http://www.msnbc.msn.com/id/24245365/We've all goofed up and flubbed up things we've previously done time and again.
It turns out the root of these brain farts may be a special kind of abnormal brain activity that begins up to 30 seconds before a mistake even happens.
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"We thought initially that it would be quite remarkable if we were to find abnormal activity six or so seconds ahead," said researcher Tom Eichele, a neuroscientist at the University of Bergen in Norway. "That the entire process spans across a much longer timescale was quite astonishing and spooked us, such that we checked this finding over and over again."
One set of brain regions that is normally active only when a person is awake and relaxed began firing up — in other words, it's as if the brain started resting. At the same time, another group of brain regions that is usually lively when a person is sustaining effort on a task began toning down. After people made and detected any mistakes, the abnormal behavior went away.