TY - JOUR
T1 - A dynamic cadaver model of the stance phase of gait
T2 - Performance characteristics and kinetic validation
AU - Sharkey, Neil A.
AU - Hamel, Andrew J.
N1 - Funding Information:
Funding for this work was providedb y the Whitaker Foundation, grant number RG94-0681. The expert technical support of Michael Drews, Seth Donahue, and Timothy Mosely is graciouslya cknowledged.
PY - 1998/9
Y1 - 1998/9
N2 - Objective. This study was undertaken to evaluate the performance of a new dynamic laboratory model of the stance phase of gait. Design. Five cadaver feet were repetitively tested in the apparatus. Background. Typical biomechanical investigations of cadaver feet simply place a static load on the tibia. The present system was designed to better simulate the changing in-vivo loading environment of the foot and ankle during gait. Methods. The device mimics the behavior of the tibia, foot, and ankle from heel-strike to toe-off by reproducing the physiologic actions of five extrinsic foot muscles and physiologic motion at the proximal tibia. To verify its utility, cadaver gait simulations were conducted while measuring applied muscle forces, ground reaction forces, and plantar pressures. Results. Dynamic muscle forces were consistently delivered to within 10% of pre-programmed values. Dynamic measurements of ground reaction forces and plantar pressure were similar to those measured in healthy human subjects. Peak vertical (y), foreaft (x) and medio-lateral (z) forces were 110, 18, and 4% of body weight respectively. Compressive force in the tibial shaft reached 410% of body weight.
AB - Objective. This study was undertaken to evaluate the performance of a new dynamic laboratory model of the stance phase of gait. Design. Five cadaver feet were repetitively tested in the apparatus. Background. Typical biomechanical investigations of cadaver feet simply place a static load on the tibia. The present system was designed to better simulate the changing in-vivo loading environment of the foot and ankle during gait. Methods. The device mimics the behavior of the tibia, foot, and ankle from heel-strike to toe-off by reproducing the physiologic actions of five extrinsic foot muscles and physiologic motion at the proximal tibia. To verify its utility, cadaver gait simulations were conducted while measuring applied muscle forces, ground reaction forces, and plantar pressures. Results. Dynamic muscle forces were consistently delivered to within 10% of pre-programmed values. Dynamic measurements of ground reaction forces and plantar pressure were similar to those measured in healthy human subjects. Peak vertical (y), foreaft (x) and medio-lateral (z) forces were 110, 18, and 4% of body weight respectively. Compressive force in the tibial shaft reached 410% of body weight.
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U2 - 10.1016/S0268-0033(98)00003-5
DO - 10.1016/S0268-0033(98)00003-5
M3 - Article
AN - SCOPUS:0032168721
SN - 0268-0033
VL - 13
SP - 420
EP - 433
JO - Clinical Biomechanics
JF - Clinical Biomechanics
IS - 6
ER -