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Visually-controlled leg movements embedded in a walking task
1Department of Industrial Engineering, State University of New York, Buffalo 14260.
Ergonomics
|April 1, 1995
Summary
Alternating leg movements in walking, a visually controlled task, were faster than reciprocal tapping. This suggests learning and reduced direction changes enhance leg movement speed under specific accuracy demands.
Area of Science:
- Biomechanics
- Motor Control
- Human Movement Analysis
Background:
- Accurate alternating leg movements are crucial for effective walking.
- Understanding the visual control mechanisms in locomotion is essential for gait analysis and rehabilitation.
Purpose of the Study:
- To investigate the speed and control of alternating leg movements during visually guided target aiming.
- To compare the speed of visually guided leg movements with reciprocal tapping tasks.
Main Methods:
- Nine subjects performed alternating foot aiming tasks at targets with varying amplitudes and widths (Index of Difficulty 2.59–6.16).
- Movement time was recorded and compared to arm and leg reciprocal tapping tasks.
Main Results:
- Alternating target aiming tasks for the legs were significantly faster than reciprocal tapping tasks.
- Movement time decreased with increased target width and decreased amplitude.
- Data suggests learning and elimination of direction changes contribute to faster movements.
Conclusions:
- Visually controlled alternating leg movements in a target aiming task are highly efficient.
- Normal walking likely relies on visual control only for high-accuracy requirements (target size < 300 mm).
- Findings have implications for understanding gait control and designing interventions for movement disorders.