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Patients with cerebral palsy should be referred for gait analysis when they have three-dimensional multijoint or complex abnormalities of gait that complicate the treatment plan. Gait analysis should be performed before aggressive interventions to aide in the evaluation and appropriateness of the selected procedure(s). Clinical gait analysis can also be used to evaluate outcomes of interventions or quantify changes over time and to determine muscle activity prior to orthopedic interventions that transfer muscles.