QEEG spectral and coherence assessment of autistic children in three different experimental conditions.
We studied autistics by quantitative EEG spectral and coherence analysis during three experimental conditions: basal, watching a cartoon with audio (V-A), and with muted audio band (VwA). Significant reductions were found for the absolute power spectral density (PSD) in the central region for delta and theta, and in the posterior region for sigma and beta bands, lateralized to the right hemisphere. When comparing VwA versus the V-A in the midline regions, we found significant decrements of absolute PSD for delta, theta and alpha, and increments for the beta and gamma bands. In autistics, VwA versus V-A tended to show lower coherence values in the right hemisphere. An impairment of visual and auditory sensory integration in autistics might explain our results.
Department of Clinical Neurophysiology, Institute of Neurology and Neurosurgery, 29 y D, Vedado, 10400, Havana, La Habana, Cuba, braind@infomed.sld.cu.
Calixto
C
Machado
Mario
M
Estévez
Gerry
G
Leisman
Robert
R
Melillo
Rafael
R
Rodríguez
Phillip
P
DeFina
Adrián
A
Hernández
Jesús
J
Pérez-Nellar
Rolando
R
Naranjo
Mauricio
M
Chinchilla
Nicolás
N
Garófalo
José
J
Vargas
Carlos
C
Beltrán
D000161:Acoustic Stimulation; D001307:Auditory Perception / Q000502:physiology*; D001321:Autistic Disorder / Q000503:physiopathology*; D001767:Blinking / Q000502:physiology; D058256:Brain Waves / Q000502:physiology*; D016022:Case-Control Studies; D002675:Child, Preschool; D004569:Electroencephalography; D005149:Facial Expression; D005260:Female; D006801:Humans; D008297:Male; D010775:Photic Stimulation; D014796:Visual Perception / Q000502:physiology*