Subcutaneous tissue of corona [Coronary cushion, Un]

The subcutaneous tissue of corona is a germinative region of the hoof responsible for producing the outer hoof wall.

It consists of a specialized epidermis supported by a highly vascularized corium containing numerous dermal papillae, which project into the overlying epidermal layer to form keratinized horn tubules. Deep to this region lies a dense fibroelastic connective tissue framework (sometimes termed the coronal framework) that connects the coronary corium to the digital cushion, ungual cartilages, and the extensor process of the distal phalanx (P3).