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Status: Unchecked ×Keyword: circadian rhythm ×Clear all

2 claims from 1 paper

1. Neuroscience › Functional Brain Connectivity Studies

   Time of day is associated with paradoxical reductions in global signal fluctuation and functional connectivity

   Orbán, Kong, Li, Chee and Yeo · PLoS Biology · 2020

   In about 900 people scanned at different times of day, global brain signal fluctuation and functional connectivity decreased with time of day, in ways not easily explained by arousal or physiological artefacts.

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   1. UncheckedIn resting-state brain scans taken between 8 AM and 10 PM, global signal fluctuation fell steadily as the day went on, rather than following an arousal pattern.“Instead, we observed a cumulative decrease in GS fluctuation as the day progressed.”
   2. UncheckedIn this fMRI study, the drop in brain functional connectivity across the day was larger than its links with behaviour such as fluid intelligence.“The magnitude of decrease was significantly stronger than associations between functional connectivity and behaviour (e.g., fluid intelligence).”