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33. GENETIC ASPECT OF CEREBRAL PALSY IN ICELAND

Recent experience from a field study comprising 429 Swedish cerebral palsied children born 1959-68 (Acta Paediat. Scand. 62:1973) brought about an expanded investigation for the further analysis of certain trends within the changing panorama of cp-syndromes. In addition to the already demonstrated and significantly decreasing number of prematurely born diplegic babies appearing from the middle of 1960’s, the following preliminary conclusions could be drawn. Spastic heiniplegic syndromes seem to have diminished, but it has hitherto not been possible to demonstrate statistical significance. The small percentage (2-5 O/o) of severe spastic tetraplegic syndromes has remained unaltered, most of these being of prenatal developmental origin. There was a gradual disappearance of pure choreoathetosis due to kernicterus in Swedish babies born between 1950--60, and no single case has been diagnosed in Gothenburg since that time. Dyskinetic syndromes due to perinatal asphyxia have remained quantitatively unchanged during the last 15 years in spite of all obstetric and neonatologic efforts. However, a qualitative improvement might have occurred with a smaller number of very severely damaged children appearing today. The incidence of congenital ataxic syndromes has also remained unchanged through the years, while postnatally acquired ataxia and ataxic diplegia due to expanding hydrocephalus seem to have decreased parallel to the institution of modern active shunt procedures.