Many people think that those who frequently multi-task (e.g. text message while listening to an Ipod, reading a newspaper, or working) and get by with it do so because they’re adept. In a study published in the Proceedings of the National Academy of Sciences Online (August 24, 2009), researchers at…

Could smoking marijuana change the way the brain works? That’s what researchers are finding. Brain imaging scans of heavy marijuana smokers have revealed changes in blood flow to parts of the brain involved in memory and attention. Researchers have also noted differences in the size and shape of the thalamus, the part of the brain that’s…