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[Changes of electrogastrogram in pilots under vestibular stimulus].

G Tian1, Z Liu, Y Yu

  • 1Air Force Qingdao Sanitorium, China.

Hang Tian Yi Xue Yu Yi Xue Gong Cheng = Space Medicine & Medical Engineering
|April 1, 1997
PubMed
Summary

Vestibular stimulus alters electrogastrogram (EGG) parameters in pilots, indicating potential autonomic nervous system function changes. These EGG metrics may serve as valuable indices for assessing physiological responses to vestibular challenges.

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Area of Science:

  • Aerospace Medicine
  • Physiology
  • Neuroscience

Background:

  • The vestibular system plays a crucial role in spatial orientation and balance.
  • Understanding the physiological responses to vestibular stimulation is vital for professions involving dynamic environments, such as piloting.
  • Electrogastrogram (EGG) measures gastric electrical activity, reflecting autonomic nervous system (ANS) influence on the stomach.

Purpose of the Study:

  • To investigate the effects of vestibular stimulus on electrogastrogram (EGG) parameters in pilots.
  • To explore the potential of EGG parameters as indicators of autonomic nervous system function under vestibular load.
  • To analyze changes in EGG components during and after vestibular stimulation.

Main Methods:

  • Active electrogastrogram (EGG) recordings were obtained from 81 pilots.

Related Experiment Videos

  • Running spectrum analysis was employed to analyze the EGG data.
  • Subjects were subjected to vestibular stimulus and divided into two groups (A and B).

    • Main Results:

    • Vestibular stimulus induced significant changes in EGG parameters, including dominant frequency instability coefficient (DFIC), dominant power instability coefficient (DPIC), tachygastria, bradygastria, and normal slow wave components (NSW).
    • These EGG alterations suggest a modulation of autonomic nervous system activity by vestibular input.
    • No significant differences in these EGG parameters were observed between the per-rotation and rotation periods, or between the two study groups.

    Conclusions:

    • EGG parameters, specifically DFIC, DPIC, tachygastria, bradygastria, and NSW, are sensitive to vestibular stimulation.
    • These EGG metrics show promise as objective indices for evaluating autonomic nervous system function in response to vestibular challenges.
    • The findings contribute to understanding the complex interplay between the vestibular and autonomic systems in pilots.