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Related Experiment Videos

Sensation and action during active and passive movement.

M Takahashi1, K Watanuki, T Ikeda

  • 1Department of Otolaryngology, Yamaguchi University School of Medicine, Ube, Japan. masataka@po.cc.yamaguchi-u.ac.jp

Acta Oto-Laryngologica
|May 13, 1999
PubMed
Summary

Perception significantly impacts gaze and posture control. Integrating visual and vestibular inputs is crucial for coordinated sensation and action, especially during head movements without vision.

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Area of Science:

  • Neuroscience
  • Vestibular System
  • Human Motor Control

Background:

  • Understanding the sensory basis of active and passive sensation and action is fundamental to neuroscience.
  • The interplay between perception, gaze stabilization, and postural control requires further investigation, particularly concerning the role of vestibular and visual inputs.

Purpose of the Study:

  • To investigate the influence of perception on gaze and posture control.
  • To elucidate the mechanisms underlying coordinated sensation and action, differentiating between skilled and ataxic movements.

Main Methods:

  • Normal adults and a patient with bilateral labyrinthine loss were subjected to whole-body rotation in seated and standing positions.
  • Head tilting was performed with normal vision and with vision covered.

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  • Eye movements were recorded using a CCD video camera, and body sways were measured by a force platform.

    • Main Results:

    • Normal subjects exhibited ataxic gaze and posture during head tilting with vision covered, but maintained skilled control with normal vision.
    • The patient with bilateral labyrinthine loss showed no effect of head tilting without vision, indicating the importance of vestibular input.
    • Skilled and ataxic movements appear to be controlled by the perception of the external world, integrating visual and vestibular information.

    Conclusions:

    • Perception, derived from integrated visual and vestibular inputs, acts as a crucial vector for controlling both skilled and ataxic sensation and action.
    • The vestibular system plays a vital role in maintaining gaze and posture, especially when visual input is compromised.