Celine Dion’s Sister Claims Singer Has Lost Control of Muscles Due to Her Stiff-Person Syndrome

Celine Dion‘s sister, Claudette Dion, claims her sister has lost control of her muscles due to her Stiff-Person Syndrome — a progressive neurological disorder that affects the brain and the spinal cord, according to the National Institute of Neurological Disorders and Stroke. Celine shared her Stiff-Person Syndrome diagnosis with the world last December since the disorder affected …