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Related Experiment Video

Updated: Jun 19, 2026

Measuring Cardiac Autonomic Nervous System (ANS) Activity in Children

Measuring Cardiac Autonomic Nervous System (ANS) Activity in Children

Published on: April 29, 2013

Thoracoabdominal Asynchrony in Healthy Children.

Kristjan Dereksson^1,2, Sigrun Helga Lund³, Agneta Markström⁴

¹Pediatrics, Clinical Sciences, Lund University, Lund, Sweden.

Journal of Sleep Research

|June 18, 2026

Summary

Thoracoabdominal asynchrony (TAA) measurement can help diagnose obstructive sleep apnea (OSA) in children. Healthy children spend less than 10% of sleep time with elevated TAA, while OSA patients exceed this threshold.

Keywords:

obesity obstructive sleep apnea polysomnography respiratory effort snoring

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Last Updated: Jun 19, 2026

Measuring Cardiac Autonomic Nervous System (ANS) Activity in Children

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Published on: April 29, 2013

A Modified Sonographic Algorithm for Image Acquisition in Life-Threatening Emergencies in the Critically Ill Newborn

A Modified Sonographic Algorithm for Image Acquisition in Life-Threatening Emergencies in the Critically Ill Newborn

Published on: April 7, 2023

Area of Science:

Pediatric Sleep Medicine
Respiratory Physiology

Background:

Thoracoabdominal asynchrony (TAA) reflects inspiratory effort and upper airway obstruction during sleep in children.
Accurate diagnosis of obstructive sleep apnea (OSA) in children is crucial for timely intervention.

Purpose of the Study:

To establish a normative range for TAA in healthy children aged 10-13 years.
To assess the correlation between TAA and OSA severity, sleep parameters, and patient demographics.

Main Methods:

Polysomnography data from 113 children (10-13 years) were analyzed.
Percentage of total sleep time (TST) with elevated TAA (>40°) was measured.
Obstructive apnea-hypopnea index (OAHI), sleep position, sleep stage, and snoring were recorded.

Main Results:

Healthy children (N=94) had elevated TAA for 3.3% of TST; OSA patients (N=19) had elevated TAA for 10.7% of TST (p < 0.00001).
A cut-off of 9.6% (rounded to 10%) of TST for elevated TAA was established as normal.
Elevated TAA was more prevalent during REM sleep, supine position, and associated with increased snoring and obesity.

Conclusions:

TAA assessment using RIP-bands can aid in interpreting pediatric sleep studies.
A normative TAA range of <10% TST may help differentiate healthy children from those with OSA.
Further research could integrate TAA into clinical decision-making for pediatric sleep disorders.