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Development of the brain's default mode network from wakefulness to slow wave sleep.
TLDR
Functional connectivity analysis of rs-fMRI series obtained from 25 healthy participants found significant changes in DMN/ACN integrity throughout the NREM sleep, and it is submitted that preserved corticocortical synchronization could represent a prerequisite for maintaining internal and external awareness.
Development of a Large-Scale Functional Brain Network during Human Non-Rapid Eye Movement Sleep
TLDR
The hypothesis that changes in consciousness in the descent to sleep are subserved by reduced thalamocortical connectivity at sleep onset and a breakdown of general connectivity in slow-wave sleep is supported, with both processes limiting the capacity of the brain to integrate information across functional modules.
Functional microstates within human REM sleep: first evidence from fMRI of a thalamocortical network specific for phasic REM periods
TLDR
A thalamocortical network including limbic and parahippocampal areas specifically active during phasic REM periods is reported, with the brain acting as a functionally isolated and closed intrinsic loop within general REM sleep.
Brain activation and hypothalamic functional connectivity during human non-rapid eye movement sleep: an EEG/fMRI study.
TLDR
A specific pattern of decreased brain activity during sleep is described and it is suggested that this pattern must be synchronized for establishing and maintaining sleep.
Sleep Spindles and Hippocampal Functional Connectivity in Human NREM Sleep
TLDR
Increased connectivity between HF and neocortical regions in sleep stage 2 suggests an increased capacity for possible global information transfer, while connectivity in slow-wave sleep is reflecting a functional system optimal for segregated information reprocessing.
Neural correlates of dream lucidity obtained from contrasting lucid versus non-lucid REM sleep: a combined EEG/fMRI case study.
TLDR
In line with recent EEG data, lucid dreaming was associated with a reactivation of areas which are normally deactivated during REM sleep, which can explain the recovery of reflective cognitive capabilities that are the hallmark of lucid dreaming.
Heritability of Sleep Electroencephalogram
Dreamed Movement Elicits Activation in the Sensorimotor Cortex
Increased sleep pressure reduces resting state functional connectivity
TLDR
Increased sleep pressure is reflected in reduced fc of main DMN and ACN nodes during rest, which has implications for understanding perceptual and cognitive changes after sleep deprivation and are relevant to clinical studies on conditions in which increased sleep propensity is present.
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