Perceived direction of gravity and the body-axis during static whole body roll-tilt in healthy subjects.

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Perceived direction of gravity and the body-axis during static whole body roll-tilt in healthy subjects.

Acta Otolaryngol. 2017 May 24;:1-6

Authors: Tamura A, Wada Y, Inui T, Shiotani A

Abstract
OBJECTIVE: We used the subjective visual vertical (SVV) and two different subjective visual body axis (SVBA) methods to quantify roll-tilt perception under gravity, and investigated the characteristics of these methods during static roll-tilt. In addition, we independently developed a compact device to facilitate evaluation of SVBA in different gravitational environments.
METHODS: Ten male volunteers participated in this study. We created a roll-tilt environment using a flight simulator in a dark room. The cockpit of the simulator was tilted leftward or rightward (-30°, -20°, -10°, 0°, 10°, 20° and 30°) in each randomly ordered trial. We quantified roll-tilt perception such that the experiment was conducted under 21 different conditions per participant.
RESULTS: We found no significant differences among the SVV error and the two types of SVBA error.
CONCLUSIONS: The SVV and the SVBA methods may be useful for evaluating subjective roll-tilt perception.

PMID: 28537142 [PubMed - as supplied by publisher]

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