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Related Experiment Videos

Early postnatal development of sensory gating.

Michael A Kisley1, Sherrie D Polk, Randal G Ross

  • 1Schizophrenia Research Center, Denver Veteran's Affairs Medical Center, Colorado, USA. michael.kisley@uchsc.edu

Neuroreport
|April 15, 2003
PubMed
Summary

Infants show early development of sensory gating, the brain's ability to filter stimuli. This study measured auditory evoked potential suppression in infants, finding functional neural circuits for sensory gating at a very young age.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Auditory Neuroscience

Background:

  • Sensory gating is the nervous system's mechanism for inhibiting responses to irrelevant stimuli.
  • Understanding the development of sensory gating is crucial for identifying potential neurological risks early in life.

Purpose of the Study:

  • To characterize the early development of acoustic sensory gating in healthy infants.
  • To investigate the functionality of neural circuits for sensory gating during early postnatal development.

Main Methods:

  • Measured suppression of the auditory evoked potential component P1 (P50) in response to paired auditory clicks.
  • Study conducted during REM sleep in healthy infants aged 1-4 months.
  • Infants had no genetic risk for disrupted sensory gating (e.g., family history of schizophrenia).

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Main Results:

  • Infants, as a group, demonstrated significant suppression of auditory evoked potentials.
  • A positive correlation was observed between increasing infant age and stronger response suppression.
  • Changes in sleep physiology were considered as a potential confounding factor but did not negate the findings.

Conclusions:

  • The neural circuits responsible for sensory gating are functional very early in postnatal development.
  • Early development of acoustic sensory gating is evident within the first few months of life.
  • Findings suggest a foundational capacity for stimulus filtering in the infant brain.