Sound waves vs. stroke spasticity: scientists probe how it works

This pilot study looked at how focused sound waves (shock wave therapy) reduce muscle tightness in the arm after a stroke. Twelve adults who had a stroke at least six months ago received the treatment. Researchers measured changes in muscle stiffness, nerve signals, and arm function to see whether the therapy works by altering muscle tissue or by calming overactive nerves. Understanding this could help tailor the treatment to the right patients in the future.