This is Your Brain on No Self Control
From Science Daily
An excerpt: A study by University of Iowa neuroscientist and neuro-marketing expert William Hedgcock confirms previous studies that show self-control is a finite commodity that is depleted by use. Once the pool has dried up, we're less likely to keep our cool the next time we're faced with a situation that requires self-control.
But Hedgcock's study is the first to actually show it happening in the brain using fMRI images that scan people as they perform self-control tasks. The images show the anterior cingulate cortex (ACC) -- the part of the brain that recognizes a situation in which self-control is needed and says, "Heads up, there are multiple responses to this situation and some might not be good" -- fires with equal intensity throughout the task.
However, the dorsolateral prefrontal cortex (DLPFC) -- the part of the brain that manages self-control and says, "I really want to do the dumb thing, but I should overcome that impulse and do the smart thing" -- fires with less intensity after prior exertion of self-control.
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