Concussions and brain contusions

Concussions and brain contusions

               Here's a wiki link on concussions:  http://en.wikipedia.org/wiki/Concussion

               Here's  a wiki link on brain contusions:  http://en.wikipedia.org/wiki/Brain_contusion

               Here's a link on the death report for the actress Natasha Richardson:  http://www.webmd.com/brain/news/20090319/natasha-richardson-dies-of-epidural-hematoma