Correlation between delta and spindle components in compressed spectral array during nocturnal sleep in mentally retarded children
Shibagaki, M.; Kiyono, S.; Takeuchi, T.
Pediatric Neuroscience 13(1): 9-12
1987
ISSN/ISBN: 0255-7975 PMID: 3684816 Document Number: 299329
The correlation between the delta and spindle components in compressed spectral array in 96 mentally retarded children (from 3 months to 12 years of age) was studied throughout nocturnal sleep. in 57 (59.4%, group A) of 96 subjects, periodic changes of delta and spindle rhythm powers were noted in sleep EEG. In 29 subjects (30.2% group B), delta but not spindle rhythm powers were found, and in the remaining 10 subjects (10.4%, group C) neither delta nor spindle rhythm powers were found throughout nocturnal sleep. A significant increase in abnormal clinical EEG was found in groups B and C as compared with group A. A significant decrease in the developmental quotient (DQ) was found in groups B and C as compared with group A. A significant decrease in DQ was also found in group C as compared with group B.