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[Selection of vestibular system function in Chinese astronauts]
Jing-chen Pei1, Lei Chang, Zhi-qiang Liu
1Institute of Space Medico-Engineering, Beijing, China.
Summary
Chinese astronaut candidates exhibit varied vestibular functions. Most pilots demonstrated stable or relatively stable vestibular function, crucial for spaceflight selection.
Area of Science:
- Aerospace Medicine
- Human Physiology
- Vestibular System
Context:
- Selecting astronauts requires rigorous evaluation of physiological functions, particularly the vestibular system's role in spatial orientation and balance.
- Chinese astronaut candidates, primarily fighter pilots, underwent comprehensive vestibular function assessments.
Purpose:
- To evaluate the vestibular function of Chinese astronaut candidates for astronaut selection.
- To identify individuals with optimal vestibular capabilities for space missions.
Summary:
- Caloric tests revealed normal vestibular reflexes in all 59 candidates.
- Parallel swing and Coriolis acceleration tests identified functional differences in 38 pilots, categorizing them into stability types: 52.6% stable, 42.1% relatively stable, and 5.3% susceptible.
- Vestibular function assessment included vestibule-autonomic nervous reflex symptoms, electrogastrography (EGG), electronystagmography (ENG), ECG, blood pressure, and postural equilibrium.
Impact:
- The study provides a framework for objectively assessing astronaut candidates' vestibular function.
- Identifies a significant proportion of candidates with suitable vestibular function for selection as Chinese astronauts.