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首页> 外文期刊>The European Journal of Neuroscience >Hand blink reflex in virtual reality: The role of vision and proprioception in modulating defensive responses
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Hand blink reflex in virtual reality: The role of vision and proprioception in modulating defensive responses

机译：虚拟现实中的手眨眼反射：视觉和预防措施在调制防守响应中的作用

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Our research focused on the role of vision and proprioception in modulating a defensive reflex (hand blink reflex, HBR) whose magnitude is enhanced when the threatened hand is inside the peripersonal space of the face. We capitalized on virtual reality, which allows dissociating vision and proprioception by presenting a virtual limb in congruent/incongruent positions with respect to the participants' limb. In experiment 1, participants placed their own stimulated hand in far/near positions with respect to their face (postural manipulation task), while observing a virtual empty scenario. Vision was not informative, but the HBR was significantly enhanced in near compared with far position, suggesting that proprioception is sufficient for the HBR modulation to occur. In experiment 2, participants did not perform the postural manipulation but they (passively) observed the avatar's virtual limb performing it. Proprioceptive signals were not informative, but the HBR was significantly enhanced when the observed virtual limb was near to the face, suggesting that visual information plays a role in modulating the HBR. In experiment 3, both participants and avatar performed the postural manipulation, either congruently (both of them far/near) or incongruently (one of them far, the other near). The HBR modulation was present only in congruent conditions. In incongruent conditions, the conflict between vision and proprioception confounded the system, abolishing the difference between far and near positions. Taken together, these findings promote the view that observing a virtual limb modulates the HBR, providing also new evidence on the role of vision and proprioception in modulating this subcortical reflex.
机译：我们的研究侧重于视觉和预防型在调节防守反射（手眨眼反射，HBR）时的作用，当威胁的手在面部的围栏间空间内时，其幅度增加的幅度。我们利用虚拟现实资本化，这允许通过在与参与者的肢体的一致/不一致的职位上呈现虚拟肢体来解散视觉和预言。在实验1中，参与者将自己的刺激手放在相对于脸部（姿势操纵任务）的远/近位置，同时观察虚拟空情景。视觉不是信息性的，但与远远相比，HBR显着增强，表明预先应用足以发生HBR调节。在实验2中，参与者没有进行姿势操纵，而是（被动地）观察了化身的虚拟肢体执行它。预型信号不是信息性的，但是当观察到的虚拟肢体靠近面部时，HBR显着提高，表明视觉信息在调节HBR方面发挥作用。在实验3中，参与者和阿凡达都在进行姿势操纵，其中一致（它们都是远/近）或不一起来的（其中一个人，另一个接近）。 HBr调制仅存在于一致条件下。在不一致的条件下，视力与丙虫区之间的冲突混淆了该系统，从而消除了远近位置之间的差异。在一起，这些发现促进了观察虚拟肢体调节HBr的观点，也为视觉和预防在调节这种皮塔反射中的作用提供了新的证据。

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