- Sleep Deprivation a Big Drain on the Brain
- Not Getting Enough Shut-Eye? You Have Plenty of Company
- TV, Video Games, Books and Sports Taking Toll on Sleep
An aneurysm happens when the wall of a blood vessel becomes too thin and bulges out -- sometimes so much it bursts -- causing permanent brain damage.
An experimental treatment has helped three paralyzed men walk again through its ability to stimulate the spinal cord.