Seeing an embodied humanoid avatar move its arms can induce in the observer the illusion that its own (static) arms are moving accordingly, the kinematic signals emanating from this avatar thus being considered like those from the biological body. Here, we investigated the causal relationship between these kinaesthetic illusions and the illusion of body ownership, manipulated through visuomotor synchronisation. The results of two experiments revealed that the sense of body ownership over an avatar seen from a first-person perspective was intimately linked to visuomotor synchrony. This was not the case for kinaesthetic illusions indicating that when superimposed on the biological body, the avatar is inevitably treated at the sensorimotor level as one’s own body, whether consciously considered as such or not. The question of whether these two bodily experiences (body ownership and kinaesthetic illusion) are underpinned by distinct representations, the body image, and the body schema, is discussed.

中文翻译：

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身体所有权和动觉幻觉：不同身体意识水平的分离身体体验？


看到一个具体的人形化身移动其手臂可以让观察者产生一种错觉，即它自己的（静态）手臂也在相应地移动，因此从该化身发出的运动信号被认为与来自生物体的运动信号一样。在这里，我们研究了这些动觉错觉和通过视觉运动同步操纵的身体所有权错觉之间的因果关系。两项实验的结果表明，从第一人称视角看到的化身的身体所有权感与视觉运动同步性密切相关。动觉错觉的情况并非如此，它表明当叠加在生物体上时，化身不可避免地在感觉运动层面被视为自己的身体，无论是否有意识地认为如此。讨论了这两种身体体验（身体所有权和动觉幻觉）是否以不同的表征、身体意象和身体图式为基础的问题。