Academic journal article International Journal of Child Health and Human Development

Quantitative Resting EEG in the Autistic Spectrum Disorder

Academic journal article International Journal of Child Health and Human Development

Quantitative Resting EEG in the Autistic Spectrum Disorder

Article excerpt

The EEG has not been comprehensively used to study the brain function in Autistic Spectrum Disorder (ASD) patients. Therefore, our team recently developed a specifically designed software (EEGConn) to explore brain function based on advanced algorithms to explore EEG activity. We studied a group of 14 right-handed autistic patients with age 70.3±29.32 (months) and 14 healthy subjects (66.68±29.6) with IQs over 85. EEG was digitally recorded with a frequency sample of 200 Hz. All recordings were performed with the subjects lying in a recumbent position, in eye-opened condition; EEG electrodes were attached to the scalp according to the 10-20 System. Spectral analysis, including no less than 64 seconds of EEG free of artifacts, was performed using the Welch periodogram method with a Hann window. The absolute and normalized estimations of power spectral density were calculated for the Delta (1.17-3.5 Hz), Theta (3.5-7.5Hz), Alpha (7.5 -11 Hz), Sigma (11-15 Hz), Beta (15-25 Hz), and Gamma (25-55 Hz) bands. An ANOVA test for one between factor "Group", and two within repeated measures factors: sagittal areas [SA] (anterior, central and posterior) and hemisphere (leftor right) was carried out. For absolute and normalized power values the main factor Group was statistically significant only for EEG Alpha (significant increment for controls), EEG Beta (significant increment for patients) and EEG Gamma bands (significant increment for patients). …

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