This Is Your Brain on Google [review of iBrain: Surviving the Technological Alteration of the Modern Mind (Small, G. and Vorgan, G.; 2008)]

Psychiatrist and neuroscientist Gary Small, of the University of California at Los Angeles, invented the first brain scan that showed physical evidence of brain aging and Alzheimer's disease in living patients. He's since focused his research on young and old brains, revealing that technological overexposure causes significant changes in neural circuitry.