TASK-INDUCED DEACTIVATION DOES NOT DISRUPT FUNCTIONAL COUPLING OF THE DEFAULT MODE NETWORK DURING THE MOVEMENT

Some regions of DMN remain active during the task execution. We propose TID and functional connectivity analysis under the execution of motor tasks with various complexities for DMN heterogeneity study. Motor task fMRI was done for DMN deactivation and connectivity analysis. Despite the unified pattern of brain activation across different motor tasks, deactivation pattern differ depending on the complexity of the movements and their cognitive demand. Nodes of DMN may function simultaneously in the TID and task independent regimes during the movements. Obligatory PCC involvement in TID and task independent patterns of DMN functioning supports its possible hub function.

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