Rest-task modulation of fMRI-derived global signal topography is mediated by transient co-activation patterns

Jianfeng Zhang, Zirui Huang, Shankar Tumati & Georg Northoff
Recent resting-state fMRI studies have revealed that the global signal (GS) exhibits a non-uniform spatial distribution across the gray matter. Whether this topography is informative remains largely unknown. We therefore tested rest-task modulation of global signal topography by analyzing static global signal correlation and dynamic co-activation patterns in a large sample of fMRI dataset (n=837) from the Human Connectome Project. The GS topography in the resting-state and in seven different tasks was first measured by...
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