Abstract
Summary
Sleep EEG patterns in 17 infants with cerebral malformations (4 months to 4 years of age) were studied throughout nocturnal sleep and the following results were obtained. Seven cases evidenced normal sleep/wakefulness EEG patterns that could be classified into 6 stages. Ten cases showed abnormal sleep EEG patterns as follows: absence of sleep spindles (n=7) which included cases of absence of EEG patterns characteristic of wakefulness, NREM sleep and REM sleep (n=5), no characteristic EEG patterns of stages 1 -4 (n=1) and stages W, 1, 2 and REM (n=1) and the remaining cases with absence of spindles (n=1), and spindles with an extremely low incidence (n=2). Short sleep and long awaking times, and no delta rhythmicity during the night, were noted in 5 out of 17 subjects. A significant decrease of DQ was found in subjects with indistinguishable stages including stages W, 1, 2 and REM, as compared with those patients whose stages were all distinguishable.
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