Article,

Delta and spindle components in compressed spectral array during nocturnal sleep in infants with cerebral palsy.

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Electroencephalogr Clin Neurophysiol, 64 (6): 493--500 (December 1986)

Abstract

The correlations between the delta and spindle components in compressed spectral array in 21 mentally retarded children with cerebral palsy (CP) (from 4 months to 5 years of age) and 32 reference mentally retarded children of no abnormality with the exception of psychomotor retardation (from 4 months to 12 years of age) were studied throughout nocturnal sleep. In 11 (52\%) out of 21 CP cases and 27 (84\%) out of 32 reference cases, periodic changes of delta and spindle rhythm powers were noted in sleep EEG (group A). In 5 (24\%) other cases in CP and 5 (16\%) reference cases delta but not spindle rhythm powers were found (group B), and in the remaining 5 (24\%) CP cases neither delta nor spindle rhythm powers were found throughout nocturnal sleep (groups C). A significant decrease in the developmental quotient (DQ) was found in group C as compared with group A in both CP and reference cases. Moreover, a significant decrease in DQ was also found in group B as compared with group A of reference cases.

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