DEVELOPMENTAL MEDICINE & CHILD NEUROLOGY The Dyskinesia Impairment Scale: a new instrument to measuredystonia and choreoathetosis in dyskinetic cerebral palsy ELEGAST MONBALIU1,2 ELS ORTIBUS3 JOS DE CAT3,4 BERNARD DAN5,6 LIEVE HEYRMAN1 PETER PRINZIE2,7 PAUL DE COCK8,9 HILDE FEYS1 1 Department of Rehabilitation Sciences, Katholieke Universiteit Leuven, Leuven. 2 Dominiek Savio Institute, DC GID(t)S Gits. 3 Department of Paediatric Neurology, UniversityHospitals Leuven, Leuven. 4 Clinical Motion Analysis Laboratory Leuven, University Hospital Pellenberg, Leuven. 5 Department of Neurology, Hpital Universitaire des EnfantsReine Fabiola, Brussels. 6 Faculty of Medicine, Universit libre de Bruxelles, Brussels, Belgium. 7 Department of Child and Adolescent Studies, Utrecht University, Utrecht, theNetherlands. 8 Centre for Developmental Disabilities, University Hospitals Leuven, Leuven. 9 Faculty of Medicine, Katholieke Universiteit Leuven, Leuven, Belgium.