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首页> 外文期刊>Scientific reports. >Altered visual feedback from an embodied avatar unconsciously influences movement amplitude and muscle activity
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Altered visual feedback from an embodied avatar unconsciously influences movement amplitude and muscle activity

机译：从体现的化身改变了视觉反馈，无意识地影响运动幅度和肌肉活动

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Evidence suggests that the sense of the position of our body parts can be surreptitiously deceived, for instance through illusory visual inputs. However, whether altered visual feedback during limb movement can induce substantial unconscious motor and muscular adjustments is not known. To address this question, we covertly manipulated virtual body movements in immersive virtual reality. Participants were instructed to flex their elbow to 90° while tensing an elastic band, as their virtual arm reproduced the same, a reduced (75°), or an amplified (105°) movement. We recorded muscle activity using electromyography, and assessed body ownership, agency and proprioception of the arm. Our results not only show that participants compensated for the avatar's manipulated arm movement while being completely unaware of it, but also that it is possible to induce unconscious motor adaptations requiring significant changes in muscular activity. Altered visual feedback through body ownership illusions can influence motor performance in a process that bypasses awareness.
机译：证据表明，可以通过虚幻的视觉输入偷偷地欺骗我们身体部位的位置的感觉。但是，在肢体运动期间改变的视觉反馈是否可以诱导大量无意识的电动机，并且不知道肌肉调节。为了解决这个问题，我们隐瞒了在沉浸式虚拟现实中操纵虚拟机身运动。参与者被指示将其肘部弯曲至90°，同时紧张弹性带，因为它们的虚拟臂再现相同，减小（75°）或放大（105°）运动。我们使用肌电图记录了肌肉活动，并评估了手臂的身体所有权，机构和血目。我们的结果不仅表明参与者对阿凡达的操纵臂运动弥补了完全没有意识到的，而且还可以诱导无意识的电动机适应需要显着变化的肌肉活动。通过身体所有权幻想改变的视觉反馈可以影响绕过意识的过程中的电机性能。

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