From part- to whole-body ownership in the multisensory brain.
2011 (English)In: Current Biology, ISSN 0960-9822, E-ISSN 1879-0445, Vol. 21, no 13, 1118-1122 p.Article in journal (Refereed) Published
The question of how we experience ownership of an entire body distinct from the external world is a fundamental problem in psychology and neuroscience [1-6]. Earlier studies suggest that integration of visual, tactile, and proprioceptive information in multisensory areas [7-11] mediates self-attribution of single limbs. However, it is still unknown how ownership of individual body parts translates into the unitary experience of owning a whole body. Here, we used a "body-swap" illusion , in which people experienced an artificial body to be their own, in combination with functional magnetic resonance imaging to reveal a coupling between the experience of full-body ownership and neural responses in bilateral ventral premotor and left intraparietal cortices, and left putamen. Importantly, activity in the ventral premotor cortex reflected the construction of ownership of a whole body from the parts, because it was stronger when the stimulated body part was attached to a body, was present irrespective of whether the illusion was triggered by stimulation of the hand or the abdomen, and displayed multivoxel patterns carrying information about full-body ownership. These findings suggest that the unitary experience of owning an entire body is produced by neuronal populations that integrate multisensory information across body segments.
Place, publisher, year, edition, pages
Cambridge, MA, United States: Cell Press , 2011. Vol. 21, no 13, 1118-1122 p.
IdentifiersURN: urn:nbn:se:liu:diva-126211DOI: 10.1016/j.cub.2011.05.022ISI: 000292805400019PubMedID: 21683596OAI: oai:DiVA.org:liu-126211DiVA: diva2:912993