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Academia Mexicana de Neurología, A.C.

2006, Number 6

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Rev Mex Neuroci 2006; 7 (6)

Evaluation of the paroxysmal activity effects on cognitive processing in non epileptic children with reading difficulties

Morgade FRM, Pérez AMC, Alvarez AA, Díaz CL

Language: Spanish
References: 42
Page: 536-544
PDF size: 114.75 Kb.


ABSTRACT

Introduction: Previous studies have reported a high incidence of paroxysmal activity in the electroencephalogram (EEG) of non epileptic learning disabled children. Objectives: In this work the possible influence of paroxysmal EEG activity on cognitive processing was evaluated. Material and methods: The sample was composed by 17 schoolchildren with reading learning disabilities (DSM IV). Each child was evaluated by means of three continuo performance tasks (semantic, phonologic and color categorization) presented as computer video games. During the performance of each task, simultaneous digital EEG in 8 derivations was recorded. Results: In most evaluated children (16/17, 94.11%) the paroxysmal activity was associated with an intermittent disruption of the cognitive processing, which was evidenced by an increased rate of errors and/or a significant modification of reaction time. This cognitive disruption was more frequent in the semantic and phonologic categorization tasks. It seems to be related with the nature of the psychological processes underlying the task and not with the difficulty of its performance. Conclusion: A disruption in the cognitive pro-cessing in non epileptic children with reading difficulties produced by paroxysmal EEG activity, similar to Transient Cognitive Impairment described in epileptic patients, was confirm. The specificity of the psychological tasks suggests that the Transient Cognitive Impairment may have a causal role in the learning problems of these children.


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