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Related Experiment Video

Updated: Jun 14, 2026

Testing Sensory and Multisensory Function in Children with Autism Spectrum Disorder

Testing Sensory and Multisensory Function in Children with Autism Spectrum Disorder

Published on: April 22, 2015

Parasympathetic functions in children with sensory processing disorder.

Roseann C Schaaf¹, Teal Benevides, Erna Imperatore Blanche

¹Department of Occupational Therapy, Jefferson School of Health Professions and Farber Institute for Neuroscience, Thomas Jefferson University Philadelphia, PA, USA.

Frontiers in Integrative Neuroscience

|March 20, 2010

Summary

Parasympathetic nervous system (PsNS) activity may be a biomarker for sensory modulation dysfunction (SMD) in children. Lower PsNS activity in children with severe SMD correlates with poorer adaptive behaviors, impacting daily living and communication skills.

Keywords:

heart period variability modulation parasympathetic nervous system respiratory sinus arrhythmia sensory processing disorder vagal tone

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Area of Science:

Neuroscience
Developmental Psychology
Pediatrics

Background:

Parasympathetic nervous system (PsNS) activity regulates reactivity in children.
Sensory modulation dysfunction (SMD) is a condition associated with sensory processing disorders.
Understanding the link between PsNS activity and sensory processing is crucial for interventions.

Purpose of the Study:

To compare PsNS activity in children with SMD versus typically developing (TYP) children.
To determine if PsNS activity predicts sensory behaviors and adaptive functions in children with SMD.
To identify subgroups of children with distinct physiological and behavioral sensory reactivity profiles.

Main Methods:

Evaluated PsNS activity using a Sensory Challenge Protocol (baseline, stimuli, recovery).
Assessed response to prolonged auditory stimuli.
Utilized latent class analysis to group children by severity and physiological/behavioral profiles.

Main Results:

Children with severe SMD showed a trend for lower baseline PsNS activity compared to TYP children.
Children with SMD exhibited significantly poorer adaptive behaviors in communication and daily living.
Severe SMD group displayed significantly lower PsNS activity at baseline, during auditory tones, and prolonged auditory stimuli.

Conclusions:

Low PsNS activity may serve as a biomarker for severe SMD in children.
Physiological differences in children with severe SMD may impact their daily social, communication, and living skills.
These findings support the link between physiological regulation and functional outcomes in children with sensory processing challenges.