Respiratory sinus arrhythmia (RSA), vagal tone and biobehavioral integration: Beyond parasympathetic function.
Level 5 - mechanism / opinion, no new human data
Narrative review and theoretical model with no new empirical human data.
PubMed 38151156 · doi:10.1016/j.biopsycho.2023.108739
What was done
Narrative review and theoretical framework evaluating concepts, terminology, and measurements used over the past 50 years linking respiratory sinus arrhythmia (RSA) and vagal function to psychological processes and general health.
What was found
The abstract reports no numerical data. It posits that RSA is neither an invariably reliable index of cardiac vagal tone nor of central vagal outflow to the heart, but rather an evolutionarily conserved phenomenon meeting shifting metabolic, energy, and behavioral demands.
Why it matters
It challenges the common assumption that RSA can be used as a direct proxy for parasympathetic vagal tone in psychophysiological research.
Limits
Narrative theoretical review with no original experimental data, quantitative meta-analysis, or systematic search methodology reported in the abstract.
Cited by
- supports Heart rate speeds up slightly during inhalation and slows down during exhalation via respiratory sinus arrhythmia mediated by the vagus nerve.