Workaholics, shopaholics, compulsive exercisers: Where do we draw the line on addiction?
It's Martin Luther King Jr.'s birthday, and Hans Breiter, director of the Motivation and Emotion Neuroscience Center at Massachusetts General Hospital, has the day off. Sort of. He's sitting in his home art studio, gluing together a statue that broke soon after his 9-year-old son made it. Meanwhile, with his cellphone kinked against his neck, Breiter is fielding call after call, discussing the intricacies of neuroscience with people he couldn't squeeze into his hectic weekday schedule.