Selective Regions of the Visuomotor System Are Related to Gain-Induced Changes in Force Error
Selective Regions of the Visuomotor System Are Related to Gain-Induced Changes in Force Error
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DOI：
10.1152/jn.00920.2009
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发表时间：
2010-04-01
影响因子：
2.5
通讯作者：
Vaillancourt, David E.
中科院分区：
文献类型：
--
作者：
Coombes, Stephen A.;Corcos, Daniel M.;Vaillancourt, David E.
Coombes SA，Corcos DM，Sprute L，Vaillancourt DE.视觉系统的选择性区域与力误差中的增益引起的变化有关。J Neurophysiol 103：2114-2123，2010.首次发表于2010年2月24日; doi：10.1152/jn.00920.2009。当人类执行动作并接收关于其表现的在线视觉反馈时，视觉信息的空间质量改变表现。视觉信息的空间质量可以通过操纵视觉增益来改变，视觉增益的变化导致力误差的变化。目前的研究使用功能性磁共振成像在稳态精密握力任务，以检查皮层和皮层下的大脑活动如何改变视觉增益引起的力误差的变化。视觉增益1度的小幅增加与力误差的小幅变化和视觉反馈空间振幅的大幅变化相关。这些行为效应与双侧背侧和腹侧运动前区以及右侧顶下小叶的活动增加相对应。最后，活动在左侧和右侧小叶VI的小脑和左侧和右侧壳核没有改变视觉增益的增加。总之，这些研究结果表明，视觉系统并不一致的视觉反馈增益的变化作出反应。相反，视觉系统的特定区域选择性地改变与力误差的大变化和视觉反馈的空间幅度的大变化相关的活动。
Coombes SA, Corcos DM, Sprute L, Vaillancourt DE. Selective regions of the visuomotor system are related to gain-induced changes in force error. J Neurophysiol 103: 2114-2123, 2010. First published February 24, 2010; doi: 10.1152/jn.00920.2009. When humans perform movements and receive on-line visual feedback about their performance, the spatial qualities of the visual information alter performance. The spatial qualities of visual information can be altered via the manipulation of visual gain and changes in visual gain lead to changes in force error. The current study used functional magnetic resonance imaging during a steady-state precision grip force task to examine how cortical and subcortical brain activity can change with visual gain induced changes in force error. Small increases in visual gain 1 degrees were associated with a small change in force error and a large change in the spatial amplitude of visual feedback. These behavioral effects corresponded with increased activity bilaterally in dorsal and ventral premotor areas and right inferior parietal lobule. Finally, activity in the left and right lobule VI of the cerebellum and left and right putamen did not change with increases in visual gain. Together, these findings demonstrate that the visuomotor system does not respond uniformly to changes in the gain of visual feedback. Instead, specific regions of the visuomotor system selectively change in activity related to large changes in force error and large changes in the spatial amplitude of visual feedback.