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1. Plantar aponeurosis of the foot
As the skin has been removed from the sole the plantar aponeurosis is seen. In it the lateral and the thicker medial part are clearly visible. The latter stretches from the medial tubercle of the calcaneus to the sulcus which separates the toe from the sole; not far from the sulcus it shown its five processes which have been resected. The lateral part arises from the lateral tubercle of the calcaneus and covers the abductor digiti minimi. Close to the medial border of the foot, there is also a portion of the aponeurosis, which partially covers the abductor hallucis.
2. Interosseous muscles of the foot as seen from the sole
The three plantar interosseous muscles and the four dorsal ones are seen. The former arise from the medial sides of the third, fourth and fifth metatarsal bone and are inserted into the medial sides of the base of the proximal phalanges of the same toes. Of the four dorsal interossei the first one occupies entirely the first intermetatarsal space whilst the three others share their spaces with the corresponding plantar interossei. In the model the tendons of some of the leg muscles are also left in situ; one can therefore recognize the tendons of the tibialis posterior on the navicular and medial cuneiform bones, that of the tibialis anterior on the medial side of the medial cuneiform and, at the base of the first metatarsal bone, the tendon of the peroneus longus on th lateral side of these two bones and the tendon of the peroneus tertius on the tubercle of fifth metatarsal bone, and, finally, the tendon of the flexor hallucis longus at the base of the great toe distal phalanx.