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Disorientation and postural ataxia following flight simulation

R S Kennedy1, K S Berbaum, M G Lilienthal

  • 1Essex Corporation, Orlando, FL 32803, USA.

Aviation, Space, and Environmental Medicine
|January 1, 1997
PubMed
Summary
This summary is machine-generated.

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Simulator sickness disorientation symptoms correlate with postural instability. This suggests disorientation, not nausea or eyestrain, is the primary cause of simulator-induced unsteadiness.

Area of Science:

  • Aviation Psychology
  • Human Factors Engineering
  • Aerospace Medicine

Background:

  • Military pilots experience motion sickness-like symptoms during simulator training.
  • Simulator sickness encompasses gastrointestinal distress, eyestrain, and disorientation.
  • The Simulator Sickness Questionnaire (SSQ) assesses these dimensions.

Purpose of the Study:

  • To test the hypothesis that disorientation symptoms reported via the SSQ correlate with objective measures of postural instability.
  • To investigate the relationship between simulator-induced disorientation and post-simulation balance deficits.

Main Methods:

  • Analysis of data from two Navy flight simulators (Device 2F114 and Device 2F143).
  • Administration of postural stability tests (standing and walking unsteadiness).

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  • Utilized the Simulator Sickness Questionnaire (SSQ) to assess symptoms.

    • Main Results:

    • Significant correlations were observed between postural stability tests and SSQ disorientation subscale scores.
    • Correlations between postural stability and SSQ nausea/oculomotor subscales were weak and not significant.
    • Postural instability appears strongly linked to simulator-induced disorientation.

    Conclusions:

    • Findings support the validity of the SSQ disorientation subscale.
    • Postural instability after simulator exposure is likely a consequence of disorientation.
    • Disorientation is a key factor in simulator sickness impacting pilot performance.