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Vertigo after sailing a nineteenth century ship

H Cohen1

  • 1Department of Otorhinolaryngology and Communicative Sciences, Baylor College of Medicine, Houston, TX 77030, USA.

Journal of Vestibular Research : Equilibrium & Orientation
|January 1, 1996
PubMed
Summary

Sailors may experience post-sailing vertigo, a motion illusion, particularly nonprofessionals. This phenomenon fades with exposure and may involve central vestibular system adaptation.

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Area of Science:

  • Vestibular Neuroscience
  • Human Physiology

Background:

  • Illusions of motion after sailing are infrequently documented, especially those not requiring medical attention.
  • Understanding these phenomena is crucial for maritime safety and crew well-being.

Purpose of the Study:

  • To investigate the incidence, intensity, and quality of post-sailing motion illusions in subjects after sailing on a square-rigged ship.
  • To characterize the features of these illusions and identify potential contributing factors.

Main Methods:

  • Subjects underwent five-hour sailing periods on a square-rigged ship.
  • Post-sailing surveys were administered to assess the occurrence, intensity, and nature of motion illusions.
  • Data were collected on environmental conditions (e.g., calm day) and participant characteristics (e.g., professional vs. nonprofessional sailors).

Main Results:

  • 20% to 41% of the crew reported experiencing post-sailing vertigo, even on calm days.
  • Vertigo was exclusively reported by nonprofessional sailors.
  • The phenomenon exhibited extinction with repeated exposure, a lag time of approximately two hours to onset, brief duration, and occurred in enclosed visual environments.

Conclusions:

  • Post-sailing vertigo in nonprofessional sailors shares characteristics with vestibular habituation.
  • Central vestibular mechanisms are suggested to play a role in this motion illusion.
  • Further research into vestibular adaptation and maritime occupational health is warranted.

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