The sleeping brain's connectivity and family environment: characterizing sleep EEG coherence in an infant cohort.

Markovic, Andjela; Schoch, Sarah F; Huber, Reto; Kohler, Malcolm; Kurth, Salome (2023). The sleeping brain's connectivity and family environment: characterizing sleep EEG coherence in an infant cohort. Scientific Reports, 13(1), p. 2055. Nature Publishing Group 10.1038/s41598-023-29129-3

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Brain connectivity closely reflects brain function and behavior. Sleep EEG coherence, a measure of brain's connectivity during sleep, undergoes pronounced changes across development under the influence of environmental factors. Yet, the determinants of the developing brain's sleep EEG coherence from the child's family environment remain unknown. After characterizing high-density sleep EEG coherence in 31 healthy 6-month-old infants by detecting strongly synchronized clusters through a data-driven approach, we examined the association of sleep EEG coherence from these clusters with factors from the infant's family environment. Clusters with greatest coherence were observed over the frontal lobe. Higher delta coherence over the left frontal cortex was found in infants sleeping in their parents' room, while infants sleeping in a room shared with their sibling(s) showed greater delta coherence over the central parts of the frontal cortex, suggesting a link between local brain connectivity and co-sleeping. Finally, lower occipital delta coherence was associated with maternal anxiety regarding their infant's sleep. These interesting links between sleep EEG coherence and family factors have the potential to serve in early health interventions as a new set of targets from the child's immediate environment.

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