Some simple precautions and activities can help keep your mind sharp and your brain healthy throughout your life, an expert says. Genes and chance certainly play a role in memory loss, brain tumors, strokes and other brain disorders, Dr. Keith L. Black, chairman of the department of neurosurgery at Cedars-Sinai Medical Center in Los Angeles and director of the Maxine Dunitz Neurosurgical Institute, said in a news release. But brain health isn’t totally out of your control. There are ways to reduce your risks of both diseases and injury to the brain, Black said, including: