The Foot Feet: Bones, Muscles, and Flesh Markings (Plate 18).
On the base of the foot there is a deep arch on the inner side and a very slight one on the outside (Figs, i and 2). The arch of the foot becomes flatter as pressure is put upon it (see dotted lines in Fig. 1). There are three equal divisions on the base of the foot, dividing it into the ball of the big toe, the arch of foot, and the heel space (Fig. 6).
In blocking the profile, note plan A, Fig. 6, adding small toes according to inner or outer view (see also Fig. 5). Note that these shapes are based on the onion, and that the joints of the toes form on the same principles as the hand, in radiating lines.
Toes. The big toe turns slightly upwards. Small toes turn down. The little toe does not touch the ground, so the outline over that part is a rounded line (Fig. 5, also Plate 19, Figs. 4 and 5).
The foot can act independently of leg movement (Figs. 1 and 2).
From extreme tip of foot to ankle joint is half the distance from ankle to hollow beneath knee (Fig. 10). The base of the foot resembles a sock in form, and can be easily placed in entwining onions (Fig. 8), the deep arch on inner side being allowed for. The finished sketch is shown at Fig. 9 ; note balls of big and little toes, and heel, also the indication of the hollow of the inner arch. Toes are placed on the radiating line, becoming smaller towards the outer side of foot.
The inner ankle (Fig. 6), the tibia bone C, stands high on
the foot, and is pointed in character, showing strongly in flesh marking.
The outer ankle (Fig. 5) shows the fibula bone B, which is lower on the foot and more rounded in outline. This also is near the flesh and shows its shape (Fig. 2).
Bones of the foot (Fig. 1) are as follows
C : Os calcis (heel).
D : Astragalus.