title: Correlation between integrated delta and spindle components during nocturnal sleep in mentally retarded children.
abstract: The correlation between the integrated delta and spindle components in 81 mentally retarded children (from 3 months to 12 years of age) was studied throughout nocturnal sleep. In 57 (70%, Group A) out of 81 subjects, periodic changes of delta and spindle rhythm powers were noted in the sleep EEG. In 17 subjects (21%, Group B), delta and no-spindle rhythm powers were found, and in the remaining 7 (9%, Group C) no-delta and no-spindle rhythm powers were found throughout nocturnal sleep. A significant increase in abnormal clinical EEGs was found in groups B and C as compared to group A. A significant decrease in DQ was found in groups B and C as compared to group A. A significant decrease in DQ was also found in group C as compared to group B.
mesh_terms: D002648:Child; D002675:Child, Preschool; D003700:Delta Rhythm; D004569:Electroencephalography; D005260:Female; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000503:physiopathology*; D008297:Male; D012890:Sleep / Q000502:physiology*