The revelation that Canadian singer Céline Dion had been diagnosed with stiff-person syndrome (SPS) placed this rare neurological disorder under the public spotlight. Little is known about the disease, which affects just one or two out of every million people. Its symptoms are painful and debilitating, and while treatment is available to lessen the impact SPS has on the mind and body, there is currently no cure for this condition that sees stiffening in the torso and limbs, along with episodes of severe muscle spasms.
But what causes stiff-person syndrome, and how is it treated? Click through to learn about the disease and its most famous victim.