Hello, As “the plantar shape of the calcaneus is inherently unstable, not stable” [ Kirby KA – “The effect of plantar calcaneal shape on foot biomechanics” in Foot and Lower Extremity Biomechanics, vol. 1], can we discuss about an instantaneous axis of rotation of calcaneus relative to supporting surface ? How this instantaneous axis of rotation of calcaneus relative to supporting surface influence the movement of subtalar joint?
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Calcaneus’ instantaneous axis of rotation ?
