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Related Experiment Videos

Turning strategies during human walking.

K Hase1, R B Stein

  • 1Division of Neuroscience, University of Alberta, Edmonton, Alberta T6G 2S2, Canada.

Journal of Neurophysiology
|June 16, 1999
PubMed
Summary
This summary is machine-generated.

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Human walking involves two main turning strategies: the spin turn and the step turn. These strategies combine postural sway and stopping mechanisms for efficient, rapid directional changes.

Area of Science:

  • Biomechanics
  • Human Motor Control
  • Neuroscience

Background:

  • Rapid turning during locomotion is a complex motor task.
  • Understanding turning mechanisms is crucial for rehabilitation and injury prevention.
  • Previous research focused on stopping and postural sway, but not rapid turning during walking.

Purpose of the Study:

  • To investigate the biomechanical and neuromuscular mechanisms of rapid turning during human walking.
  • To identify distinct turning strategies based on leg placement and body mechanics.
  • To analyze the timing and sequence of muscle activation and joint movements during turning.

Main Methods:

  • Subjects walked at a comfortable speed and turned upon receiving an electrical stimulus to the superficial peroneal nerve.

Related Experiment Videos

  • Electromyograms (EMGs), joint angular movements, and foot forces were recorded.
  • The step cycle was divided into 16 phases for detailed analysis of responses.

    • Main Results:

    • Two primary turning strategies were identified: the 'spin turn' and the 'step turn'.
    • The 'step turn' offers a wider base of support and was frequently used for stability.
    • Deceleration involved distal-to-proximal muscle activation, similar to the 'ankle strategy' for postural control.
    • Trunk rotation involved specific muscle activities and pelvic elevation, timed with contralateral foot strike.

    Conclusions:

    • Rapid turning in human walking integrates strategies from stopping and postural control.
    • Two distinct, adaptable turning strategies (spin and step turns) are employed.
    • These findings simplify the understanding of complex turning movements during gait.