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By taking advantage of a 'body swap' illusion, researchers at Karolinska Institutet have captured the brain regions involved in one of the most fundamental aspects of self-awareness: how we recognize our bodies as our own, distinct from others and from the outside world. The findings, reported in the journal Current Biology, may have important medical and industrial applications.

Imagine shrinking to the size of a doll in your sleep. When you wake up, will you perceive yourself as tiny or the world as being populated by giants? Researchers at Karolinska Institutet may have found the answer.