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Related Experiment Video

Updated: Jun 21, 2025

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Intrinsic Infant Hippocampal Function Supports Inhibitory Processing.

Anika Guha1, Sharon K Hunter1, Kristina T Legget1,2

  • 1Department of Psychiatry, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.

Developmental Psychobiology
|July 16, 2024
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Summary
This summary is machine-generated.

Early brain development in infants shows that higher right hippocampus activity is linked to better sensory gating, a key inhibitory process. This suggests the hippocampus may be crucial for early identification of neurodevelopmental disorder risks.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Brain Imaging

Background:

  • Impaired cerebral inhibition is a hallmark of neurodevelopmental disorders.
  • The hippocampus is vital for adult inhibitory functions and undergoes rapid development in infancy.
  • Hippocampal function in early development is a potential indicator for inhibitory dysfunction.

Purpose of the Study:

  • To investigate the relationship between hippocampal activity and sensory gating in early infancy.
  • To determine if hippocampal function in the early postnatal period correlates with inhibitory processing.
  • To explore the hippocampus as a candidate region for early identification of neurodevelopmental pathologies.

Main Methods:

  • Resting-state functional magnetic resonance imaging (fMRI) measured hippocampal activity (ALFFs, fractional ALFF) in 18 infants (4-20 weeks old).
  • Electroencephalography (EEG) assessed sensory gating using a paired-stimulus paradigm (P50 ratio).
  • Correlational analysis examined the link between right hippocampal activity and sensory gating performance.

Main Results:

  • Higher activity in the right hippocampus was significantly associated with better sensory gating (lower P50 ratio).
  • This association was driven by a reduced response to the second stimulus in the paired-stimulus paradigm.
  • Findings indicate detectable hippocampal contributions to inhibitory processing in early infancy.

Conclusions:

  • Intrinsic hippocampal activity in the early postnatal period may support effective inhibitory processing.
  • The right hippocampus is a potential early biomarker for inhibitory dysfunction relevant to neurodevelopmental disorders.
  • Longitudinal studies are needed to track hippocampal function trajectory and its role in neurodevelopmental disorder risk and intervention.