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What is Normal (Hip Drive) Pronation

Discussion in 'Biomechanics, Sports and Foot orthoses' started by Brian A. Rothbart, Jan 22, 2023.

  1. Brian A. Rothbart

    Brian A. Rothbart Well-Known Member


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    Normal Foot Pronation - Observed in the Plantar grade foot
    Also referred to as: Hip Drive Pronation

    Normal (Hip Drive) Foot Pronation. Stance phase Foot motion (pronation/ supination) is driven by the Clockwise, Counterclockwise rotations of the pelvis :
    • Clockwise rotation of the pelvis, pronates the left foot, supinates the right foot
    • Counter-clockwise rotation of the pelvis, pronates the right foot, supinates the left foot
    Gait Analysis - Right Foot

    From Heel Strike to Flat Foot, the pelvis is rotating Counter-clockwise (See Animation Below)
    • This Counter-clockwise rotation pronates the right foot.
    • Foot pronation unlocks the forefoot and allows it to adapt to uneven ground surfaces.
    From Flat Foot to Heel Lift, the pelvis is rotating Clockwise (See Animation Below)
    • This Clockwise rotation supinates the right foot.
    • Foot supination locks the forefoot and allows it to function as a rigid lever at Toe (Push) Off (Zitzlesperger, 1960).
    Zitzlesperger S 1960.The mechanics of the foot based on the concept of the skeleton as a statically indetermined space framework. Clinical Orthopedics, 16:47-63
    Rothbart BA 1973. Part I. Biomechanical analysis of a normal gait pattern. Journal Canadian Podiatry Association, (3):3-7.
    Rothbart BA 1973. Part II. Biomechanical analysis of a normal gait pattern. Journal Canadian Podiatry Association, (4):1-12.

     

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  2. Brian A. Rothbart

    Brian A. Rothbart Well-Known Member

    upload_2023-1-30_9-48-47.png
     

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