Modulation of Bodily Self-Consciousness by Self and External Touch
Modulation of Bodily Self-Consciousness by Self and External Touch
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DOI：
10.1109/toh.2021.3067651
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发表时间：
2021-07-01
影响因子：
2.9
通讯作者：
Salomon, Roy
中科院分区：
文献类型：
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作者：
Hara, Masayuki;Kanayama, Noriaki;Salomon, Roy
全身错觉（FBI）是一种身体错觉，基于多感觉冲突的应用，引起身体自我意识（BSC）的变化。这已被用于研究身体所有权和自我意识相关方面的认知大脑机制。通常情况下，这样的范例采用外部被动多感官刺激，从而忽略了可能的贡献，自我产生的行动和触觉线索的身体所有权。在这篇文章中，外部和自愿的自我触摸BSC的影响进行了检查与机器人为基础的FBI范式。我们比较了经典的被动视觉触觉刺激和主动自我触摸（实验参与者对触觉刺激有一种代理感）对FBI的影响。我们使用问卷调查，跨模态一致性任务，并测量自我定位的变化来评估这些影响。结果表明，无论是同步被动视觉触觉刺激和同步主动自我触摸诱导虚幻的所有权超过一个虚拟的身体，没有显着差异的幅度。然而，由主动自我触摸引起的FBI与朝向虚拟身体的自我位置的较大漂移相关。这些结果表明，运动相关的信号所产生的自我触摸影响BSC不仅对手的所有权，而且躯干为中心的身体所有权和BSC的相关方面。
The full body illusion (FBI) is a bodily illusion based on the application of multisensory conflicts that induce changes in bodily self-consciousness (BSC). This has been used to study cognitive brain mechanisms underlying body ownership and related aspects of self-consciousness. Typically, such paradigms employ external passive multisensory stimulation, thus neglecting the possible contributions of self-generated action and haptic cues to body ownership. In this article, the effects of both external and voluntary self-touch on BSC were examined with a robotics-based FBI paradigm. We compared the effects of classical passive visuotactile stimulation and active self-touch (in which experimental participants had a sense of agency over the tactile stimulation) on the FBI. We evaluated these effects using a questionnaire, crossmodal congruency task, and measurements of changes in self-location. The results indicated that both synchronous passive visuotactile stimulation and synchronous active self-touch induced illusory ownership over a virtual body, without significant differences in their magnitudes. However, the FBI induced by active self-touch was associated with a larger drift in self-location towards the virtual body. These results show that movement-related signals arising from self-touch impact the BSC not only for hand ownership but also for torso-centered body ownership and related aspects of BSC.