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Autonomic indexes during the vestibular-visual conflict exposure: a squirrel monkey study
M Igarashi1, S Chae, S MacDonald
1Department of Otorhinolaryngology and Communicative Sciences, Baylor College of Medicine, Houston, Texas 77030.
Auris, Nasus, Larynx
|January 1, 1990
Summary
Vestibular-visual conflict (VVC) triggers autonomic neural responses, increasing salivation and heart rate variability. These changes can objectively monitor motion sickness severity.
Area of Science:
- Neuroscience
- Autonomic Nervous System Research
- Vestibular System Studies
Background:
- Vestibular-visual conflict (VVC) is a known trigger for motion sickness.
- Understanding the dynamic autonomic neural responses to VVC is crucial for developing countermeasures.
- Objective biomarkers for motion sickness severity are needed.
Purpose of the Study:
- To assess dynamic autonomic neural responses to VVC in squirrel monkeys.
- To analyze changes in salivation and heart rate variability during VVC exposure.
- To determine the correlation between physiological markers and VVC severity.
Main Methods:
- Squirrel monkeys were exposed to VVC in the pitch plane.
- Salivary amount and sodium concentration were measured.
- The coefficient of variance (CV) of R-R intervals (RRI) was analyzed.
- Changes were monitored over time during stimulation periods.
Main Results:
- Salivary amount and sodium concentration increased significantly during VVC exposure.
- The CV of RRI increased throughout the stimulation periods.
- A strong positive correlation was found between CV of RRI and salivation amount.
- Autonomic responses showed a common pattern during VVC.
Conclusions:
- VVC elicits a distinct pattern of autonomic neural response.
- Salivation and heart rate variability serve as objective indicators of VVC.
- These physiological markers can be used to monitor motion sickness severity.