Distribution of slow-wave EEG activity across the night in developing infants

Adults show distinctive patterns of slow-wave (delta) electroencephalogram (EEG) activity across each sleep cycle and across the night. We examined the ontogeny of slow-wave EEG patterning in infants. Twelve-hour overnight physiological recordings were obtained from 25 normal infants at 1 week and 1...

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Bibliographic Details
Published in:Sleep (New York, N.Y.) N.Y.), 1994-06, Vol.17 (4), p.316-322
Main Authors: SCHECHTMAN, V. L, HARPER, R. K, HARPER, R. M
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cerebral Cortex - physiology
Child Development - physiology
Circadian Rhythm - physiology
Delta Rhythm
Electroencephalography
Female
Follow-Up Studies
Fundamental and applied biological sciences. Psychology
Humans
Infant, Newborn - physiology
Longitudinal Studies
Male
Polysomnography
Reference Values
Signal Processing, Computer-Assisted
Sleep Stages - physiology
Sleep. Vigilance
Vertebrates: nervous system and sense organs
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Summary:Adults show distinctive patterns of slow-wave (delta) electroencephalogram (EEG) activity across each sleep cycle and across the night. We examined the ontogeny of slow-wave EEG patterning in infants. Twelve-hour overnight physiological recordings were obtained from 25 normal infants at 1 week and 1, 2, 3, 4 and 6 months of age. The EEG activity was band-pass filtered, leaving primarily activity ranging from 0.5 to 2.5 Hz (the delta frequency). Filtered EEG traces were full-wave rectified and integrated over 1-minute periods. Nighttime recordings were divided into four 3-hour segments, beginning at sleep onset, and the mean integrated delta activity during quiet sleep was determined for each segment of the night. In addition, patterns of delta activity across extended periods of quiet sleep (15 minutes or longer) were determined. Beginning at 2 months of age, integrated delta activity declined significantly over the night. Moreover, beginning at 3 months of age, delta activity increased significantly over individual periods of quiet sleep; in neonates up to 1 month of age, delta activity decreased significantly within epochs of quiet sleep. Beginning at 2-3 months of age, infants show patterns of delta activity similar to those found in adults.
ISSN:0161-8105
1550-9109
DOI:10.1093/sleep/17.4.316