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Different Types of Visual Perturbation Induced Different Demands and Patterns in Active Control: Implication for
Muchen Ren1, Tangdi Lin1, Jung Hung Chien2
1Department of Health and Rehabilitation Science, College of Allied Health Professions, University of Nebraska Medical Center, Omaha, NE, United States.
Frontiers in Physiology
|August 1, 2022
Summary
Novel sensorimotor training using visual perturbations enhances active control. Both reduced visual capability (Vre) and perturbed optic flow (Vpe) walking conditions increase demands, suggesting their utility for astronaut training.
Area of Science:
- Human movement science
- Neuroscience
- Space medicine
Background:
- Sensorimotor training with visual perturbations is crucial for astronaut adaptation.
- Existing methods may lack sufficient intensity for long-term adaptation.
- Novel pseudo-random visual perturbations are explored to enhance training efficacy.
Purpose of the Study:
- To develop a new sensorimotor training paradigm using pseudo-random visual perturbations.
- To analyze active control demands and patterns under varied visual conditions.
- To evaluate the effectiveness of reduced visual capability (Vre) and perturbed optic flow (Vpe) for training.
Main Methods:
- Thirty healthy adults participated in a controlled walking experiment.
- Four conditions were tested: no optic flow (NoOptic), optic flow (Optic), reduced visual capability (Vre), and perturbed optic flow (Vpe).
- Key gait parameters including step length and width variability, and ellipse area were measured.
Main Results:
- Both Vre and Vpe conditions significantly increased step length and width variability compared to the Optic condition.
- Ellipse area, representing overall gait stability, was significantly larger in Vre and Vpe conditions.
- These findings indicate heightened sensorimotor demands under altered visual input.
Conclusions:
- Walking under reduced visual capability (Vre) and perturbed optic flow (Vpe) necessitates greater active control.
- Both Vre and Vpe are viable for sensorimotor training, particularly for astronauts.
- Vre is recommended as a primary training option, provided trip hazards are managed.
