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The Ladder Rung Walking Task: A Scoring System and its Practical Application.
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Iterative Spatial Updating During Forward Linear Walking Revealed Using a Continuous Pointing Task.

James J Burkitt1,2, Jennifer L Campos3,4, James L Lyons1

  • 1Department of Kinesiology, McMaster University, Hamilton, ON, Canada.

Journal of Motor Behavior
|April 16, 2019
PubMed
Summary
This summary is machine-generated.

Perception of walking distance is underestimated without vision. This spatial updating process appears linked to gait parameters, specifically the foot swing phase during walking.

Keywords:
Spatial updatingdistance estimationlocomotiononline controlpointing

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Area of Science:

  • Biomechanics
  • Perception
  • Motor control

Background:

  • The continuous pointing task assesses perceived distance during locomotion.
  • Online regulation of distance perception during walking is not fully understood.

Purpose of the Study:

  • To investigate how vision influences perceived distance during continuous walking.
  • To examine the relationship between upper extremity joint angles, gait kinematics, and spatial updating.

Main Methods:

  • Participants performed continuous pointing movements in full vision and no-vision conditions.
  • Upper extremity joint angles and step-cycle kinematics were measured.
  • Shoulder plane of elevation trajectories were analyzed.

Main Results:

  • Perceived distance was underestimated in no-vision trials compared to full vision.
  • Discontinuities in shoulder movement trajectories correlated with perceptual underestimation.
  • These discontinuities were often linked to the early right foot swing phase.

Conclusions:

  • Vision plays a crucial role in accurate perceived distance estimation during walking.
  • Spatial updating during locomotion may occur in discrete steps tied to gait parameters.
  • The findings suggest a coupling between motor execution and perceptual processes.