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Performing saccadic eye movements or blinking improves postural control.

Patrice Rougier1, Mélanie Garin

  • 1Laboratoire de Modelisation des Activites Sportives, Le Bourget du Lac, France.

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Saccadic eye movements, unlike blinking, significantly impact postural control during standing. These eye movements reduce body sway, suggesting a link between ocular and balance systems in humans.

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Area of Science:

  • Neuroscience
  • Biomechanics
  • Human Physiology

Background:

  • Postural control is crucial for maintaining balance during upright stance.
  • The influence of ocular movements on postural stability is not fully understood.
  • Previous research suggests a potential connection between eye movements and body sway.

Purpose of the Study:

  • To investigate the relationship between specific eye movements and postural control.
  • To determine if imposed blinking and saccadic eye movements affect upright stance maintenance.
  • To explore the impact of ocular motor activity on the center of gravity (CG) and center of pressure (CP) dynamics.

Main Methods:

  • Fifteen healthy young adults participated in an undisturbed upright stance protocol.
  • Participants performed imposed bilateral blinking and horizontal/vertical saccadic eye movements.
  • Center of pressure (CP) trajectories were recorded using a force platform.
  • Center of gravity (CGv) and CP-CGv differences were estimated using low-pass filtering.

Main Results:

  • Regular bilateral blinking did not significantly alter postural control.
  • Saccadic eye movements led to a reduction in the amplitude of CGv and CP-CGv movements.
  • This effect was most pronounced along the antero-posterior axis.

Conclusions:

  • Ocular motor activity, specifically saccadic eye movements, can modify postural control during upright stance.
  • The findings support the theory linking ocular movements to postural stability in humans.
  • Further research is warranted to elucidate the precise mechanisms involved.