Eye–hand coordination during visuomotor adaptation: effects of hemispace and joint coordination
Eye–hand coordination during visuomotor adaptation: effects of hemispace and joint coordination
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视觉运动适应过程中的眼手协调：半空间和关节协调的影响
DOI：
10.1007/s00221-017-5088-z
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发表时间：
2017
影响因子：
2
通讯作者：
Rentsch
中科院分区：
文献类型：
--
作者：
Rentsch
我们先前研究了视觉运动旋转学习过程中眼手协调的适应性变化。在早期练习中，伸展运动中的凝视最初指向反馈光标，但随着更多的练习逐渐转向目标，这表明出现了一种凝视锚定行为。这种适应模式反映了凝视控制从探索光标-手关系到引导手指向任务目标的功能变化。本研究进一步考察了半空间和与目标方向相关的联合协调对这一行为的影响。年轻人看着电脑显示器上旋转的视觉反馈光标，用右手在水平数字化仪上向四个目标执行中心外伸展运动。为了考察与视觉刺激相关的半空间效应，四个目标中有两个位于相对于所用手的同侧工作空间，另外两个位于对侧工作空间。为了考察与手动动作有关的半空间效应，在四个目标中，两个目标与同侧工作空间中的REACH有关，另外两个目标与对侧工作空间中的REACH有关。此外，为了检验关节协调的复杂性的影响，在四个目标中，有两个目标达到了从开始到目标的直接路径，涉及肘部运动(简单)，而另外两个目标达到了同时涉及肩部和肘部运动(复杂)。结果表明，视线锚定行为是在训练过程中逐渐形成的，在各个目标方向上都有。这一变化的速度主要受与手动操作有关的半空间的影响，而其他两个影响很小。凝视锚定发生在同侧触角比对侧触角更快；凝视锚定之前的凝视也较少指向光标附近，而更多地指向起点和目标之间的中间区域。这些结果表明，在视觉运动旋转的情况下，同侧触觉对光标-手的关系具有更好的预测性，从而促使凝视控制从反应性控制更早地转变为预测性控制。
We previously examined adaptive changes of eye–hand coordination during learning of a visuomotor rotation. Gazes during reaching movements were initially directed to a feedback cursor in early practice, but were gradually shifted toward the target with more practice, indicating an emerging gaze anchoring behavior. This adaptive pattern reflected a functional change of gaze control from exploring the cursor–hand relation to guiding the hand to the task goal. The present study further examined the effects of hemispace and joint coordination associated with target directions on this behavior. Young adults performed center-out reaching movements to four targets with their right hand on a horizontal digitizer, while looking at a rotated visual feedback cursor on a computer monitor. To examine the effect of hemispace related to visual stimuli, two out of the four targets were located in the ipsilateral workspace relative to the hand used, the other two in the contralateral workspace. To examine the effect of hemispace related to manual actions, two among the four targets were related to reaches made in the ipsilateral workspace, the other two to reaches made in the contralateral workspace. Furthermore, to examine the effect of the complexity of joint coordination, two among the four targets were reaches involving a direct path from the start to the target involving elbow movements (simple), whereas the other two targets were reaches involving both shoulder and elbow movements (complex). The results showed that the gaze anchoring behavior gradually emerged during practice for reaches made in all target directions. The speed of this change was affected mainly by the hemispace related to manual actions, whereas the other two effects were minimal. The gaze anchoring occurred faster for the ipsilateral reaches than for the contralateral reaches; gazes prior to the gaze anchoring were also directed less at the cursor vicinity but more at the mid-area between the starting point and the target. These results suggest that ipsilateral reaches result in a better predictability of the cursor–hand relation under the visuomotor rotation, thereby prompting an earlier functional change of gaze control through practice from a reactive to a predictive control.
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不同速度的画圆运动：惯性各向异性的作用。
DOI：
10.1152/jn.00946.2001
发表时间：
2002
期刊：
Journal of neurophysiology.
影响因子：
--
作者：
Pfann,KerstinD;Corcos,DanielM;Moore,CharityG;Hasan,Ziaul
通讯作者：
Hasan,Ziaul
影响因子：
1.4
作者：
Kim, Wondae;Buchanan, John;Gabbard, Carl
通讯作者：
Gabbard, Carl
影响因子：
3.4
作者：
Collins, Therese;Schicke, Tobias;Roder, Brigitte
通讯作者：
Roder, Brigitte
DOI：
10.1037/h0084172
发表时间：
1988-03-01
期刊：
CANADIAN JOURNAL OF PSYCHOLOGY-REVUE CANADIENNE DE PSYCHOLOGIE
影响因子：
--
作者：
ELLIOTT, D
通讯作者：
ELLIOTT, D
影响因子：
3.7
作者：
Heuer, Herbert;Hegele, Mathias
通讯作者：
Hegele, Mathias