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Updated: Aug 14, 2026
Measuring Cardiac Autonomic Nervous System (ANS) Activity in Toddlers - Resting and Developmental Challenges
Published on: February 25, 2016
Autonomic reactivity and clinical severity in children with sickle cell disease
Sarah R Pearson1, Abbey Alkon, Marsha Treadwell
1School of Public Health, University of California, Berkeley, 94720-1190, USA.
Insights
Autonomic nervous system reactivity in children with sickle cell disease is linked to disease severity and behavioral issues. Understanding these individual differences may help explain variations in complications and symptoms.
Area of Science:
- Pediatric Health
- Autonomic Nervous System Research
- Hematology
Background:
- Individual differences in autonomic nervous system (ANS) reactivity are linked to health outcomes.
- Research on ANS reactivity in children with chronic diseases, particularly sickle cell disease (SCD), is limited.
- Understanding ANS function in pediatric SCD is crucial for managing health and behavioral symptoms.
Purpose of the Study:
- To investigate the associations between ANS reactivity, clinical severity, family stressors, and mental health symptoms in children with homozygous SCD.
- To explore how ANS responses to various challenges relate to disease burden and behavioral patterns.
- To identify potential biological markers for symptom variability in pediatric SCD.
Main Methods:
- Cross-sectional study of 19 children with homozygous SCD.
- Utilized parent-completed questionnaires, medical record reviews, and laboratory-based ANS assessments.
- Measured ANS responses (parasympathetic withdrawal, sympathetic activation) during social, cognitive, physical, and emotional challenges.
Main Results:
- Autonomic reactivity showed significant associations with both clinical severity and externalizing behavior symptoms.
- Greater parasympathetic withdrawal correlated with more severe SCD (r = -0.45, p < 0.05).
- Increased sympathetic activation was linked to more externalizing behaviors (r = 0.44, p < 0.05).
- Family stressors were associated with internalizing behaviors, but not ANS reactivity or clinical severity.
Conclusions:
- Individual differences in ANS reactivity may explain variations in painful episodes, physical complications, and behavioral symptoms in children with SCD.
- ANS reactivity presents a novel, biologically plausible pathway for understanding symptom heterogeneity in pediatric SCD.
- Further research into ANS function could inform targeted interventions for children with sickle cell disease.
Abstract:
Individual differences in autonomic nervous system reactivity have been studied in relation to physical and mental health outcomes, but rarely among children with chronic disease. The purpose of this study was to examine the associations among autonomic reactivity, clinical severity, family stressors, and mental health symptoms in children with homozygous sickle cell disease. Nineteen children with homozygous sickle cell disease participated in a cross-sectional study involving parent-completed measures, medical record reviews and laboratory-based measures of autonomic nervous system responses to social, cognitive, physical and emotional challenges. Autonomic reactivity was significantly associated with both clinical severity and externalizing behavior symptoms. Children with greater parasympathetic withdrawal during challenges compared to rest had significantly more severe disease (r = -0.45, p < 0.05); greater sympathetic activation during challenges compared to rest was associated with more externalizing behavior symptoms ( r= 0.44, p < 0.05). Children experiencing major family stressors had internalizing behavior symptoms but no difference in autonomic reactivity or clinical severity compared to children experiencing fewer family stressors. Individual differences in autonomic reactivity may offer a new, biologically plausible account for observed variation in painful episodes, other physical complications and behavioral symptoms among children with sickle cell disease.
