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Quick foot placement adjustments during gait: direction matters.
Wouter Hoogkamer1, Zrinka Potocanac2, Jacques Duysens2,3
1Department of Kinesiology, Movement Control and Neuroplasticity Research Group, KU Leuven, Tervuursevest 101 bus 1501, 3001, Louvain, Belgium. wouter.hoogkamer@faber.kuleuven.be.
Experimental Brain Research
|August 12, 2015
Summary
Gait stability relies on foot placement adjustments. This study found that long-step gait adjustments are more successful than short-step or side-step adjustments, indicating strategy choice involves balancing environmental factors and individual execution abilities.
Area of Science:
- Biomechanics
- Human motor control
- Gait analysis
Background:
- Foot placement adjustments are crucial for maintaining gait stability and preventing falls.
- Online corrections during walking are more prevalent in daily life than discrete stepping adjustments.
- Understanding rapid foot placement adjustments is key to comprehending dynamic gait stability.
Purpose of the Study:
- To investigate the success of online foot placement adjustments during gait under varying conditions.
- To determine how trajectory adjustment direction and available time influence gait stability.
- To explore the factors influencing obstacle avoidance strategy selection during walking.
Main Methods:
- Utilized an instrumented treadmill with a projector to display virtual stepping stones.
- Manipulated stepping stone trajectories (anterior, posterior, lateral) at different distances.
- Assessed participant success in adapting foot placement with varying time constraints.
Main Results:
- Long-step gait adjustments were performed more successfully than short-step and side-step adjustments.
- The ability to execute movement adjustments was dependent on the direction of the trajectory adjustment.
- Strategy choice for obstacle avoidance is influenced by both environmental constraints and individual execution capabilities.
Conclusions:
- Different leg movement adjustments for obstacle avoidance carry distinct risks.
- Obstacle avoidance strategy selection is a trade-off between environmental demands and individual execution success.
- Gait stability regulation involves complex decision-making processes balancing external factors and internal abilities.
