Neanderthal genes may explain why some people have Chiari malformation type I, a condition in which the brain bulges out of the back of the skull.

A child in South Carolina has died after being infected with Naegleria fowleri, commonly referred to as brain-eating amoeba. State health officials confirm exposure likely came from Lake Murray the week of July 7.

Ozzy Osbourne lived with Parkinson's disease for years before his death. Here's what you need to know about the neurodegenerative disease.