RFI
Stiff-person syndrome, which has forced Canadian superstar singer Celine Dion to postpone her European tour, is a very rare neurological condition that causes progressive muscle stiffness as well as muscle spasms.
Around one in a million people are estimated to have the condition, according to the US National Organization for Rare Disorders (NORD).
Symptoms develop over a matter of months or years, normally between the ages of 30 to 60, and can remain stable in some cases or get gradually worse in others.
The often painful muscle spasms last minutes or even hours and can happen randomly or be triggered by events such as loud noises, light physical contact, stress or situations requiring a heightened emotional response, NORD said.
If left untreated, the syndrome can cause problems walking leading to the use of a wheelchair, and can significantly impact a person’s ability to carry out daily tasks.
“While we’re still learning about this rare condition, we now know this is what’s been causing all of the spasms I’ve been having,” an emotional Dion said in an Instagram post on Thursday in which she also postponed or cancelled planned concerts across Europe.
“Unfortunately, the spasms affect every aspect of my daily life, sometimes causing difficulties when I walk and not allowing me to use my vocal cords to sing the way I’m used to,” she added.
