Brain regions active when our minds wander may hold a key to understanding neurological disorders and even consciousness itself
• Neuroscientists have long thought that the brain’s circuits are turned off
when a person is at rest.
• Imaging experiments,however, have shown that there is a persistent level
of background activity.
• This default mode, as it is called, may be critical in
planning future actions.
• Miswiring of brain regions involved in the default mode may lead to disorders
ranging from Alzheimer’s to schizophrenia.
Imagine you are almost dozing in a lounge chair outside, with a magazine on your lap. Suddenly,a fly lands on your arm. You grab the magazine and swat at the insect. What was going on in your brain after the fly landed? And what was
going on just before?
Many neuroscientists have long assumed that much of the neural activity inside
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