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Brain-to-brain hyperclassification reveals action-specific motor mapping of observed actions in humans

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Smirnov, Dmitry
dc.contributor.author Lachat, Fanny
dc.contributor.author Peltola, Tomi
dc.contributor.author Lahnakoski, Juha
dc.contributor.author Koistinen, Olli-Pekka
dc.contributor.author Glerean, Enrico
dc.contributor.author Vehtari, Aki
dc.contributor.author Hari, Riitta
dc.contributor.author Sams, Mikko
dc.contributor.author Nummenmaa, Lauri
dc.date.accessioned 2018-02-09T10:06:39Z
dc.date.available 2018-02-09T10:06:39Z
dc.date.issued 2017-12-11
dc.identifier.citation Smirnov , D , Lachat , F , Peltola , T , Lahnakoski , J , Koistinen , O-P , Glerean , E , Vehtari , A , Hari , R , Sams , M & Nummenmaa , L 2017 , ' Brain-to-brain hyperclassification reveals action-specific motor mapping of observed actions in humans ' , PloS one , vol. 12 , no. 12 , e0189508 . https://doi.org/10.1371/journal.pone.0189508 en
dc.identifier.issn 1932-6203
dc.identifier.other PURE UUID: d816c841-294e-4a0f-9832-4b578f542b30
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/d816c841-294e-4a0f-9832-4b578f542b30
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/16792319/journal.pone.0189508.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/29998
dc.description.abstract Seeing an action may activate the corresponding action motor code in the observer. It remains unresolved whether seeing and performing an action activates similar action-specific motor codes in the observer and the actor. We used novel hyperclassification approach to reveal shared brain activation signatures of action execution and observation in interacting human subjects. In the first experiment, two "actors" performed four types of hand actions while their haemodynamic brain activations were measured with 3-T functional magnetic resonance imaging (fMRI). The actions were videotaped and shown to 15 "observers" during a second fMRI experiment. Eleven observers saw the videos of one actor, and the remaining four observers saw the videos of the other actor. In a control fMRI experiment, one of the actors performed actions with closed eyes, and five new observers viewed these actions. Bayesian canonical correlation analysis was applied to functionally realign observers' and actors' fMRI data. Hyperclassification of the seen actions was performed with Bayesian logistic regression trained on actors' data and tested with observers' data. Without the functional realignment, between-subjects accuracy was at chance level. With the realignment, the accuracy increased on average by 15 percentage points, exceeding both the chance level and the accuracy without functional realignment. The highest accuracies were observed in occipital, parietal and premotor cortices. Hyperclassification exceeded chance level also when the actor did not see her own actions. We conclude that the functional brain activation signatures underlying action execution and observation are partly shared, yet these activation signatures may be anatomically misaligned across individuals. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries PLOS ONE en
dc.relation.ispartofseries Volume 12, issue 12 en
dc.rights openAccess en
dc.title Brain-to-brain hyperclassification reveals action-specific motor mapping of observed actions in humans en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Neuroscience and Biomedical Engineering
dc.contributor.department Department of Computer Science
dc.contributor.department Department of Art en
dc.identifier.urn URN:NBN:fi:aalto-201802091495
dc.identifier.doi 10.1371/journal.pone.0189508
dc.type.version publishedVersion

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