Cornual frog

The cornual frog is a triangular structure on the underside of the horse's hoof, covering the digital cushion. It is made of soft, keratinized callus. It is located in the angle formed by the crus of the sole and occupies a central position at the rear of the foot, between the bulbs of the heel.

Its external surface is composed of :

• The base of frog (or glome), 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.

Its internal surface is composed of :

• The two depressions corresponding to the crus of the external surface.

• The spine of frog is a very pronounced central relief that corresponds to the central cuneal groove of the outer surface.