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Brain Waves

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Brain waves are electrical signals generated by the neurons in the brain, which are regularly monitored to measure mental activities. Brain waves and their frequency ranges can be measured using an electroencephalogram or EEG. There are four main types of brain waves, each with distinct characteristics:
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Exploring neurodevelopment through oscillatory and aperiodic EEG activity: methodological and clinical consideration.

Stefania Petri1,2, Helene Vitali1, Claudio Campus1

  • 1Italian Institute of Technology, U-VIP Unit for Visually Impaired People, Genoa, Italy.

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|September 18, 2025
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Summary

Spectral analysis of electroencephalography (EEG) reveals oscillatory and aperiodic activity crucial for understanding brain development. This review explores their developmental changes and clinical significance in children.

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EEG spectral analysisaperiodicchildrenneurodevelopmentoscillatory

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Area of Science:

  • Neuroscience
  • Developmental Neuroscience
  • Computational Neuroscience

Background:

  • Electroencephalography (EEG) is vital for studying brain development due to its non-invasive nature and temporal resolution.
  • EEG spectral analysis includes oscillatory and aperiodic components, with aperiodic activity gaining recognition for its role in brain function.
  • Understanding these spectral features is key to characterizing typical and atypical brain development.

Purpose of the Study:

  • To review recent evidence on EEG spectral features (oscillatory and aperiodic activity) in early brain development.
  • To focus on developmental trajectories and clinical significance of these spectral features.
  • To guide researchers and clinicians in utilizing EEG spectral analysis for developmental neuroscience.

Main Methods:

  • This narrative review synthesizes current literature on EEG spectral analysis in early development.
  • It examines methodological considerations for analyzing oscillatory and aperiodic EEG components.
  • The review covers developmental changes and alterations in children with developmental disorders.

Main Results:

  • Aperiodic EEG activity is increasingly recognized as important alongside oscillatory activity for understanding brain function.
  • Significant developmental changes occur in both oscillatory and aperiodic EEG spectral features during early childhood.
  • Alterations in these spectral features are observed in children with various developmental disorders.

Conclusions:

  • Both oscillatory and aperiodic EEG components are complementary and essential for characterizing brain function in early development.
  • Spectral EEG analysis offers valuable insights into typical and atypical neurodevelopment.
  • This review provides a foundation for advancing EEG-based clinical tools for developmental neuroscience.