往復運動映像観視における重心動揺の時間特徴解析  [in Japanese] Temporal Analysis of Body Sway during Reciprocator Motion Movie Viewing  [in Japanese]

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Author(s)

    • 杉浦 明弘 SUGIURA Akihiro
    • 名古屋大学大学院情報科学研究科|岐阜医療科学大学保健科学部放射線技術学科 Graduate School of Information Science, Nagoya University|Department of Radiological Technology, Gifu University of Medical Science
    • 田中 邦彦 TANAKA Kunihiko
    • 岐阜医療科学大学保健科学部放射線技術学科 Department of Radiological Technology, Gifu University of Medical Science
    • 若田部 駿 WAKATABE Shun
    • 岐阜医療科学大学保健科学部放射線技術学科 Department of Radiological Technology, Gifu University of Medical Science
    • 松本 千佳 MATSUMOTO Chika
    • 岐阜医療科学大学保健科学部放射線技術学科 Department of Radiological Technology, Gifu University of Medical Science
    • 宮尾 克 MIYAO Masaru
    • 名古屋大学大学院情報科学研究科 Graduate School of Information Science, Nagoya University

Abstract

Objectives: We aimed to investigate the effect of stereoscopic viewing and the degree of awareness of motion sickness on posture by measuring body sway during motion movie viewing. Methods: Nineteen students (12 men and 7 women; age range, 21–24 years) participated in this study. The movie, which showed several balls randomly positioned, was projected on a white wall 2 m in front of the subjects through a two-dimensional (2-D)/three-dimensional (3-D) convertible projector. To measure body sway during movie viewing, the subjects stood statically erect on a Wii balance board, with the toe opening at 18 degrees. The study protocol was as follows: The subjects watched (1) a nonmoving movie for 1 minute as the pretest and then (2) a round-trip sinusoidally moving-in-depth-direction movie for 3 minutes. (3) The initial static movie was shown again for 1 minute. Steps (2) and (3) were treated as one trial, after which two trials (2-D and 3-D movies) were performed in a random sequence. Results: In this study, we found that posture changed according to the motion in the movie and that the longer the viewing time, the higher the synchronization accuracy. These tendencies depended on the level of awareness of motion sickness or the 3-D movie viewed. Conclusions: The mechanism of postural change in movie viewing was not vection but self-defense to resolve sensory conflict between visual information (spatial swing) and equilibrium sense (motionlessness).

Journal

  • Nippon Eiseigaku Zasshi (Japanese Journal of Hygiene)

    Nippon Eiseigaku Zasshi (Japanese Journal of Hygiene) 71(1), 19-29, 2016

    The Japanese Society for Hygiene

Codes

  • NII Article ID (NAID)
    130005121560
  • Text Lang
    JPN
  • ISSN
    0021-5082
  • Data Source
    J-STAGE 
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