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  Patronage of the Polish Society of Audiology and Phoniatrics

vol 12. no 1. March 2013  

 Original articles
Evaluation of auditory event-related potentials (ERPs) in children with the familial dyslexia
Barbara Maciejewska, Bożena Wiskirska-Woźnica, Piotr Świdziński, Michał Michalak

Introduction. Neuronal functions that occur during processing
of auditory stimuli and language information may be captured
by recording auditory event-related potentials. Specific language
disorders are often observed in dyslexic children with a positive
family history.
Aim. To evaluate the auditory event-related potentials (ERPs:
MMN and P300) in children with the familial dyslexia.
Materials and methods. The study group comprised ten
children (5 pairs of siblings) aged 7-18 selected from among 66
dyslexics. The diagnosis of dyslexia was in each case confirmed
by the opinion of psychological/pedagogical outpatient clinic
experts. The set of hearing tests and recording of P300 and
MMN were performed.
Results. All subjects had abnormal ERPs – (missing potentials
or their abnormal latencies, suggesting disturbed auditory processing
at normal hearing thresholds. No evident similarities
were observed between siblings.
Conclusions. Abnormal ERPs (missing potentials or longer
latency periods) could be the result of auditory processing
disorders in dislexics. Widely differing P300/MMN latencies
observed in dyslexic children in combination with varying severity
of auditory function abnormalities noted in the tests show
that significant differences may occur in the severity of dyslexia
between the members of the same family.

keywords: dysleksja rozwojowa, dzieci, słuchowe potencjały poznawcze, MMN, P300, developmental dyslexia, children, auditory event-related

pages: from 34 to 41

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