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Related Experiment Video

Updated: May 8, 2026

The Lower Body Positive Pressure Treadmill for Knee Osteoarthritis Rehabilitation

The Lower Body Positive Pressure Treadmill for Knee Osteoarthritis Rehabilitation

Published on: July 22, 2019

Vection in depth during treadmill walking.

April Ash¹, Stephen Palmisano, Deborah Apthorp

¹School of Psychology, University of Wollongong, Wollongong, Northfields Avenue, NSW 2522, Australia. aea404@uowmail.edu.au

|August 23, 2013

Summary

This summary is machine-generated.

Treadmill walking reduces the sense of self-motion (vection), while simulated head movements enhance it. This suggests biomechanical cues decrease vection, unlike visual-vestibular information which can increase it.

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Area of Science:

Human Perception
Neuroscience
Biomechanics

Background:

Vection, the sensation of self-motion, is typically studied in stationary observers using visual cues.
Previous research on vection during active locomotion yielded conflicting results regarding its enhancement or impairment.

Purpose of the Study:

To investigate the influence of active treadmill walking and simulated head movements on vection.
To clarify the impact of biomechanical self-motion information versus visual-vestibular cues on vection intensity.

Main Methods:

Two experiments were conducted comparing vection in stationary versus treadmill walking conditions.
Participants viewed radially expanding or contracting optic flow, with head movements either simulated or ignored.

Main Results:

Treadmill walking consistently reduced vection compared to stationary viewing.
Simulated viewpoint jitter (head movements) consistently increased vection compared to constant velocity displays.
The effect of treadmill walking on vection was independent of whether visual and biomechanical self-motion information were consistent.

Conclusions:

Biomechanical information from active self-motion appears to reduce the experience of vection.
Consistent visual-vestibular information about self-acceleration can increase vection.
Head movement simulation enhances vection, highlighting the role of visual flow dynamics.