Sound waves ease stroke Survivors' painful arm stiffness

This small, completed study aimed to understand how a treatment called focal extracorporeal shock wave therapy works to reduce arm stiffness (spasticity) after a stroke. Researchers tested the therapy on 12 stroke survivors to see if it works by changing the muscle tissue itself or by calming overactive nerve signals in the spinal cord. The goal was to learn how the treatment works so doctors can use it more effectively to improve movement and reduce pain.