Makes me think of boxing, for some reason...

A single concussion may increase risk of Parkinson's disease

People who have been diagnosed with a mild concussion, or mild traumatic brain injury, may have a 56 percent increased risk of developing Parkinson's disease, according to a study published in the April 18, 2018, online issue of Neurology®, the medical journal of the American Academy of Neurology.

"Previous research has shown a strong link between moderate to severe traumatic brain injury and an increased risk of developing Parkinson's disease but the research on mild traumatic brain injury has not been conclusive," said senior study author Kristine Yaffe, MD, of the University of California, San Francisco, the San Francisco Veterans Affairs Medical Center, and a member of the American Academy of Neurology. "Our research looked a very large population of U.S. veterans who had experienced either mild, moderate or severe traumatic brain injury in an effort to find an answer to whether a mild traumatic brain injury can put someone at risk."

Moderate to severe traumatic brain injury was defined as a loss of consciousness for more than 30 minutes, alteration of consciousness of more than 24 hours or amnesia for more than 24 hours. Mild traumatic brain injury was defined as loss of consciousness for zero to 30 minutes, alteration of consciousness of a moment to 24 hours or amnesia for zero to 24 hours.

Article may be read here.