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Updated: Oct 16, 2025

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Phase-Based Cortical Synchrony Is Affected by Prematurity.

Pauliina Yrjölä1,2,3, Susanna Stjerna1,3,4, J Matias Palva2,3,5

  • 1Department of Clinical Neurophysiology, BABA Center, Children's Hospital, Helsinki University Hospital and University of Helsinki, Helsinki, 00029 HUS, Finland.

Cerebral Cortex (New York, N.Y. : 1991)
|October 20, 2021
PubMed
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This summary is machine-generated.

Prematurity impacts brain connectivity in infants, affecting higher cognitive functions. These brain network differences, identified via electroencephalography, predict clinical outcomes, offering potential biomarkers for neurodevelopmental risks.

Area of Science:

  • Neuroscience
  • Developmental Neuroscience
  • Computational Neuroscience

Background:

  • Inter-areal synchronization via phase-phase correlations (PPCs) of cortical oscillations is crucial for higher neurocognitive functions.
  • Prematurity is a significant risk factor impacting neurodevelopment and cognitive abilities.

Purpose of the Study:

  • To investigate the effects of prematurity on brain-wide cortical PPC networks at term-equivalent age.
  • To identify sleep state- and frequency-specific alterations in PPC networks associated with prematurity.
  • To explore the predictive value of PPC network synchronization for clinical outcomes in preterm infants.

Main Methods:

  • Electroencephalography (EEG) was used to record brain activity in preterm infants and healthy controls.
  • Analysis focused on brain-wide cortical phase-phase correlations (PPCs) at term-equivalent age.
Keywords:
brain networksneonatal EEGneurodevelopmentphase couplingpreterm infant

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  • Comparison of PPC network characteristics between preterm and control groups across different sleep states and frequencies.

    • Main Results:

    • Prematurity significantly altered brain-wide cortical PPC networks in a sleep state-specific and frequency-selective manner.
    • Differences in synchronization strength were observed in brain-wide connections between preterm and control infants.
    • The strength of synchronization within these networks predicted clinical outcomes in preterm infants.

    Conclusions:

    • Prematurity profoundly affects cortical phase-phase correlation networks, impacting neurocognitive functions.
    • These findings highlight prematurity-induced alterations in brain connectivity as potential early functional biomarkers.
    • The identified biomarkers may aid in clinical and translational studies for assessing neurodevelopmental compromise following early neonatal adversity.