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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.

Original publication

DOI

10.1016/j.neuron.2013.06.022

Type

Journal article

Journal

Neuron

Publication Date

21/08/2013

Volume

79

Pages

782 - 797

Keywords

Acoustic Stimulation, Adult, Attention, Brain, Brain Mapping, Environment, Eye Movements, Female, Humans, Image Processing, Computer-Assisted, Male, Nerve Net, Nonlinear Dynamics, Oxygen, Pattern Recognition, Visual, Photic Stimulation, Psychophysics, Rest, Signal Processing, Computer-Assisted, Time Factors, Visual Pathways, Young Adult