December 8, 2022 3:22 pm What Is Stiff-Person Syndrome? The condition is one that has forced singer Céline Dion to cancel shows. What is the neurological disorder, and how common is it? US & World Videos 1:07 WATCH: Word War II era US bomb explodes at Japan airport 1:19 Judge: Biden's student loan forgiveness can move forward for now 1:39 George Clooney and Amal Clooney reveal their twins' favorite hobbies 1:08 Death toll from Helene climbs, hundreds still missing 2:19 Bank of America customers report widespread outages