THURSDAY, July 20, 2023 (HealthDay News) -- Every week, a group of dancers meets in Chicago. Together, they follow a series of movements under the guidance of an instructor.They flex, and reach, and point as Carly Liegel, community engagement program coordinator for the Joffrey Ballet, leads them through a series of movements with their arms and then their legs.But these aren’t professionals, and they aren’t your average dancers. Each one has Parkinson’s disease, a progressive brain disorder with no known cure that can cause uncontrollable movements and balance issues.In conjunction with Northwestern Medicine, the Joffrey Ballet started offering "Dancing with Parkinson’s" this summer, exploring ballet, jazz, tap and modern dance, as well as a little improvisation, to tunes...