Related Experiment Video
Updated: May 4, 2026
P50 Sensory Gating in Infants
Published on: December 26, 2013
P50 sensory gating in infants
Anne Spencer Ross1, Sharon Kay Hunter, Mark A Groth
1Department of Psychiatry, University of Colorado School of Medicine.
Insights
Assessing infant auditory P50 sensory gating, a passive EEG measure, offers a novel window into early attention development. This method may help identify neurodevelopmental origins of attentional deficits in infants.
Area of Science:
- Neuroscience
- Developmental Psychology
- Psychiatry
Background:
- Attentional deficits are prevalent in neuropsychiatric disorders like ADHD, autism, bipolar disorder, and schizophrenia.
- These deficits often stem from neurodevelopmental issues originating in infancy or prenatal stages.
- Current methods for assessing attention in early infancy are limited.
Purpose of the Study:
- To introduce and describe the methodology for assessing infant auditory P50 sensory gating.
- To highlight the potential of this passive electroencephalogram (EEG) task for studying early attention.
- To provide a tool for understanding the developmental trajectory of attentional deficits.
Main Methods:
- Utilizes auditory P50 sensory gating, a passive EEG task measuring the brain's response to auditory stimuli.
- Presents identical auditory stimuli 500 ms apart to assess the gating response.
- Adapts methodologies previously used in adult populations for infant assessment.
Main Results:
- Sensory gating involves reduced EEG response to a second stimulus, indicating effective inhibition.
- Poor sensory gating (failure to reduce the response to the second stimulus) is linked to impaired cerebral inhibition.
- This impairment in sensory gating correlates with attentional deficits.
Conclusions:
- Infant auditory P50 sensory gating is a viable method for assessing early attention.
- This passive task is suitable for use with young infants, offering insights into neurodevelopment.
- It may serve as an early indicator for attentional deficits and related neuropsychiatric disorders.
Abstract:
Attentional deficits are common in a variety of neuropsychiatric disorders including attention deficit-hyperactivity disorder, autism, bipolar mood disorder, and schizophrenia. There has been increasing interest in the neurodevelopmental components of these attentional deficits; neurodevelopmental meaning that while the deficits become clinically prominent in childhood or adulthood, the deficits are the results of problems in brain development that begin in infancy or even prenatally. Despite this interest, there are few methods for assessing attention very early in infancy. This report focuses on one method, infant auditory P50 sensory gating. Attention has several components. One of the earliest components of attention, termed sensory gating, allows the brain to tune out repetitive, noninformative sensory information. Auditory P50 sensory gating refers to one task designed to measure sensory gating using changes in EEG. When identical auditory stimuli are presented 500 ms apart, the evoked response (change in the EEG associated with the processing of the click) to the second stimulus is generally reduced relative to the response to the first stimulus (i.e. the response is "gated"). When response to the second stimulus is not reduced, this is considered a poor sensory gating, is reflective of impaired cerebral inhibition, and is correlated with attentional deficits. Because the auditory P50 sensory gating task is passive, it is of potential utility in the study of young infants and may provide a window into the developmental time course of attentional deficits in a variety of neuropsychiatric disorders. The goal of this presentation is to describe the methodology for assessing infant auditory P50 sensory gating, a methodology adapted from those used in studies of adult populations.
