School of Psychology and Institute of Neuroscience, Trinity College Dublin, Ireland.
School of Psychology and Institute of Neuroscience, Trinity College Dublin, Ireland.
Neurosci Lett. 2020 Feb 16;720:134756. doi: 10.1016/j.neulet.2020.134756. Epub 2020 Jan 13.
Susceptibility to the Rubber Hand Illusion (RHI) demonstrates that body ownership can be modulated by visuotactile inputs. In contrast to body-like images, other objects cannot be embodied suggesting that crossmodal interactions on body ownership are based on a 'goodness-of-fit' mechanism relative to one's own body. However, it is not clear whether visual self-recognition influences susceptibility to the RHI, although evidence for individual differences in the perceptual body image on the RHI suggests that this may be the case. We investigated the role of self-recognition on the subjective experience of the RHI and measured proprioceptive drift and onset time of the RHI between two groups, one with the ability to identify an image of their own hand and the other without this ability. A typical RHI response was found overall with no group difference in the subjective experience of the RHI. However, a larger proprioceptive drift and an earlier onset time for the RHI was found for the non-recognisers than the self-recognition group. Our findings provide evidence for a link between a visual representation of one's own body in long-term memory and plasticity of the body representation.
易感性橡胶手错觉 (RHI) 表明，身体所有权可以通过视觉触觉输入进行调节。与类似身体的图像不同，其他物体不能被体现，这表明身体所有权的跨模态相互作用是基于与自己身体的“适合度”机制。然而，目前尚不清楚视觉自我识别是否会影响对 RHI 的易感性，尽管 RHI 上的感知身体图像存在个体差异的证据表明情况可能如此。我们研究了自我识别对 RHI 主观体验的作用，并在两组之间测量了本体感觉漂移和 RHI 的起始时间，一组具有识别自己手的图像的能力，另一组没有这种能力。总体上发现了典型的 RHI 反应，两组在 RHI 的主观体验上没有差异。然而，对于无法识别者，RHI 的本体感觉漂移较大，起始时间较早。我们的研究结果为长期记忆中自身身体的视觉表象与身体表象的可塑性之间的联系提供了证据。
