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Related Experiment Videos

Postural control as a function of self- and object-motion perception.

Paulo B Freitas Júnior1, José A Barela

  • 1Laboratory of Movement Studies, Department of Physical Education, Institute of Biosciences, State University of São Paulo, Rio Claro, Brazil.

Neuroscience Letters
|September 24, 2004
PubMed
Summary

Prior knowledge of sensory manipulation reduces visual influence on body sway. This effect is distance-dependent in self-motion perception but not object-motion perception, indicating altered postural control.

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Area of Science:

  • Neuroscience
  • Biomechanics
  • Human Perception

Background:

  • Body sway is a critical indicator of postural control.
  • Visual information significantly influences postural stability.
  • The perception of self-motion versus object-motion may differentially affect visual-vestibular integration.

Purpose of the Study:

  • To investigate how visual information affects body sway.
  • To differentiate the influence based on self-motion versus object-motion perception.
  • To assess the role of visual information quality and participant awareness.

Main Methods:

  • Participants stood at varying distances in a moving room.
  • Two conditions: unaware (self-motion perception) and aware (object-motion perception) of room movement.

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  • Body sway was measured to quantify postural control.

    • Main Results:

    • Awareness of the moving room (object-motion) diminished the visual influence on body sway.
    • In self-motion perception, the visual influence on body sway decreased with increasing distance.
    • No distance-dependent effect on body sway was observed in object-motion perception.

    Conclusions:

    • Prior knowledge of sensory manipulation can alter postural control system functioning.
    • Adaptation to changing sensory quality occurs in self-motion perception but not object-motion perception.
    • Distinguishes between perceptual modes in how sensory information is integrated for postural stability.