(FORBES) — There’s been a lot of controversy over the concept of Internet Addiction Disorder (IAD), especially as the new DSM-V prepares to launch. Some feel that there’s little evidence to warrant IAD as being recognized as an actual disorder. But others do. Earlier research has found some changes in the brain of people who are hooked on the Web, and a new study shows reductions in volume of certain areas of the brain and in its the white matter – the highways of connection between brain cells – of young people who are addicted to the Internet. What’s interesting is that these brain changes mirror the ones in people who are addicted to other kinds of things, like heroin, for example.