# Spectral Power Analysis of Delta Waves in Neonatal Electroencephalography: A Tool for Assessing Brain Maturation and Injury

## TL;DR

This study shows that analyzing delta waves in EEG can help assess brain development and injury in newborns, improving early diagnosis and treatment.

## Contribution

The study introduces delta wave spectral power analysis as a novel method for evaluating neonatal brain maturation and injury.

## Key findings

- Delta wave spectral power shows significant maturation-related changes in preterm infants.
- Lower-frequency delta wave suppression correlates with the severity of brain injury.
- Spectral power analysis complements conventional methods like aEEG in evaluating brain function.

## Abstract

Recent advances in neonatal care have improved survival rates of preterm infants but highlighted the persistent challenge of neurological impairments. This study focuses on delta wave analysis in neonatal electroencephalography (EEG) as a marker for brain maturation and injury. Using quantitative EEG methods, including spectral power analysis, we examined 399 EEG recordings from infants with gestational ages spanning 23-42 weeks. Results demonstrated significant maturation-related changes in delta wave spectral power across cortical regions, particularly in lower-frequency bands. Suppression of delta wave power correlated with visual assessments of brain injury severity. These findings suggest that delta wave spectral power analysis enhances the precision of brain function evaluation, providing a valuable complement to conventional methods such as amplitude-integrated EEG (aEEG). This approach holds potential for improving early diagnosis and guiding therapeutic interventions for neonatal brain injuries.