ABSTRACT
Although the functions of the palm and sole are different, the topography is similar. The thick plantar skin attaches to the underlying plantar aponeurosis (1), which passes forward from the tuberosity on the posterior aspect of the inferior surface of the calcaneus to attach to the fibrous flexor sheaths of each toe. The aponeurosis sends septa into the foot. These create compartments and give origin to some of the small muscles of the sole. The most important function of the plantar aponeurosis is maintenance of the longitudinal arch. In walking, the toes are forced into dorsiflexion, pulling on the aponeurosis, and in turn pulling on the calcaneus to heighten the arch.
