Short-term Spinal Stimulation Effects in Cerebral Palsy

Inclusion Criteria: Individuals who: * have a diagnosis of spastic cerebral palsy or high likelihood of CP diagnosis * are 4-65 years of age * have spasticity in lower-extremity muscles * are at a functional Gross Motor Function Classification System (GMFCS) Level I-III * can walk for at least 10 minutes with/without support * can understand and follow simple directions * have a stable medical condition, as reported by the caregiver/parent Exclusion Criteria: Individuals who: * who have had lower-extremity surgery or injury in the prior 12 months * have had botulinum toxin injections in the prior 3 months * have had selective dorsal rhizotomy (SDR) in the past * have uncontrolled seizures * have significant cardiovascular or musculoskeletal disease that would prevent full participation * are dependent on ventilation support * have implanted stimulator (e.g. epidural stimulator, vagus nerve stimulator, pacemaker, cochlear implant, etc) or drug delivery device (e.g. baclofen pump) * have established osteoporosis and taking medication for osteoporosis treatment. * have rheumatic diseases (rheumatoid arthritis, systemic lupus erythematosus, etc.) * have active cancer * have received stem cell injections into the spinal cord