Joint contractures. Arthrogryposis is a rare congenital condition in which the affected child as joint contractures and muscle weakness. A joint contracture means essentially that the joint is stuck in one position. The care issues are complex, and an affected child needs to be cared for at a multi-specialty pediatric center with the appropriate expertise.
Childhood disorder. This is a rare childhood disorder that affects children's joints. The actual cause of this is poorly understood. This results in children having loss of motion of their joints and literally being frozen in place. Children's cognitive function is otherwise rarely affected.