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Perceived gravitoinertial force during vection.

Takeharu Seno1, Stephen Palmisano, Hiroyuki Ito

  • 1Faculty of Design and Institute for Advanced Study, Kyushu University, Fukuoka, Japan. seno@design.kyushu-u.ac.jp

Aviation, Space, and Environmental Medicine
|September 13, 2013
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Summary

Visual motion (vection) alters perceived weight by influencing how the brain integrates self-motion cues. This study shows that stronger vection leads to greater changes in perceived body weight.

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Area of Science:

  • Neuroscience
  • Human Perception
  • Sensory Integration

Background:

  • Riding roller coasters alters perceived gravitoinertial force.
  • The relationship between visually induced self-motion (vection) and perceived gravitoinertial force is not well understood.

Purpose of the Study:

  • To investigate if visually induced self-motion affects perceived gravitoinertial force.
  • To determine if the strength of vection influences perceived weight.

Main Methods:

  • 15 stationary subjects wore weight jackets and experienced visual displays simulating upward, backward, or no self-motion.
  • Subjects rated vection strength and adjusted weights to match perceived body weight during visual stimulus exposure.

Main Results:

  • Upward vection increased perceived weight; downward vection decreased it.
  • The magnitude of perceived weight change correlated with the intensity of the vection experience.

Conclusions:

  • The brain reconciles conflicting self-motion sensory inputs, linking vection to perceived weight.
  • Findings are relevant for virtual reality and vehicle simulator design, especially fixed-base simulators.