http://www.msnbc.msn.com/id/25887680/

Dr. Lynne Taylor, a neuro-oncologist at Virginia Mason Medical Center in Seattle, said residents at the hospital are taught to check for brain tumors in patients who report having a recent car accident in which they didn't realize they struck something.

"People get spatial and visual neglect of a certain part of their bodies and they don't realize they've done what they've done," said Taylor, a fellow with the American Academy of Neurology.