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Up to one third of the epilepsy population consists of children with cryptogenic localization related epilepsy
Unfortunately, the effect of CLRE on the development is still unclear. Behavioral and academic problems have been reported, but no conclusive study concerning the impact of CLRE on neuropsychological functioning is yet published. This study was a systematic cross-sectional open clinical and nonrandomized investigation, which included 68 children with CLRE. Several neuropsychological tests were analyzed and age-related normative values were used as reference. Differences between CLRE and reference values were tested with Paired-Samples t-tests.
Z scores were computed to compare the different neuropsychological tests and to inspect whether a characteristic neuropsychological profile exists for CLRE. The Independent-Samples t-test was used to explore which epilepsy factors (seizure type, seizure frequency, age at onset, duration of epilepsy, and drug load) were influencing the cognitive profile of CLRE. There seems to be a characteristic cognitive profile for children with CLRE; children with CLRE experience cognitive difficulties on a wide range of areas-in particular, alertness, mental speed, and memory.
Seizure type, seizure frequency, duration of epilepsy, and drug load do not influence this neuropsychological profile. Age at onset was an important risk factor; the earlier the age at onset, the worse the cognitive performance. In spite of the influence of age at onset, the revealed profile can be seen as a stable, independent of temporary factors, neuropsychological profile for children with CLRE.