Body ownership refers to the distinct sensation that our observed body belongs to us, which is believed to stem from multisensory integration. This is commonly shown through the rubber hand illusion (RHI), which induces a sense of ownership over a false limb. Whilst the RHI may interfere with object-directed action and alter motor cortical activity, it is not yet clear whether a sense of ownership over an artificial hand has functional consequences for movement production per se. As such, we performed two motion-tracking experiments (n = 117) to examine the effects of the RHI on the reaction time, acceleration, and velocity of rapid index finger abduction. We observed little convincing evidence that the induction of the RHI altered these kinematic variables. Moreover, the subjective sensations of rubber hand ownership, referral of touch, and agency did not convincingly correlate with kinematic variables, and nor did proprioceptive drift, suggesting that changes in body representation elicited by the RHI may not influence basic movement. Whilst experiment 1 suggested that individuals reporting a greater sensation of the real hand disappearing performed movements with smaller acceleration and velocity following illusion induction, we did not replicate this effect in a second experiment, suggesting that these effects may be small or not particularly robust. Overall, these results indicate that manipulating the conscious experience of body ownership has little impact on basic motor control, at least in the RHI with healthy participants.

中文翻译：

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几乎没有证据表明橡胶手错觉对基本运动的影响

身体所有权是指我们观察到的身体属于我们的独特感觉，这被认为源于多感官整合。这通常通过橡胶手错觉 (RHI) 显示出来，它会引起对假肢的主人翁感。虽然 RHI 可能会干扰面向对象的动作并改变运动皮层活动，但目前尚不清楚对假手的主人翁感是否对动作产生本身具有功能性影响。因此，我们进行了两个运动跟踪实验（n = 117) 检查 RHI 对快速食指外展的反应时间、加速度和速度的影响。我们几乎没有观察到令人信服的证据表明 RHI 的诱导改变了这些运动学变量。此外，橡胶手所有权、触摸转介和代理的主观感觉与运动学变量和本体感觉漂移都没有令人信服的相关性，这表明 RHI 引起的身体表征的变化可能不会影响基本运动。虽然实验 1 表明，报告真实手消失的更大感觉的个体在幻觉诱导后以较小的加速度和速度进行运动，但我们没有在第二个实验中复制这种效果，这表明这些效果可能很小或不是特别强烈。总体，