Spasticity is a disorder of muscle tone associated with damage to the central nervous system (the brain, brain stem and spinal cord): it usually appears a few weeks after the onset of a neurological injury. Spasm is a sudden and involuntary contraction of one or more muscles.
Whether it is after a stroke, a multiple sclerosis attack or after a spinal cord injury, it is often necessary to fight against spasticity, which can be functionally disturbing on the one hand (making walking more difficult, preventing the opening of the hand, sleep disturbance, generating pain…) but can also lead to musculo-tendinous and articular complications (retractions, joint ankylosis…).