While it is well known that vision guides movement, less appreciated is that the motor cortex also provides input to the visual system. Here, we asked whether neural processing of visual stimuli is acutely modulated during motor activity, hypothesizing that visual evoked responses are enhanced when engaged in a motor task that depends on the visual stimulus. To test this, we told participants that their brain activity was controlling a video game that was in fact the playback of a prerecorded game. The deception, which was effective in half of participants, aimed to engage the motor system while avoiding evoked responses related to actual movement or somatosensation. In other trials, subjects actively played the game with keyboard control or passively watched a playback. The strength of visually evoked responses was measured as the temporal correlation between the continuous stimulus and the evoked potentials on the scalp. We found reduced correlation during passive viewing, but no difference between active and sham play. Alpha‐band (8–12 Hz) activity was reduced over central electrodes during sham play, indicating recruitment of motor cortex despite the absence of overt movement. To account for the potential increase of attention during gameplay, we conducted a second study with subjects counting screen items during viewing. We again found increased correlation during sham play, but no difference between counting and passive viewing. While we cannot fully rule out the involvement of attention, our findings do demonstrate an enhancement of visual evoked responses during active vision.

中文翻译：

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参与视频游戏时，视觉诱发的反应会得到增强。

虽然众所周知视觉引导运动，但很少有人意识到运动皮层也为视觉系统提供输入。在这里，我们询问视觉刺激的神经处理是否在运动活动期间受到剧烈调节，假设当从事依赖于视觉刺激的运动任务时，视觉诱发反应会增强。为了测试这一点，我们告诉参与者他们的大脑活动正在控制一个实际上是播放预先录制的游戏的视频游戏。这种欺骗在一半的参与者中有效，旨在让运动系统参与进来，同时避免与实际运动或躯体感觉相关的诱发反应。在其他试验中，受试者通过键盘控制主动玩游戏或被动观看回放。视觉诱发反应的强度被测量为连续刺激和头皮上诱发电位之间的时间相关性。我们发现在被动观看期间相关性降低，但主动和假玩之间没有区别。在模拟游戏期间，中央电极上的 Alpha 波段（8-12 Hz）活动减少，表明尽管没有明显的运动，但运动皮层的募集。考虑到游戏过程中注意力的潜在增加，我们进行了第二项研究，受试者在观看过程中计算屏幕项目。我们再次发现假游戏期间相关性增加，但计数和被动观看之间没有区别。虽然我们不能完全排除注意力的参与，但我们的研究结果确实证明了在主动视觉期间视觉诱发反应的增强。