Recently it became possible to watch this kind of Web use rewire the brain. In 2008 Gary Small, the head of UCLA’s Memory and Aging Research Center, was the first to document changes in the brain as a result of even moderate Internet use. He rounded up 24 people, half of them experienced Web users, half of them newbies, and he passed them each through a brain scanner. The difference was striking, with the Web users displaying fundamentally altered prefrontal cortexes. But the real surprise was what happened next. The novices went away for a week, and were asked to spend a total of five hours online and then return for another scan. “The naive subjects had already rewired their brains,” he later wrote, musing darkly about what might happen when we spend more time online.
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