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However, this classification is based on sagittal kinematics and fails to consider important abnormalities in the transverse plane. Using three-dimensional gait analysis, we studied the incidence of transverse-plane deformity and gait abnormality in 17 children with group IV hemiplegia according to Winters et al before and after multilevel orthopaedic surgery. <\/jats:p><jats:p> We found that internal rotation of the hip and pelvic retraction were consistent abnormalities of gait in group-IV hemiplegia. A programme of multilevel surgery resulted in predictable improvement in gait and posture, including pelvic retraction. In group IV hemiplegia pelvic retraction appeared in part to be a compensating mechanism to control foot progression in the presence of medial femoral torsion. Correction of this torsion can improve gait symmetry and function. <\/jats:p>","DOI":"10.1302\/0301-620x.87b4.15525","type":"journal-article","created":{"date-parts":[[2005,3,25]],"date-time":"2005-03-25T23:38:29Z","timestamp":1111793909000},"page":"548-555","source":"Crossref","is-referenced-by-count":28,"title":["Multilevel orthopaedic surgery in group IV spastic hemiplegia"],"prefix":"10.1302","volume":"87-B","author":[{"given":"F.","family":"Dobson","sequence":"first","affiliation":[{"name":"School of Physiotherapy, La Trobe University, Victoria 3086, Australia."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"H. 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