Evidence suggests that the extent of the illusion was also correlated with the degree of muscle activity onset in the right arm as measured by EMG during this period that the arm was rotating, for the synchronous but not the asynchronous condition. After 5 min of stimulation the virtual arm rotated. A control experiment with asynchronous tapping was carried out with a different set of 20 male participants who did not experience the illusion. An experiment with 21 male participants showed displacement of ownership towards the virtual hand, as illustrated by questionnaire responses and proprioceptive drift.

We report an illusion that is invoked through tactile stimulation on a person’s hidden real right hand with synchronous virtual visual stimulation on an aligned 3D stereo virtual arm projecting horizontally out of their shoulder. Here we demonstrate that a virtual limb can be made to feel part of your body if appropriate multisensory correlations are provided. The integration of the human brain with computers is an interesting new area of applied neuroscience, where one application is replacement of a person’s real body by a virtual representation.

Brain games illusion confusion