Attached here is the Foot Model which divided the foot into 3-segment (Hindfoot, Forefoot & Toes).
This model was used in this article-
A musculoskeletal foot model for clinical gait analysis. Prabhav Saraswat, Michael S. Andersen, Bruce A. MacWilliams, Journal of Biomechanics, pp-1645-1652, 43(9), 2010.
Prabhav Saraswat
University of Utah