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Topology highlights mesoscopic functional equivalence between imagery and perception

Esther Ibáñez-Marcelo, Lisa Campioni, Angkoon Phinyomark, Giovanni Petri, Enrica L. Santarcangelo
doi: https://doi.org/10.1101/268383
Esther Ibáñez-Marcelo
1ISI Foundation, Turin, Italy
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Lisa Campioni
2Dept. of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
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Angkoon Phinyomark
3Institute of Biomedical Engineering, University of New Brunswick, Fredericton, Canada
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Giovanni Petri
1ISI Foundation, Turin, Italy
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Enrica L. Santarcangelo
2Dept. of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
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ABSTRACT

The functional equivalence between mental images and perception or motion has been proposed on the basis of neuroimaging evidence of large spatially overlapping activations between real and imagined sensori-motor conditions. However, similar local activation patterns do not imply the same mesoscopic integration of brain regions active during imagery and perception or action. Here we present the first EEG evidence of topological equivalence between functional network organization at intermediate and global scales during tasks. We show that the degree of functional equivalence varies in the population and is associated with different magnitudes in the restructuring of the functional connectivity between imagery and real tasks. In particular, changes observed during imagery with respect to basal conditions account for the cognitive effort experienced during imagery, and subjects characterized by stronger functional equivalence exhibit smaller topological deviations in the imagination tasks performed after real tasks, thus showing learning effects. Altogether, our findings point to different sensori-cognitive information processing in the subjects showing different functional equivalence. We anticipate our results to be a starting point for a novel dynamical description of functional equivalence, which will be relevant for socio-cognitive theories of embodiment and cognitive formulations of how different selves emerge from neurophysiological assets.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted February 21, 2018.
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Topology highlights mesoscopic functional equivalence between imagery and perception
Esther Ibáñez-Marcelo, Lisa Campioni, Angkoon Phinyomark, Giovanni Petri, Enrica L. Santarcangelo
bioRxiv 268383; doi: https://doi.org/10.1101/268383
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Topology highlights mesoscopic functional equivalence between imagery and perception
Esther Ibáñez-Marcelo, Lisa Campioni, Angkoon Phinyomark, Giovanni Petri, Enrica L. Santarcangelo
bioRxiv 268383; doi: https://doi.org/10.1101/268383

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