Related Experiment Videos
Developmental and contextual influences on autonomic reactivity in young children
Abbey Alkon1, Lauren H Goldstein, Nancy Smider
1School of Nursing, University of California, San Francisco 94143-0606, USA. abbey.alkon@nursing.ucsf.edu
Insights
This study developed a reliable method to measure children's autonomic nervous system (ANS) reactivity using pre-ejection period (PEP) and respiratory sinus arrhythmia (RSA). Findings show age and context impact ANS responses in children aged 3-8.
Area of Science:
- Psychobiology
- Developmental Psychology
- Autonomic Nervous System Research
Background:
- Traditional cardiovascular reactivity studies in children use complex measures influenced by multiple factors.
- Differentiated autonomic function measures are needed to understand sympathetic and parasympathetic responses independently.
- Previous research has limited differentiated autonomic reactivity assessments in young children.
Purpose of the Study:
- To develop and validate a psychobiology protocol for assessing autonomic reactivity in children aged 3-8 years.
- To examine the effects of age, gender, and study context on autonomic measures.
- To establish normative data and discrete autonomic profiles for sympathetic (pre-ejection period) and parasympathetic (respiratory sinus arrhythmia) responses.
Main Methods:
- Development and validation of a psychobiology protocol for measuring autonomic reactivity.
- Assessment of pre-ejection period (PEP) as a sympathetic index and respiratory sinus arrhythmia (RSA) as a parasympathetic index.
- Analysis of autonomic profiles based on PEP and RSA responses in a normative sample of 3- to 8-year-old children.
Main Results:
- The developed protocol demonstrated validity and reliability for assessing autonomic reactivity in children.
- Autonomic reactivity showed significant differences based on age and study context.
- No significant gender differences were found in autonomic reactivity measures.
Conclusions:
- The study provides a feasible and reliable method for examining sympathetic and parasympathetic nervous system responses to challenge in young children.
- Findings offer guidelines for future research on autonomic reactivity during middle childhood.
- The protocol supports differentiated assessment of autonomic function in developmental psychobiology studies.
Abstract:
Studies of cardiovascular reactivity in young children have generally employed integrated, physiologically complex measures, such as heart rate and blood pressure, which are subject to the multiple influences of factors such as blood volume, hematologic status, thermoregulation, and autonomic nervous system (ANS) tone. Reactivity studies in children have rarely employed more differentiated, proximal measures of autonomic function capable of discerning the independent effects of sympathetic and parasympathetic responses. We describe 1) the development, validity, and reliability of a psychobiology protocol assessing autonomic reactivity to challenge in 3- to 8-year-old children; 2) the influences of age, gender, and study context on autonomic measures; and 3) the distributions of reactivity measures in a normative sample of children and the prevalences of discrete autonomic profiles. Preejection period (PEP) and respiratory sinus arrythmia (RSA) were measured as indices of sympathetic and parasympathetic nervous system reactivity, respectively, and autonomic profiles were created to offer summative indices of PEP and RSA response. Results confirmed the protocol's validity and reliability, and showed differences in autonomic reactivity by age and study context, but not by gender. The studies' findings offer guidelines for future research on autonomic reactivity in middle childhood and support the feasibility of examining sympathetic and parasympathetic responses to challenge in 3- to 8-year-old children.