Abstract
In functional magnetic resonance imaging, the brain's response to experimental cognitive tasks is usually assumed to be independent of endogenous oscillations. To test this assumption, we measured fractal scaling of fMRI time-series before and after a working memory task. Prolonged and task difficulty-related changes in post-task 'resting' data suggest that brain dynamics recover slowly from cognitive effort, contrary to the reflexive model that background oscillations are independent of task performance.
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Suckling, J., Barnes, A. & Bullmore, E. Endogenous human brain dynamics recover slowly following cognitive effort. Nat Prec (2008). https://doi.org/10.1038/npre.2008.2665.1
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DOI: https://doi.org/10.1038/npre.2008.2665.1