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Validation of a multisegment foot and ankle kinematic model for pediatric gait

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4 Author(s)
Myers, K.A. ; Dept. of Biomed. Eng., Marquette Univ., Milwaukee, WI, USA ; Mei Wang ; Marks, R.M. ; Harris, G.F.

This paper reports the development, accuracy, reliability, and validation protocol of a four-segment pediatric foot and ankle model. The four rigid body segments include: 1) tibia and fibula; 2) hindfoot-talus, navicular, and calcaneus; 3) forefoot-cuboid, cuneiforms, and metatarsals; and 4) hallux. A series of Euler rotations compute relative angles between segments. Validation protocol incorporates linear and angular testing for accuracy and reliability. Linear static system resolution is greatest in the Y orientation at 0.10±0.14 mm and 0.05 level of significance and 99.96% accuracy. Dynamic linear resolution and accuracy are 0.43±0.39 mm and 99.8%, respectively. Angular dynamic resolution computes to 0.52±3.36° at 99.6% accuracy. These calculations are comparable to the Milwaukee adult foot and ankle model.

Published in:

Neural Systems and Rehabilitation Engineering, IEEE Transactions on  (Volume:12 ,  Issue: 1 )