Head motion has been shown to be associated with distinct changes in local and long-range rsfMRI connectivity, and the temporal scrubbing based on motion parameters has been proposed to remove such “motion-induced” artefacts. Here, we showed that scrubbing arousal-related time points resulted in a similar but stronger change on the rsfMRI connectivity than the motion-based scrubbing. Moreover, the effect of the motion-based scrubbing can be completely removed by retaining the part of scrubbed time points related to arousal changes. The findings suggest that arousal modulations may mediate the association between the motion and rsfMRI connectivity.
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