Auditory event-related potentials in poor readers

Author(s): Harmony, T., Rodriguez, M., Reyes, A., Yanez, G., Fernandez, T., Galan, L., Silva, J., FernandezBouzas, A., Rodriguez, H., Guerrero, V., Marosi, E.

Journal/Book: Int J Psychophysiol. 2000; 36: PO Box 211, 1000 AE Amsterdam, Netherlands. Elsevier Science Bv. 11-23.

Abstract: Although poor readers (PR) are considered the major group among reading-disabled children, there are not event-related potentials (ERP) studies reported of PR on the subject. In this study, attentional and memory processes were studied in an auditory oddball task in PR and normal controls. ERP to auditory stimuli were recorded in 19 leads of the 10/20 system, using linked earlobes as references, in 20 normal children (10 female) and 20 PR (10 female) of the same age(10-12 years old). Two pure tones (1000 and 3000 Hz) were used in an oddball paradigm. No significant differences were observed in the amplitudes and latencies of N100 between the groups. However, N200 to frequent stimuli and P200 to both frequent and infrequent stimuli were of higher amplitude in poor readers than in normal children. There were no differences between groups in the latency and amplitude of P300. The results suggest that PR use more attentional resources in the components occurring before P300 to both frequent and infrequent stimuli than the normal children, and this finding is particularly marked for PR girls.

Note: Article Bernal J, Univ Nacl Autonoma Mexico, ENEP Iztacala, Lab Neurometria Proy Neurociencias, Manuel Fernando Soto 68, Col Constituc Republ, Mexico City, DF, MEXICO

Keyword(s): P300; auditory event-related potentials; poor readers; reading disabilities; sex differences; DEVELOPMENTAL DYSLEXIA; WORKING-MEMORY; BRAIN POTENTIALS; CHILDREN; ATTENTION; DYSFUNCTIONS; ADULTS; BOYS; P300; DISABILITIES

Zurück | Weiter