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首页> 外文期刊>The European Journal of Neuroscience >Visual and proprioceptive recalibrations after exposure to a visuomotor rotation
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Visual and proprioceptive recalibrations after exposure to a visuomotor rotation

机译：暴露于游瓜素旋转后的视觉和预读数

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Adaptation to a visuomotor rotation in a cursor-control task is accompanied by proprioceptive recalibration, whereas the existence of visual recalibration is uncertain and has even been doubted. In the present study, we tested both visual and proprioceptive recalibration; proprioceptive recalibration was not only assessed by means of psychophysical judgments of the perceived position of the hand, but also by an indirect procedure based on movement characteristics. Participants adapted to a gradually introduced visuomotor rotation of 30 degrees by making center-out movements to remembered targets. In subsequent test trials, they made center-out movements without visual feedback or observed center-out motions of a cursor without moving the hand. In each test trial, they judged the endpoint of hand or cursor by matching the position of the hand or of a visual marker, respectively, moving along a semicircular path. This path ran through all possible endpoints of the center-out movements. We observed proprioceptive recalibration of 7.3 degrees (3.1 degrees with the indirect procedure) and a smaller, but significant, visual recalibration of 1.3 degrees. Total recalibration of 8.6 degrees was about half as strong as motor adaptation, the adaptive shift of the movement direction. The evidence of both proprioceptive and visual recalibration was obtained with a judgment procedure that suggests that recalibration is restricted to the type of movement performed during exposure to a visuomotor rotation. Consequently, identical physical positions of the hand can be perceived differently depending on how they have been reached, and similarly identical positions of a cursor on a monitor can be perceived differently.
机译：在光标控制任务中适应对游标控制任务的旋转伴随着原主的重新校准，而视觉重新校准的存在是不确定的并且甚至被怀疑。在本研究中，我们测试了视觉和预读数的重新校准;预读数不仅通过手动感知地位的心理物理判断评估，而且仅通过基于运动特性的间接程序来评估。参与者通过使中心出现的目标进行核心运动来逐渐引入30度的求振旋转。在随后的测试试验中，它们在没有视觉反馈的情况下使得中心出现或观察到光标的中央动作而不移动手。在每个测试试验中，它们通过分别匹配手或视觉标记的位置来判断手或光标的端点，沿着半圆形路径移动。这条路径通过了中心输出的所有可能的端点。我们观察到了7.3度（间接手术3.1度的3.1度）和较小但显着，视觉重新校准为1.3度的预读数。作为电动机适应的总重新校准为8.6度，大约一半，运动方向的自适应偏移。获得了预读力和视觉重新校准的证据，提出了一种判断程序，表明重新校准被限制在暴露于遮挡率旋转期间进行的运动类型。因此，可以根据已经达到的方式不同地感知手的相同物理位置，并且可以不同地感知到监视器上的光标上的类似相同的位置。

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