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Help: 3DGA ankle marker placement for prosthetic feet

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  • Help: 3DGA ankle marker placement for prosthetic feet

    Dear all,

    We are about to begin a study looking at the functional performance between
    three prosthetic feet (SACH, dynamic and multi-axial)using 3D gait analysis
    in our VICON equipped laboratory. We found the following articles with
    description of the ankle marker placement as on the spot corresponding to
    the lateral malleolus on the unaffected side.

    * Sjodahl et al. Kinematic and kinetic gait analysis in the sagittal plane
    of trans-femoral amputees before and after special gait re-education.
    Prosthet Orthot Int 2002; 26: 101-112

    * Bateni and Olney. Effect of weight of prosthetic components on the gait of
    tran-tibial amputees. JPO 2004; 16(4):113-120

    We also found a few similar articles but the authors did not specify the
    location of the ankle maker placement. We want to make sure that maker
    placements are appropriately placed to represent the function of the feet
    design and to avoid potential errors in the kinematics and kinetics
    measurements. So our questions are:

    1. Is there a standard maker placement for prosthetic feet study?

    2. What would be the reasons for choosing the same spot to the lateral
    malleolus on the unaffected side?

    3. Would it be more accurate to place the maker where the approximate ankle
    joint centre/ axis of rotation is located? (As these locations are
    definitely different within the three feet designs and certainly are
    different from the unaffected side)

    Look forward to your responses and will post a summary.


    Tam Nguyen

    Manager, South Australian Movement Analysis Centre

    Department of Rehabilitation & Aged Care

    Repatriation General Hospital

    Daws Rd, DAW PARK, SA 5041



    t: +61 8 8275 2848

    f: +61 8 8275 1130