On a snowy morning in 2010, Jolene Morton headed to work early, thinking she would be safer with fewer cars on the roads. Shortly after arriving, she started slurring her words while talking on the phone and then she dropped the receiver. In a flash, everything went blank. “All I saw in my head was a dark room with dust bunnies,” Morton says. She struggled to speak as her supervisor helped her lie down on the floor. Morton, at 33, had suffered a stroke, long considered a rarity in someone so young. … Nina Solenski, an associate professor of neurology at the University of Vir...