Fig. 4From: A modified and enhanced test setup for biomechanical investigations of the hindfoot, for example in tibiotalocalcaneal arthrodesisTest setup for dorsi-/plantarflexion (left) with markers on machine table, tibia, talus and calcaneus embedding. First Principles display (right) showing x-axis in red, y-axis in green and z-axis in blue. a global coordinate system and coordinate system of the Instron machine table; b tibia; c talus; d calcaneus. The black dots represent reference points to create the coordinate systemsBack to article page