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Infant Auditory Processing and Event-related Brain Oscillations
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Touch Modulates Gamma-Band Network Dynamics in the Infant Brain.

Silvia Polver1,2, Margaret Addabbo3, Chiara Turati4,5

  • 1HUN-REN Institute of Cognitive Neuroscience and Psychology, Research Centre for Natural Sciences, Budapest, Hungary.

Developmental Psychobiology
|April 1, 2026
PubMed
Summary
This summary is machine-generated.

Infants

Keywords:
EEGaffective touchbrain networksdevelopmentgamma bandsensorimotor

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Infant Research

Background:

  • Touch is crucial for infant development, influencing social, emotional, and cognitive skills.
  • Previous studies used artificial stimuli, not reflecting real-world touch dynamics.

Purpose of the Study:

  • Investigate neural networks in 8-month-old infants processing naturalistic felt and observed touch.
  • Utilize ecologically valid tactile interactions to study early sensory processing.

Main Methods:

  • Recorded electroencephalography (EEG) data from infants during naturalistic touch interactions.
  • Analyzed gamma-band activity and connectivity patterns in response to felt and observed touch.
  • Included a control condition with observed failed contact to assess expectancy violation.

Main Results:

  • Felt touch triggered widespread gamma-band activity in sensory and higher-order cortical areas, indicating integration.
  • Observed touch activated a localized somatosensory network with distinct gamma connectivity, suggesting self-other differentiation.
  • Observed failed contact increased frontal and temporal activity, possibly due to expectancy violation.

Conclusions:

  • Naturalistic touch significantly shapes infant neural architecture, particularly in sensorimotor and social-cognitive domains.
  • Gamma oscillations are key markers for sensorimotor processing and developing intersubjective awareness in infants.
  • Analyzing multiple frequency bands offers deeper insights into infant mirroring and neural development.