By its definition, cerebral palsy is not progressive, which means that the injury to the brain does not get worse over time. The symptoms of cerebral palsy may, however, appear to change as a child matures. This is because of the abnormal signals in the brain that cause differences in tone (such as spasticity). A muscle with abnormal tone may not stretch and grow in the same way as a "typical" muscle. This may result in the muscle getting tighter as the child grows, making movement more difficult.
Adults with cerebral palsy may experience increased difficulty with mobility as they age as well, due to the effects of tone differences, muscle stiffness, and increased difficulty building and maintaining muscle mass. It is not uncommon for someone who was able to walk without equipment to choose to use a cane or a wheelchair for long distances when they are older. Depending upon the person and the degree of their impairment, these slow changes may begin in their 20s or 30s. Some of these problems may be respond to an individualized exercise program that strengthens muscles, increases cardiorespiratory endurance or increases muscle flexibility. The Center for Cerebral Palsy’s inter-disciplinary team can evaluate you and determine if your problems are amenable to therapy or other intervention to improve your quality of life.
However, while it is well-known that adults with cerebral palsy may experience the signs and symptoms of aging earlier than the unaffected population, a rapid change in muscle strength, sensation or overall function is not a sign of CP and should be evaluated promptly by a physician.