The Default Mode Network
Marcus Raichle · 2001
"The brain doesn't go idle at rest — a specific network becomes more active the moment you stop focusing on a task, and it burns a disproportionate share of the brain's total energy doing it."
Raichle kept seeing the same brain regions go quiet exactly when a task started, scan after scan. In 2001 he named what they were doing instead: the brain's default mode.
Brain imaging kept showing regions — medial prefrontal, posterior cingulate, lateral parietal cortex — that quiet down during external tasks, then reactivate when attention turns inward: mind-wandering, remembering, imagining the future. Raichle's 2001 paper named this baseline activity the 'default mode,' overturning the assumption that rest meant low brain activity — the network burns roughly 20% of the brain's energy doing 'nothing.'
What did Raichle's 2001 discovery of the default mode network overturn?
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The explanation above is written with AI assistance. These are the originals — go to them to check it.
- Default mode networkWikipedia
- A default mode of brain function (2001, PNAS)paper
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