Developmental transition of EEG spectra to alpha band in a sample of children with developmental disabilities.
Developmental transition of EEG spectra to alpha band of 14 children with developmental disabilities (from 7 yr. and 3 mo. to 16 yr. and 1 mo. of age at the first EEG recording: M= 13.2, SD=2.6; 6 girls and 8 boys) was studied by auto-power spectrum analysis longitudinally. The results showed the mean age (14.1 yr. to 14.8 yr. in the four regions of the frontal, central, parietal, and occipital regions) for subjects and their mean frequency (4.2 Hz to 4.7 Hz in the 4 regions) at which EEG shift started from theta band, and those means (15.1 yr. to 15.7 yr. and 9.5 Hz to 9.6 Hz in the 4 regions) at which EEG shift reached the alpha band. Prior EEG research on healthy children has shown that approximately 10 years of age is critical for developmental transition of EEG spectra to alpha frequencies. It is suggested that the present data showed a delay of this critical age for this sample of children with developmental disabilities relative to 10 years for healthy children reported by Katada, et al. and Benninger, et al.
Shibagaki
Masamitsu
M
Faculty of Human Development, University of Toyama, 3190 Gofuku, Toyama City, Toyama Prefecture 930-8555, Japan. shibagak@edu.u-toyama.ac.jp
Mizuhashi
Megumi
M
Miyajima
Kana
K
Yoshie
Yu
Y
Hiraki
Chiaki
C
Yamada
Mari
M
Yamashita
Eriko
E
Yamada
Ai
A
D000293:Adolescent; D000513:Alpha Rhythm; D002648:Child; D002658:Developmental Disabilities; D004569:Electroencephalography / Q000295:instrumentation*; D005260:Female; D006801:Humans; D008297:Male