Neuroscientists have traced our habit-making behaviors to a part of the brain called the basal ganglia, which also plays a key role in the development of emotions, memories and pattern recognition. Decisions, meanwhile, are made in a different part of the brain called the prefrontal cortex. But as soon as a behavior becomes automatic, the decision-making part of your brain goes into a sleep mode of sorts.
“In fact, the brain starts working less and less,” says Duhigg. “The brain can almost completely shut down. … And this is a real advantage, because it means you have all of this mental activity you can devote to something else.”
Read the full article at – NPR