Emergence of mature cortical activity in wakefulness and sleep in healthy preterm and full-term infants

Sleep
Kimberley WhiteheadLorenzo Fabrizi

Abstract

Cortical activity patterns develop rapidly over the equivalent of the last trimester of gestation, in parallel with the establishment of sleep architecture. However, the emergence of mature cortical activity in wakefulness compared with sleep states in healthy preterm infants is poorly understood. To investigate whether the cortical activity has a different developmental profile in each sleep-wake state, we recorded 11-channels electroencephalography (EEG), electrooculography (EOG), and respiratory movement for 1 hr from 115 infants 34 to 43 weeks-corrected age, with 0.5-17 days of postnatal age. We characterized the trajectory of δ, θ, and α-β oscillations in wakefulness, rapid eye movement (REM) sleep, and non-REM sleep by calculating the power spectrum of the EEG, averaged across artifact-free epochs. δ-Oscillations in wakefulness and REM sleep decrease with corrected age, particularly in the temporal region, but not in non-REM sleep. θ-Oscillations increase with corrected age in sleep, especially non-REM sleep, but not in wakefulness. On the other hand, α-β oscillations decrease predominantly with postnatal age, independently of sleep-wake state, particularly in the occipital region. The developmental trajectory of δ and θ ...Continue Reading

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Citations

Oct 28, 2019·Sleep·María Corsi-CabreraThalia Harmony
Aug 10, 2020·Sleep·Anastasis GeorgoulasKimberley Whitehead
Jul 21, 2021·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Tuomas KoskelaKimberley Whitehead
Mar 19, 2021·Brain : a Journal of Neurology·Michael EyreA David Edwards

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