The sense of body ownership relaxes temporal constraints for multisensory integration.
The sense of body ownership relaxes temporal constraints for multisensory integration.
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DOI：
10.1038/srep30628
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发表时间：
2016-08-03
影响因子：
4.6
通讯作者：
Slater M
中科院分区：
文献类型：
--
作者：
Maselli A;Kilteni K;López-Moliner J;Slater M
关于身体所有权错觉的实验工作表明，简单的多感官操作可以产生假肢作为自己身体一部分的错觉体验。这项工作强调了自身身体感知如何依赖于多感觉整合产生的可塑性大脑表征。这种表征的灵活性反映在这些错觉期间观察到的生理状态和感知处理的短期调制中。在这里，我们探讨的影响，所有权错觉的时间维度的多感觉整合。我们表明，在幻觉，时间窗口整合触摸物理身体上看到的触摸虚拟身体表示，增加与视觉事件的集成，看到接近，但从虚拟身体分离。我们发现，这种效果是由所有权错觉介导的。最重要的是，视觉触觉整合的时间窗口与参与者对拥有虚拟身体和触摸与之接触的物体的虚幻体验的评分呈正相关。我们的研究结果证实了最近提出的虚幻身体所有权的因果推理机制。作为一种新奇，他们表明，来自真实的和虚假身体的刺激之间随之而来的虚幻因果联系放松了对身体信号整合的限制。
Experimental work on body ownership illusions showed how simple multisensory manipulation can generate the illusory experience of an artificial limb as being part of the own-body. This work highlighted how own-body perception relies on a plastic brain representation emerging from multisensory integration. The flexibility of this representation is reflected in the short-term modulations of physiological states and perceptual processing observed during these illusions. Here, we explore the impact of ownership illusions on the temporal dimension of multisensory integration. We show that, during the illusion, the temporal window for integrating touch on the physical body with touch seen on a virtual body representation, increases with respect to integration with visual events seen close but separated from the virtual body. We show that this effect is mediated by the ownership illusion. Crucially, the temporal window for visuotactile integration was positively correlated with participants’ scores rating the illusory experience of owning the virtual body and touching the object seen in contact with it. Our results corroborate the recently proposed causal inference mechanism for illusory body ownership. As a novelty, they show that the ensuing illusory causal binding between stimuli from the real and fake body relaxes constraints for the integration of bodily signals.