External surface

Its external surface of the cornual frog is the one that mekes contact with the ground. It is composed of :

• The base of frog, wide and located towards the rear of the foot, in continuity on either side with the bulbs of the heel.

• The Lateral and medial crus of frog, which extend forward and meet at the apex of frog, located near the center of the solear surface of the foot.

• The central cuneal groove is a depression that separates the two crus.

• The lateral and medial paracuneal groove delimit the frog from the crus of the sole.