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Endogenous human brain dynamics recover slowly following cognitive effort

John Suckling¹, Anna Barnes¹ & Ed Bullmore¹

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1. University of Cambridge, Psychiatry

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Date:

Received 15 December 2008 15:22 UTC; Posted 22 December 2008

Subjects:

Neuroscience

Tags:

• neuroimaging
• cognitive effort
• fMRI
• brain
• cognition

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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This document is licensed to the public under the Creative Commons Attribution 3.0 License

How to cite this document:

Suckling, John, Barnes, Anna, and Bullmore, Ed. Endogenous human brain dynamics recover slowly following cognitive effort. Available from Nature Precedings <http://dx.doi.org/10.1038/npre.2008.2665.1> (2008)

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