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A behavioral link between the oculomotor and cardiovascular systems
R A Tyrrell1, J F Thayer, B H Friedman
1Department of Psychology, Clemson University, SC 29634-1511, USA.
Summary
This study reveals a connection between eye and heart activity, suggesting shared autonomic nervous system patterns influence both. Cardiovascular measures predict eye movements, linking autonomic control to oculomotor function.
Area of Science:
- Neuroscience
- Psychophysiology
- Autonomic Nervous System Research
Background:
- The eyes (oculomotor system) and heart (cardiovascular system) are both influenced by autonomic innervation.
- Recent advancements enable better assessment of oculomotor and cardiovascular behaviors.
Purpose of the Study:
- To investigate the behavioral covariation between oculomotor and cardiovascular systems.
- To explore the relationship between autonomic activation patterns and eye-heart links.
Main Methods:
- Measured oculomotor tone using dark focus and dark vergence.
- Assessed cardiovascular control via spectral decomposition of heart rate variability.
- Conducted three experiments examining individual differences and within-subject variations.
Main Results:
- Cardiovascular parameters predicted dark vergence (R2 = .806) but not dark focus (R2 = .404) in Experiment 1.
- Heart rate correlated positively with dark vergence; panic attack and blood phobia groups showed distinct oculomotor and cardiovascular profiles in Experiment 2.
- Oculomotor measures shifted towards nearer positions during sympathetic cardiac dominance in Experiment 3, with cardiovascular variations predicting oculomotor parameters.
Conclusions:
- Shared patterns of autonomic activation likely underlie the observed eye-heart link.
- Autonomic nervous system activity influences both cardiovascular control and oculomotor tone.