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Pubmed for Handhelds

PUBMED FOR HANDHELDS

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  • Title: Proprioceptive drift is affected by the intermanual distance rather than the distance from the body's midline in the rubber hand illusion.
    Author: Erro R, Marotta A, Fiorio M.
    Journal: Atten Percept Psychophys; 2020 Nov; 82(8):4084-4095. PubMed ID: 32914338.
    Abstract:
    In the rubber hand illusion (RHI), simultaneous brush stroking of a subject's hidden hand and a visible rubber hand induces a transient illusion of the latter to "feel like it's my hand" and a proprioceptive drift of the hidden own hand toward the rubber hand. Recent accounts of the RHI have suggested that the illusion would only occur if weighting of conflicting sensory information and their subsequent integration results in a statistically plausible compromise. In three different experiments, we investigated the role of distance between the two hands as well as their proximity to the body's midline in influencing the occurrence of the illusion. Overall, the results suggest that the illusion is abolished when placing the two hands apart, therefore increasing the mismatch between the visual and proprioceptive modality, whereas the proximity of the two hands to the body's midline plays only a minor role on the subjective report of the illusion. This might be driven by the response properties of visuotactile bimodal cells encoding the peripersonal space around the hand.
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