The GMFCS, MACS and CFCS are all tools used by therapists and researchers to help classify the functional capabilities of individuals with CP. This research article provides evidence of their stability over time.
Though the initial insult or injury to the brain that causes cerebral palsy is non-progressive, aging with cerebral palsy and lack of physical activity during critical periods of development can impact biologic and metabolic function for adults with cerebral palsy.
"Cerebral palsy is primarily a motor impairment so it's really important to look at what the child’s motor function is. Are they developing on the trajectory of a child who has cerebral palsy or are they developing as we would expect a baby to develop? "