Cortical dynamics during rubber hand illusion
Last modified: 2013-05-05
Abstract
Rubber hand illusion is an epoch-making phenomenon on the study about the body ownership. The neural correlates of this illusory phenomenon has been revealed by many researchers, while the information flow in the cortex related this illusion was not clear.
We recorded EEG during simultaneous presentation of visuotactile stimuli using a rubber hand with a setting inducing Rubber hand illusion, and also obtain the subjective reports for illusory feeling. Using renormalized partial directed coherence (RPDC) as an index of a cortical causality, we evaluated the information flow inducing the illusory experiences. As a result, at the low frequency band, we found the significant increase of neural connectivity between the parietal area and the other cortical areas. By correlation analysis, we found that some causalities are correlated with the rubber hand illusion and proprioceptive drift.
We recorded EEG during simultaneous presentation of visuotactile stimuli using a rubber hand with a setting inducing Rubber hand illusion, and also obtain the subjective reports for illusory feeling. Using renormalized partial directed coherence (RPDC) as an index of a cortical causality, we evaluated the information flow inducing the illusory experiences. As a result, at the low frequency band, we found the significant increase of neural connectivity between the parietal area and the other cortical areas. By correlation analysis, we found that some causalities are correlated with the rubber hand illusion and proprioceptive drift.
Keywords
EEG; causality analysis; Rubber hand illusion