Early development of synchrony in cortical activations in the human

Neuroscience
N KoolenSampsa Vanhatalo

Abstract

Early intermittent cortical activity is thought to play a crucial role in the growth of neuronal network development, and large scale brain networks are known to provide the basis for higher brain functions. Yet, the early development of the large scale synchrony in cortical activations is unknown. Here, we tested the hypothesis that the early intermittent cortical activations seen in the human scalp EEG show a clear developmental course during the last trimester of pregnancy, the period of intensive growth of cortico-cortical connections. We recorded scalp EEG from altogether 22 premature infants at post-menstrual age between 30 and 44 weeks, and the early cortical synchrony was quantified using recently introduced activation synchrony index (ASI). The developmental correlations of ASI were computed for individual EEG signals as well as anatomically and mathematically defined spatial subgroups. We report two main findings. First, we observed a robust and statistically significant increase in ASI in all cortical areas. Second, there were significant spatial gradients in the synchrony in fronto-occipital and left-to-right directions. These findings provide evidence that early cortical activity is increasingly synchronized across...Continue Reading

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Citations

Jun 20, 2016·Sleep Medicine Reviews·Jan WerthRonald M Aarts
Jul 16, 2016·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·A DereymaekerG Naulaers
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Apr 8, 2020·Frontiers in Human Neuroscience·Viviana MarchiSampsa Vanhatalo
May 16, 2019·Arquivos de neuro-psiquiatria·Tainã Maria Alves de SousaRosana Maria Tristão
Sep 30, 2021·Cerebral Cortex·Anton TokarievSampsa Vanhatalo

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Methods Mentioned

BETA
PMA

Software Mentioned

BrainWave

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