Sensory Processing and the Rubber Hand Illusion—An Evoked Potentials Study

Daniel Zeller · Vladimir Litvak A · Karl John Friston · Joseph Claßen

117 citations0/0 files storedJournal of Cognitive Neuroscience

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Multisensory perception and integration Virtual Reality Applications and Impacts Tactile and Sensory Interactions

Abstract

The rubber hand illusion (RHI) paradigm--in which illusory bodily ownership is induced by synchronous tactile stimulation of a participant's (hidden) hand and a (visible) surrogate--allows one to investigate how the brain resolves conflicting multisensory evidence during perceptual inference. To identify the functional anatomy of the RHI, we used multichannel EEG, acquired under three conditions of tactile stimulation. Evoked potentials were averaged from EEG signals registered to the timing of brushstrokes to the participant's hand. The participant's hand was stroked either in the absence of an artificial hand (REAL) or synchronously with an artificial hand, which either lay in an anatomically plausible (CONGRUENT) or impossible (INCONGRUENT) position. The illusion was reliably elicited in the CONGRUENT condition. For right-hand stimulation, significant differences between conditions emerged at the sensor level around 55 msec after the brushstroke at left frontal and right parietal electrodes. Response amplitudes were smaller for illusory (CONGRUENT) compared with nonillusory (INCONGRUENT and REAL) conditions in the contralateral perirolandic region (pre- and postcentral gyri), superior and inferior parietal lobule, whereas veridical perception of the artificial hand (INCONGRUENT) amplified responses at a scalp region overlying the contralateral postcentral gyrus and inferior parietal lobule compared with the remaining two conditions. Left-hand stimulation produced similar contralateral patterns. These results are consistent with predictive coding models of multisensory integration and may reflect the attenuation of somatosensory precision that is required to resolve perceptual hypotheses about conflicting multisensory input.

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References

2002Vision Modulates Somatosensory Cortical Processing 2013Disintegration of Multisensory Signals from the Real Hand Reduces Default Limb Self-Attribution: An fMRI Study 2013The Invisible Hand Illusion: Multisensory Integration Leads to the Embodiment of a Discrete Volume of Empty Space 2003Anatomical mechanisms and functional implications of multisensory convergence in early cortical processing

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2021Precision control for a flexible body representation 2016Dynamic causal modeling of touch-evoked potentials in the rubber hand illusion 2016The sense of body ownership relaxes temporal constraints for multisensory integration 2018Balancing body ownership: Visual capture of proprioception and affectivity during vestibular stimulation 2017Affective Touch Enhances Self-Face Recognition During Multisensory Integration

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