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Biomechanical motor patterns in normal walking.

D A Winter1

  • 1Department of Kinesiology, University of Waterloo, Ontario, Canada.

Journal of Motor Behavior
|December 1, 1983
PubMed
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Human gait patterns show consistent timing across speeds, with joint angles and support moments remaining invariant. Walking speed is primarily controlled by gain, with motor pattern timing influenced by afferent sensory feedback.

Area of Science:

  • Biomechanics
  • Neuroscience
  • Human Locomotion

Background:

  • Normal human gait exhibits complex motor patterns throughout the stride period.
  • Previous studies have analyzed biomechanical and electromyography (EMG) data to understand gait variations.
  • Understanding gait invariance and speed-dependent changes is crucial for fields like robotics and rehabilitation.

Purpose of the Study:

  • To analyze invariant and speed-dependent motor patterns in human gait.
  • To investigate the control mechanisms underlying walking speed and motor pattern timing.
  • To elucidate the role of afferent control in gait synchronization.

Main Methods:

  • Biomechanical analysis of joint angles, moments, and power across different walking speeds (slow, natural, fast).

Related Experiment Videos

  • Electromyography (EMG) analysis of five key muscles during gait.
  • Correlation analysis between gait parameters, cadence, and walking speed.

    • Main Results:

    • Joint angle patterns and support moments are largely invariant to cadence changes.
    • Ankle moments and support moments remain consistent across all walking speeds.
    • Knee and hip moments show decreased variability with increased cadence.
    • EMG profiles exhibit consistent timing but increased amplitude with higher walking speeds.

    Conclusions:

    • Walking speed is primarily regulated by a gain control mechanism.
    • The precise timing of motor gait patterns is tightly synchronized with anatomical positions.
    • Afferent sensory feedback plays a significant role in controlling the timing of motor patterns during gait.