Cognitive functions in children with myelomeningocele without hydrocephalus.

ABSTRACT

OBJECTIVE: The aim of this study was to explore the separate effects of myelomeningocele (MMC) and hydrocephalus on intelligence and neuropsychological functions in a population-based series of children. MATERIAL AND METHODS: Of the 69 children with MMC born in 1992-1999 in western Sweden, nine did not develop hydrocephalus. Eight of them participated in this study and were compared with age- and gender-matched children with MMC in combination with hydrocephalus and with controls. RESULTS: Children with only MMC had an IQ of 103 compared with 75 in those with hydrocephalus added to the MMC and they had significantly better immediate and long-term memory and executive functions. When compared with controls, they had difficulty with learning and executive functions, but when the two children with an IQ of <70 were excluded, those with only MMC performed just as well as the controls. CONCLUSION: Hydrocephalus rather than MMC in itself appeared to cause the cognitive deficits found in children with MMC.