Inside your noggin at least two conflicting trends may be going on. One is a good thing.
A University of California Los Angeles team found searching the web stimulated centres in the brain that controlled decision-making and complex reasoning.
The researchers say this might even help to counteract the age-related physiological changes that cause the brain to slow down. [More]
Another is a not-so-good thing. Maybe.
Aging shrinks your brain, about 2% per decade. Alcoholism — regular heavy drinking — can accelerate this slightly. But even the alcoholics had brains just 1.5% smaller than the abstainers in the study published in the Archives of Neurology. [More]
This is not the way this report was widely summarized by the media, but seems to me to be the fairest conclusion.
Look at it this way: the more your surf, the more you can drink.