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Researchers at the Swedish medical university Karolinska Institutet have shown that the active training of the working memory brings about visible changes in the number of dopamine receptors in the human brain. The study, which is published in the prestigious journal Science, was conducted with the help of PET scanning and provides deeper insight into the complex interplay between cognition and the brain's biological structure.

Cognitive neuroscientists at the Swedish medical university Karolinska Institutet (KI) have succeeded in making subjects perceive the bodies of mannequins and other people as their own. In one of the experiments, subjects swapped bodies with other people and shook hands with themselves without illusion being broken.