Postural adjustment response to depth direction moving patterns produced by virtual reality graphics

Shinsuke Kuno, Tetsuya Kawakita, Osamu Kawakami, Yozo Miyake, Satoru Watanabe

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Purpose. Human posture is controlled by a combination of vestibular, somatosensory and visual information. This paper is concerned with postural readjustment responses induced by vection. In the visual control of posture, visually-induced perception of self-motion plays an important role and is called vection. Vection is difficult to measure quantitatively because it is a highly subjective phenomenon. Hypothesis. An optokinetic stimulus that moves in depth induces vection. We hypothesize that the magnitude of the visually-induced body sway is correlated with the degree of vection. Methods. A depth optokinetic stimulus (DOKS) was projected onto a head-mounted display (HMD) worn by standing subjects. The DOKS consisted of a random dot pattern that was perceived three-dimensionally and moved in depth sinusoidally. Vection was estimated in two ways, a verbal assessment and a joystick maneuver. In addition, visually-induced body sway was measured by monitoring five reference points on the body by two video-motion analyzers. Results. The magnitude of the subjective vection was highly correlated with visually- induced body sway and was strongly dependent on the velocity of the visual stimulus. The ankle joint was pivoted during visually-induced body sway and acted as a motion initiator. When the magnitude of body sway was large, the body movement was adjusted at the hip and head-neck joints. Conclusions. The high correlation between vection and body sway suggests that vection can be estimated quantitatively by measuring visually-induced body sway.

Original languageEnglish
Pages (from-to)417-424
Number of pages8
JournalJapanese Journal of Physiology
Volume49
Issue number5
Publication statusPublished - 1999 Oct
Externally publishedYes

Fingerprint

Social Adjustment
Posture
Head
Motion Perception
Ankle Joint
Hip
Neck
Joints
Direction compound

Keywords

  • Depth optokinetic stimulation
  • Postural adjustment
  • Vection
  • Visually-induced body sway

ASJC Scopus subject areas

  • Physiology

Cite this

Kuno, S., Kawakita, T., Kawakami, O., Miyake, Y., & Watanabe, S. (1999). Postural adjustment response to depth direction moving patterns produced by virtual reality graphics. Japanese Journal of Physiology, 49(5), 417-424.

Postural adjustment response to depth direction moving patterns produced by virtual reality graphics. / Kuno, Shinsuke; Kawakita, Tetsuya; Kawakami, Osamu; Miyake, Yozo; Watanabe, Satoru.

In: Japanese Journal of Physiology, Vol. 49, No. 5, 10.1999, p. 417-424.

Research output: Contribution to journalArticle

Kuno, S, Kawakita, T, Kawakami, O, Miyake, Y & Watanabe, S 1999, 'Postural adjustment response to depth direction moving patterns produced by virtual reality graphics', Japanese Journal of Physiology, vol. 49, no. 5, pp. 417-424.
Kuno, Shinsuke ; Kawakita, Tetsuya ; Kawakami, Osamu ; Miyake, Yozo ; Watanabe, Satoru. / Postural adjustment response to depth direction moving patterns produced by virtual reality graphics. In: Japanese Journal of Physiology. 1999 ; Vol. 49, No. 5. pp. 417-424.
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