National Geographic : 2017 Sep
THE ADDICTED BRAIN We’re learning more about the craving that fuels self-defeating habits— and how science could help fight it. Addiction hijacks the brain’s neural pathways. Scientists are challenging the view that it’s a moral failing and researching treatments that could offer an exit from the cycle of desire, bingeing, and withdrawal that traps tens of millions of people. Janna Raine became addicted to heroin two decades ago after taking prescription pain pills for a work injury. Last year she was living in a homeless encampment under a Seattle freeway.