Cross talk in implicit assignment of error information during bimanual visuomotor learning
Cross talk in implicit assignment of error information during bimanual visuomotor learning
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DOI：
10.1152/jn.00278.2011
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发表时间：
2011-09-01
影响因子：
2.5
通讯作者：
Nozaki, Daichi
中科院分区：
文献类型：
--
作者：
Kasuga, Shoko;Nozaki, Daichi
李建军，张建军，张建军，等。视觉运动学习中错误信息的内隐分配。[J] .中国生物医学工程学报，2011；首次发表于2011年6月8日；doi: 10.1152 / jn.00278.2011。当一个被称为“内部模型”的神经运动控制器适应一个新的环境时，运动误差需要与控制器适当地联系起来。然而，对于两个控制器（每只手一个控制器）导致两次运动错误的双手运动，它们的关联并不一定得到保证。考虑到适应过程的隐式性质，一只手的运动误差可能与另一只手的控制器错误地联系在一起。在这里，我们通过让参与者在仅用光标显示右手位置的情况下进行双手对称的前后运动来研究双手运动中的信用分配问题。在训练过程中，光标的位置逐渐顺时针旋转，这样参与者就不会意识到这种旋转。作为适应的结果，右手的运动逐渐逆时针旋转。虽然参与者知道光标反映了右手的运动，但对于看不见的左手也观察到这种逐渐的适应，特别是当光标出现在显示器的左侧时。因此，右手的运动误差隐式地分配给左手控制器。当两个游标同时出现时，信用分配中的串扰也会影响运动适应的表现；当施加在游标上的旋转方向与施加在相同方向上的旋转方向相反时，适应能力受到损害。这些结果表明，在将动作与结果联系起来的双手运动过程中，固有的相声存在。
Kasuga S, Nozaki D. Cross talk in implicit assignment of error information during bimanual visuomotor learning. J Neurophysiol 106: 12181226, 2011. First published June 8, 2011; doi:10.1152/jn.00278.2011.-When a neural movement controller, called an "internal model," is adapted to a novel environment, the movement error needs to be appropriately associated with the controller. However, their association is not necessarily guaranteed for bimanual movements in which two controllers-one for each hand-result in two movement errors. Considering the implicit nature of the adaptation process, the movement error of one hand can be erroneously associated with the controller of the other hand. Here, we investigated this credit-assignment problem in bimanual movement by having participants perform bimanual, symmetric back-and-forth movements while displaying the position of the right hand only with a cursor. In the training session, the cursor position was gradually rotated clockwise, such that the participants were unaware of the rotation. The movement of the right hand gradually rotated counterclockwise as a consequence of adaptation. Although the participants knew that the cursor reflected the movement of the right hand, such gradual adaptation was also observed for the invisible left hand, especially when the cursor was presented on the left side of the display. Thus the movement error of the right hand was implicitly assigned to the left-hand controller. Such cross talk in credit assignment might influence motor adaptation performance, even when two cursors are presented; the adaptation was impaired when the rotations imposed on the cursors were opposite compared with when they were in the same direction. These results indicate the inherent presence of cross talk in the process of associating action with consequence in bimanual movement.