Gabrielle Gifford's brain injury

"The precise nature of Giffords' wound has not been made public. What is known is that a 9 mm bullet fired point-blank ... passed directly through the brain ...

That part of the brain controls vision, language, and the ability to move the right side of the body. All of these functions are at risk, notes Keith L. Black, MD.

Understand more about how the brain works ... http://www.webmd.com/brain/news/20110109/gabrielle-giffords-brain-injury-faq