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Vittorio Iacovella: paper accepted for poster presentation at PRNI 2014
Vittorio Iacovella's paper entitled "Functional Hyperalignment of Resting State FMRI Sessions Driven by Autonomic Activity" has been accepted for presentation at the Pattern Recognition in Neuroimaging conference. The conference will take place in Tubingen from June 3rd to June 6th 2014.
In the paper, the authors propose a method for intersubject functional alignment with the resting state data. Extraction of between-participants common patterns of brain activity is currently one of the most debated challenges in cognitive neuroscience. So far, by applying functional hyperalignment method (see Haxby, 2011) to functional magnetic resonance imaging (FMRI) data, relevant results have been obtained on datasets where different participants underwent the same stimulations. This challenge is however less explored when participants undergo resting state sessions: there, it is hard to characterize whether different participants experienced similar brain states. The authors propose to combine autonomic activity information with FMRI acquisitions of resting state to characterize between-participants synchrony levels and drive the extraction of functional hyperalignment transformations. They show that common patterns between participants are modulated by functional alignment using time-segments characterized by different synchrony. The authors study this effect on different brain areas, showing that modulations are not homogeneous, and suggest that different brain areas carry different contributions to between-participants common patterns.