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Wearing a head-mounted eye tracker may reduce body sway.

Gisele C Gotardi1, Sérgio T Rodrigues1, Fabio A Barbieri2

  • 1Post-graduation Program in Movement Sciences, São Paulo State University - UNESP, São Paulo, Brazil; Laboratory of Information, Vision, and Action, Department of Physical Education, Faculty of Sciences, São Paulo State University, Bauru, Brazil.

Neuroscience Letters
|February 24, 2020
PubMed
Summary
This summary is machine-generated.

Wearing a head-mounted eye tracker reduced body sway in young adults during balance tasks. However, the impact of visual tasks on postural stability remained consistent, regardless of eye tracker use.

Keywords:
Gaze fixationHead stabilizationHead-mounted eye trackerPostural controlSaccadic eye movements

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Area of Science:

  • Biomechanics
  • Human Movement Science
  • Neuroscience

Background:

  • Postural stability is crucial for daily activities and is influenced by visual input.
  • Head-mounted eye trackers are increasingly used in research but their effect on balance is not fully understood.

Purpose of the Study:

  • To investigate the impact of wearing a head-mounted eye tracker on upright balance during various visual tasks.
  • To determine if the eye tracker alters the influence of visual conditions on postural control.

Main Methods:

  • Twenty-five young adults performed balance tasks (fixation, saccades, eyes closed) on a force plate.
  • Measurements were taken with and without a head-mounted eye tracker.
  • Center of Pressure (CoP) sway amplitude, velocity, and regularity were analyzed.

Main Results:

  • Wearing the eye tracker reduced CoP sway amplitude and velocity in anterior-posterior (AP) and medial-lateral (ML) directions.
  • CoP fluctuations became more regular in the ML axis with the eye tracker.
  • Eyes closed condition showed greater sway than fixation and saccades.
  • Horizontal saccades reduced CoP sway velocity compared to fixation.

Conclusions:

  • Head-mounted eye trackers can minimize body sway in young adults during balance tasks.
  • The influence of different visual tasks on postural stability is not significantly altered by wearing an eye tracker.