Removal of proprioception by BCI raises a stronger body ownership illusion in control of a humanlike robot
Removal of proprioception by BCI raises a stronger body ownership illusion in control of a humanlike robot
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DOI：
10.1038/srep33514
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发表时间：
2016-09-22
影响因子：
4.6
通讯作者：
Ishiguro, Hiroshi
中科院分区：
文献类型：
--
作者：
Alimardani, Maryam;Nishio, Shuichi;Ishiguro, Hiroshi
身体所有权错觉提供了证据，证明我们的自我意识是不连贯的，可以扩展到非身体物体。对这些错觉的研究为我们提供了实用的工具，以了解身体识别和自我体验的大脑机制。我们以前介绍了一个错觉的身体所有权转移（BOT）的操作员非常人性化的机器人。这种拥有机器人身体的感觉在操作员通过用他们的身体执行所需的运动（运动控制）或通过采用脑机接口（BCI）将运动想象命令转换为机器人运动（BCI控制）来控制机器人时得到了证实。在BCI控制期间的有趣观察是，即使在BCI系统中有明显的延迟，也可以诱导错觉。时间差异对身体所有权错觉的弱化作用一直是关键性的。然而，在BCI控制期间的延迟鲁棒性的BOT提出了一个问题，本体感受输入和延迟的视觉反馈之间的相互作用，在代理驱动的错觉。在这项工作中，我们比较了在两种情况下，操作员的BOT错觉的强度;运动控制和BCI控制。我们的研究结果显示，BCI控制的情况下，一个显着更强的BOT错觉。这一发现强调了BCI通过在大脑和受控身体之间建立直接沟通，从而消除受试者自身身体的意识，从而诱导更强的代理驱动错觉的潜力。
Body ownership illusions provide evidence that our sense of self is not coherent and can be extended to non-body objects. Studying about these illusions gives us practical tools to understand the brain mechanisms that underlie body recognition and the experience of self. We previously introduced an illusion of body ownership transfer (BOT) for operators of a very humanlike robot. This sensation of owning the robot's body was confirmed when operators controlled the robot either by performing the desired motion with their body (motion-control) or by employing a brain-computer interface (BCI) that translated motor imagery commands to robot movement (BCI-control). The interesting observation during BCI-control was that the illusion could be induced even with a noticeable delay in the BCI system. Temporal discrepancy has always shown critical weakening effects on body ownership illusions. However the delay-robustness of BOT during BCI-control raised a question about the interaction between the proprioceptive inputs and delayed visual feedback in agency-driven illusions. In this work, we compared the intensity of BOT illusion for operators in two conditions; motion-control and BCI-control. Our results revealed a significantly stronger BOT illusion for the case of BCI-control. This finding highlights BCI's potential in inducing stronger agency-driven illusions by building a direct communication between the brain and controlled body, and therefore removing awareness from the subject's own body.