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Preterm EEG: A Multimodal Neurophysiological Protocol
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Structural damage in early preterm brain changes the electric resting state networks.

Amir Omidvarnia1, Marjo Metsäranta2, Aulikki Lano3

  • 1The University of Queensland Centre for Clinical Research, Royal Brisbane & Women's Hospital, Brisbane, Australia.

Neuroimage
|July 13, 2015
PubMed
Summary

Preterm brain hemorrhages disrupt functional coordination in newborn brain networks, impacting long-range cortical activity. This may link early brain injury to later neurodevelopmental issues.

Keywords:
Brain lesionDevelopmentFunctional connectivityIntraventricular haemorrhageNeonatal EEGResting state network

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Area of Science:

  • Neuroscience
  • Developmental Neuroscience
  • Computational Neuroscience

Background:

  • Newborn cortical activity exhibits robust functional bimodality, essential for coordinating brain network growth.
  • Acute structural brain lesions, such as preterm hemorrhages, may acutely affect this large-scale cortical coordination.
  • Understanding these effects is crucial for linking early injury to later neurodevelopmental outcomes.

Purpose of the Study:

  • To investigate the acute effects of structural brain lesions on large-scale cortical coordination in preterm infants.
  • To examine spatial cortical correlations in band-specific amplitudes during high and low amplitude periods.
  • To correlate graph theoretical measures with neurodevelopmental outcomes at two years.

Main Methods:

  • Electroencephalography (EEG) recordings from preterm infants with and without hemorrhagic brain lesions.
  • Analysis of spatial cortical correlations in band-specific amplitudes within high and low amplitude regimes.
  • Graph theoretical analysis to assess network properties like weight dispersion and clustering coefficient.

Main Results:

  • Functional bimodality in cortical activity is a genuine physiological characteristic, not an artifact.
  • Newborns with brain lesions showed weaker long-range amplitude correlations, particularly during high amplitude periods.
  • Graph theoretical analysis revealed significantly larger weight dispersion in newborns with brain lesions.
  • Lower clustering coefficient and weight dispersion correlated with better neurodevelopmental outcomes at two years.

Conclusions:

  • Common preterm brain hemorrhages induce diffuse alterations in functional long-range cortical correlations.
  • These changes in high mode network activity may provide a mechanistic link between early brain lesions and subsequent neurocognitive deficits.
  • The findings highlight the sensitivity of early brain network development to structural injury.