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Updated: Jun 30, 2026

Controlled Rotation of Human Observers in a Virtual Reality Environment
Published on: April 21, 2022
Podokinetic after-rotation in a simulated reduced gravity environment.
Michael J Falvo1, Fay B Horak, Gammon M Earhart
1Program in Physical Therapy, Washington University School of Medicine, Saint Louis, MO 63108, USA.
Body weight support (BWS) did not affect podokinetic after-rotation (PKAR), an adaptive response to stepping on a rotating surface. This suggests that lower extremity load receptors are not critical for this locomotor adaptation.
Area of Science:
- Human physiology
- Neuroscience
- Biomechanics
Background:
- Stepping on a rotating platform induces podokinetic after-rotation (PKAR), causing involuntary rotation when stepping in place without vision.
- Load receptor input is crucial for normal locomotion.
Purpose of the Study:
- To investigate the role of lower extremity load receptors in PKAR.
- To determine if manipulating body weight support (BWS) influences PKAR.
Main Methods:
- Eleven healthy females participated in a study involving stepping on a rotating treadmill.
- Participants experienced four conditions of body weight support (BWS) during stimulation and response phases.
- Trunk angular velocity was measured during the response phase to quantify PKAR.
Main Results:
- No significant differences in PKAR parameters were observed across the different BWS conditions.
- Body weight support, whether applied during stimulation, response, or both, did not influence PKAR.
Conclusions:
- Load receptors in the lower extremities may not play a significant role in the adaptive changes of locomotor trajectory control.
- The findings suggest that other sensory inputs are more critical for mediating PKAR.
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Published on: August 22, 2025
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