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Related Experiment Videos

Postural control responses sitting on unstable board during visual stimulation.

Y Mizuno1, M Shindo, S Kuno

  • 1Neuroscience Lab., Daido Institute of Technology, Takiharu-cho 10-3, Minami-ku, Nagoya 457-8530, Japan.

Acta Astronautica
|October 24, 2001
PubMed
Summary

Optokinetic stimulation causes vection, influencing body sway. Head movements counteract body sway, suggesting vestibulo-collic reflex control of neck muscles for postural stability.

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Area of Science:

  • Neuroscience
  • Biomechanics
  • Human Physiology

Background:

  • Vection, or the sensation of self-motion, can be induced by visual stimuli.
  • Postural control involves complex interactions between visual, vestibular, and somatosensory systems.
  • The role of neck proprioception in maintaining balance during visual stimulation is not fully understood.

Purpose of the Study:

  • To investigate the relationship between visually induced vection and body sway.
  • To analyze the specific role of neck joint movement in postural control during optokinetic stimulation.
  • To examine the influence of head movement on body stability on a seesaw board.

Main Methods:

  • Optokinetic stimulation delivered via a head-mounted display (H.M.D.) to induce vection.

Related Experiment Videos

  • Postural sway analysis using a seesaw board to assess body movement.
  • Measurement of upper body and head movements relative to the seesaw board.

    • Main Results:

    • Optokinetic stimulation successfully induced vection, leading to body sway on the seesaw board.
    • The upper body (excluding the head) moved in the same direction as the seesaw board.
    • The head exhibited an out-of-phase movement relative to the seesaw board, counteracting the sway.

    Conclusions:

    • Head counter-movements play a crucial role in stabilizing the body during vection-induced sway.
    • Neck muscle tonus is likely regulated by the vestibulo-collic reflex to maintain postural equilibrium.
    • This study highlights the integration of visual and vestibular inputs for effective postural control.