title: Natural scenes viewing alters the dynamics of functional connectivity in the human brain.
abstract: Spontaneous fMRI fluctuations are organized in large-scale spatiotemporal structures, or resting-state networks (RSN). However, it is unknown how task performance affects RSN dynamics. We use MEG to measure slow (∼0.1 Hz) coherent fluctuations of band-limited power (BLP), a robust correlate of RSN, during rest and movie observation and compare them to fMRI-RSN. BLP correlation, especially in α band, dropped in multiple RSN during movie although overall topography was maintained. Variability of power correlation increased in visual occipital cortex, and transient decrements corresponded to scenes perceived as "event boundaries." Additionally, stronger task-dependent interactions developed between vision and language networks in θ and β bands, and default and language networks in γ band. The topography of fMRI connectivity and relative changes induced by the movie were well matched to MEG. We conclude that resting-state and task network interactions are clearly different in the frequency domain despite maintenance of underlying network topography.
authors.affiliation: Department of Neuroscience and Imaging, G. d'Annunzio University Chieti-Pescara, Chieti 66013, Italy. v.betti@unich.it
authors.forename: Viviana
authors.initials: V
authors.lastname: Betti
authors.forename: Stefania
authors.initials: S
authors.lastname: Della Penna
authors.forename: Francesco
authors.initials: F
authors.lastname: de Pasquale
authors.forename: Dante
authors.initials: D
authors.lastname: Mantini
authors.forename: Laura
authors.initials: L
authors.lastname: Marzetti
authors.forename: Gian Luca
authors.initials: GL
authors.lastname: Romani
authors.forename: Maurizio
authors.initials: M
authors.lastname: Corbetta
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001288:Attention / Q000502:physiology*; D001921:Brain / Q000098:blood supply / Q000502:physiology*; D001931:Brain Mapping; D004777:Environment; D005133:Eye Movements; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D009415:Nerve Net / Q000098:blood supply / Q000502:physiology; D017711:Nonlinear Dynamics; D010100:Oxygen / Q000097:blood; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation; D011601:Psychophysics; D012146:Rest; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors; D014795:Visual Pathways / Q000098:blood supply / Q000502:physiology*; D055815:Young Adult
chemical_list: D010100:Oxygen
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