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[Performing saccadic eye movements modifies postural control organisation].

P Rougier1, M Garin

  • 1Laboratoire de modélisation des activités sportives, université de Savoie, domaine universitaire de Savoie-Technolac, 73376 Le Bourget-du-Lac cedex, France. patrice.rougier@univ-savoie.fr

Neurophysiologie Clinique = Clinical Neurophysiology
|November 11, 2006
PubMed
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Performing saccadic eye movements alters postural control by delaying corrective responses and improving movement control. This highlights the importance of visual fixation during balance assessments.

Area of Science:

  • Human physiology
  • Neuroscience
  • Biomechanics

Background:

  • Maintaining balance requires complex sensorimotor integration.
  • Visual input significantly influences postural control strategies.

Purpose of the Study:

  • To investigate how saccadic eye movements affect postural control strategies.
  • To quantify changes in balance maintenance during voluntary eye movements.

Main Methods:

  • Twelve healthy adults stood on a force platform.
  • Center of pressure (CP) displacements were analyzed during various saccadic eye movement conditions (vertical and horizontal).
  • Frequency analysis and fractional Brownian motion (fBm) modeling were used to assess corrective process initiation and control.

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Main Results:

  • Saccadic eye movements reduced the magnitude of CP trajectories, particularly in the anteroposterior axis.
  • fBm modeling revealed a postural strategy characterized by delayed corrective processes.
  • This strategy enhanced the capacity to control corrective CP displacements.

Conclusions:

  • Saccadic eye movements induce a distinct postural strategy involving delayed corrections and improved control.
  • This adaptation may stem from challenges in visual information processing or increased cognitive load.
  • Fixating a visual target is recommended during postural assessments to minimize eye movement interference.