World's Oldest Practicing Doctor Offers Advice on Staying Mentally Sharp

Clinical Relevance: There are steps you can take to keep your brain active into old age

• Howard Tucker, MD, a neurologist of Cleveland, Ohio, is the oldest practicing doctor in the world.
• At more than 100-years-old, he has been in medicine for more than 75 years. He also became a lawyer at the age of 67.
• He offers five thoughts on lifestyle habits that can help hold off cognitive decline.