑组织运动的基础上最大限度地减少在运动和感官噪音的存在下达到错误。我们提出了一个替代假设，其中运动轨迹也是由于获得的知识的对象，大脑控制的几何特性。为了验证这一假设，我们要求人类受试者通过连续的手指运动来控制模拟的运动联动，这是一种全新的体验。这种范式消除了由肢体动力学和过去经验的影响所产生的所有偏见。受试者暴露于两种不同类型的视觉反馈;一些人看到了整个模拟联动装置，另一些人只看到了移动的肢体。与我们的假设相一致，受试者学会了移动模拟联动沿着测地线对应的几何结构所观察到的运动。因此，优化最终精度不是弹道形成的唯一决定因素。
How does visual perception shape the way we coordinate movements? Recent studies suggest that the brain organizes movements based on minimizing reaching errors in the presence of motor and sensory noise. We present an alternative hypothesis in which movement trajectories also result from acquired knowledge about the geometrical properties of the object that the brain is controlling. To test this hypothesis we asked human subjects to control a simulated kinematic linkage by continuous finger motion, a completely novel experience. This paradigm removed all biases arising from influences of limb dynamics and past experience. Subjects were exposed to two different types of visual feedback; some saw the entire simulated linkage and others saw only the moving extremity. Consistent with our hypothesis, subjects learned to move the simulated linkage along geodesic lines corresponding to the geometrical structure of the observed motion. Thus, optimizing final accuracy is not the unique determinant of trajectory formation.