The shaft of the tibia is triangular in cross section and has anterior, interosseous, and medial borders and medial, lateral, and posterior surfaces (Fig. 6.85):
The anterior and medial borders and the entire medial surface are subcutaneous and easily palpable.
The interosseous border of the tibia is connected, by the interosseous membrane, along its length to the interosseous border of the fibula.
The posterior surface is marked by an oblique line (the soleal line).