Seeing Drugs as a Choice or as a Brain Anomaly. Psychiatrists debate whether the brains of abusers are malfunctioning badly enough to make their actions nonvolitional. Brain changes in heavy chronic drug users are easy to demonstrate, but when do they cross the line to being considered responsible for alterations in behavior, or worthy of being called a disease? Ramifications are legal and fiscal as well as medical, of course. [New York Times]