title: Invited commentary.
authors.affiliation: Center for Neurorehabilitation, Sargent College of Health and Rehabilitation Sciences, Boston University, 635 Commonwealth Ave, Boston, MA 02215, USA. wagenaar@bu.edu
authors.forename: Robert C
authors.initials: RC
authors.lastname: Wagenaar
mesh_terms: D001696:Biomechanical Phenomena; D002547:Cerebral Palsy / Q000503:physiopathology* / Q000534:rehabilitation; D002648:Child; D002675:Child, Preschool; D004576:Electromyography; D056228:Feedback, Sensory; D020233:Gait Disorders, Neurologic / Q000503:physiopathology* / Q000534:rehabilitation; D006615:Hip / Q000503:physiopathology; D006801:Humans; D018482:Muscle, Skeletal / Q000503:physiopathology*; D026741:Physical Therapy Modalities; D011187:Posture / Q000502:physiology; D013909:Thorax / Q000503:physiopathology