What is spasticity characterized by?

Spasticity is characterized by an involuntary increase in muscle tone, which occurs due to abnormal reflex activity commonly seen in conditions affecting the nervous system, such as brain injuries, multiple sclerosis, or cerebral palsy. This increase in muscle tone leads to stiffness and difficulty in controlling movements, resulting in exaggerated muscle contractions and resistance to passive movement. The primary issue in spasticity is not just the tightness or rigidity of the muscle, but rather the overall alteration in neuromuscular function that contributes to muscle control and coordination challenges. This understanding is crucial for therapeutic approaches that may include physical therapy or medications aimed at reducing spasticity to improve movement and function in affected individuals.