Sources of EEG activity in learning disabled children.
The sources of different EEG frequencies were studied in 25 normal children and 46 learning disabled (not otherwise specified) children between 7 and 11 years old. The EEG sources were computed using Frequency-domain Variable Resolution Electromagnetic Tomography which produces a three dimensional picture of the currents at each EEG frequency. Significant differences between groups were observed. LD children showed more theta activity (3.5 to 7.02 Hz) in the frontal lobes and control children more alpha (9.75 to 12.87 Hz) in occipital areas. These results may support the maturational lag hypothesis, as the neurobiological cause of learning deficiencies not otherwise specified.
Fernández
Thalía
T
Institute of Neurobiology, National Autonomous University of Mexico, Campus UNAM-UAQ Juriquilla, Querètaro 76230, México. thalia@servidor.unam.mx
Harmony
Thalía
T
Fernández-Bouzas
Antonio
A
Silva
Juan
J
Herrera
Wendy
W
Santiago-Rodríguez
Efraín
E
Sánchez
Liliana
L
D000513:Alpha Rhythm / Q000145:classification*; D001921:Brain / Q000503:physiopathology*; D001931:Brain Mapping / Q000379:methods*; D002648:Child; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D007859:Learning Disabilities / Q000175:diagnosis* / Q000503:physiopathology* / Q000523:psychology; D015225:Magnetoencephalography / Q000379:methods*; D008297:Male; D015999:Multivariate Analysis; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D013223:Statistics as Topic; D013826:Theta Rhythm / Q000145:classification*