A Hole in the Heart.

"'This is the part of the brain involved in knowing that you want something,' she said. 'When people who are not adjusting well are having these sorts of thoughts about the person, they are experiencing this reward pathway being activated. They really are craving in a way that perhaps is not allowing them or helping them adapt to the new reality.'" It's darker than you know in those complicated shadows...A new study finds that unrelenting grief works on the brain differently than the usual kind of post-traumatic depression. "The same brain system is involved in other powerful cravings, such those that afflict drug addicts and alcoholics...It's like they're addicted to the happy memories."