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The perception of roll tilt in pilots during a simulated coordinated turn in a gondola centrifuge.
KTH, School of Technology and Health (STH), Environmental Physiology.
KTH, School of Technology and Health (STH), Environmental Physiology.
KTH, School of Technology and Health (STH), Environmental Physiology.
2011 (English)In: Aviation, Space and Environmental Medicine, ISSN 0095-6562, E-ISSN 1943-4448, Vol. 82, no 5, 523-30 p.Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: It has previously been reported that nonpilots underestimate the roll tilt angle after acceleration in a gondola centrifuge. The aim of the present work was to elucidate the significance of flight experience for roll tilt perception based on vestibular information.

METHODS: The subjective visual horizontal (SVH) was measured by means of an adjustable luminous line in darkness. Eight nonpilots (N), nine fighter pilots (F), and eight helicopter pilots (H) underwent two centrifuge runs (2 G, 5 min) heading forward and backward, respectively. The roll position of the gondola (60 degrees at 2 G) was controlled so that the subject was always upright with respect to the gravitoinertial force.

RESULTS: Upon acceleration of the centrifuge there was a tilt of the SVH in a direction compensatory to the inclination of the gondola. This tilt was larger in the forward position [N: 17.2 +/- 6.4 degrees, F: 31.2 +/- 16.4 degrees, H: 33.6 +/- 18.2 degrees (means +/- SD)] than in the backward position (N: -5.0 +/- 6.8 degrees, F: -12.2 +/- 17.4 degrees, H: -10.4 +/- 15.4 degrees). In N the tilt declined with time, approaching zero by the end of the 2-G plateau. In the pilots it was significantly larger and did not decline.

CONCLUSION: Flight experience results in an increased ability to perceive the roll tilt during movement along a curved path. That this can be revealed in a centrifuge might suggest that acceleration of the centrifuge constitutes a movement pattern which is similar, from a vestibular point of view, to that of an airplane entering a coordinated turn.

Place, publisher, year, edition, pages
2011. Vol. 82, no 5, 523-30 p.
Keyword [en]
spatial orientation, spatial disorientation, spatial disorientation training, vestibular psychophysics, vestibular adaptation, vestibular habituation, vestibular training
National Category
Physiology
Identifiers
URN: urn:nbn:se:kth:diva-44496DOI: 10.3357/ASEM.2898.2011ISI: 000290057400004PubMedID: 21614866Scopus ID: 2-s2.0-79955514673OAI: oai:DiVA.org:kth-44496DiVA: diva2:450714
Note
QC 20111021Available from: 2011-10-21 Created: 2011-10-21 Last updated: 2017-12-08Bibliographically approved

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