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Head perturbations during walking while viewing a head-fixed target

V E Das1, A Z Zivotofsky, A O DiScenna

  • 1Department of Biomedical Engineering, Department of Veterans Affairs Medical Center, Cleveland, OH, USA.

Aviation, Space, and Environmental Medicine
|August 1, 1995
PubMed
Summary
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Viewing a head-fixed display during walking does not alter head rotation frequencies. However, head velocities in the yaw plane increased when viewing a near target, suggesting visual input minimally impacts head movement characteristics during locomotion.

Area of Science:

  • Neuroscience
  • Biomechanics
  • Human Locomotion

Background:

  • Head-fixed computer displays are increasingly accessible for use during locomotion.
  • These displays offer new possibilities for research and interaction during movement.

Purpose of the Study:

  • To investigate if viewing a head-fixed visual display alters rotational head perturbations during natural walking.
  • To understand the relationship between visual targets and head movement characteristics.

Main Methods:

  • Measured head rotations using a 3-axis angular rate sensor during walking (natural and treadmill).
  • Compared head rotations when viewing a distant stationary target versus a near, head-attached target.
  • Included 10 healthy subjects and 2 patients with vestibular dysfunction.
Keywords:
NASA Discipline NeuroscienceNon-NASA Center

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Main Results:

  • No significant changes in predominant head rotation frequencies were observed between viewing conditions (p > 0.1).
  • Mean peak head velocities were similar, except for increased yaw velocity when viewing the near target (p < 0.005).
  • Pitch head rotation velocities were higher during natural walking compared to treadmill walking (p < 0.05).

Conclusions:

  • Rotational head perturbations during natural walking are largely unaffected by viewing head-fixed targets.
  • Further research is needed on how head perturbations and vestibular eye movements influence vision during locomotion.