Evaluating the Effects of an Electrical Stimulator on Improving the Walking Ability of Children With Cerebral Palsy

\*Inclusion Criteria\* CP Group: * Age 7-18 * Diagnosis of spastic diplegic cerebral palsy (CP) * GMFCS level I-III (be able to walk with or without assistive devices) * MIGR \< 40% femoral head covering in acetabulum * Crouch, equinus, or jump gait * At least 0° passive dorsiflexion range of motion (ROM) * Sufficient visuoperceptual, cognitive, and communication skills * Seizure-free or well-controlled seizures * No other neurological or musculoskeletal disorders (e.g. dystonia, severe scoliosis, hip instability * Ability to travel to the University of Nebraska at Omaha two times * Ability to communicate pain or discomfort * Ability to obtain child assent and obtain parent/guardian consent Healthy adults (control) group: * Adults aged 20 to 40 * Adults with good physical health * Adults with the ability to follow verbal instructions * Adults with the ability to walk on a treadmill for 15 minutes * No orthopedic surgery on the lower limb within the past 3 months \*Exclusion Criteria\* CP Group: * Diagnosis of athetoid or ataxic cerebral palsy (CP) * Scoliosis with primary curve \> 49% * Spinal fusions extending into the pelvis * Lower Extremity (LE) joint instability or dislocation * Severe tactile hypersensitivity * LE botulinum injections in the past 6 mo * Implanted medical device contraindicative of functional electrical stimulation (FES) * Pregnancy * Severe LE spasticity (Modified Ashworth Scale score of 4 or greater) * History of pulmonary disease limiting exerc…