For the highly intelligent, their anterior insulae and anterior cingulate cortices play bigger roles in the movement of information than in less intelligent brains.
When someone is craving a cigarette, there is a lot more activity in the posterior cingulate cortex, a major node in the default mode network of the brain.
Scientists are increasingly confident that the neurological root of the disorder is a small hook of tissue towards the front of the brain called the anterior cingulate cortex.
By reducing activity in the default mode network and posterior cingulate cortex, meditation can help diffuse that anxious, impatient, unfocused and instant gratification oriented mind that the internet helped create.