Below is an interesting TED Talk given by Thad Polk. It delves into aging and how the brain starts rejuggling it's functions. He goes through real time MRI examinations of the brain as different age groups are being tested. The results he has found by these MRI experiments are fascinating. I have read where some people who are older feel that their awareness and their understanding increased with age and I wonder if this is what lies behind that claim. Mimsey "Dr. Thad Polk has been a member of the University of Michigan psychology faculty since 1996. His lab uses functional MRI, computational modeling, and behavioral experimentation to study the neural architecture of cognition, including how it is affected by aging, by experience, and by genetics. He has taught over 6,000 UM students over the past 20 years. In 2006, he was named an Arthur F. Thurnau Professor in recognition of outstanding contributions to undergraduate education, and in 2012 Princeton Review included him on its list of the Best 300 Professors in the US."