Crural retinaculum of extensors

Within the fibrous system of the dorsal surface of the foot, there are three levels of contentious reinforcements: crural, tarsal, and metatarsal retinaculums, whose disposition varies according to the species.

The retinaculum of crural extensors -formerly 'proximal retinaculum', is constant and the more important. It is a solid fibrous transversal lamina that constitutes the demarcation between the crural fascia and the dorsal fascia of hindfoot. This lamina, attached to the dorsal surface of each malleolus, maintains the tendons of

• tibial cranial muscle,

• long extensor of the digits,

• long extensor muscle of the first digit (Men, Carnivorous, Pigs)

• third fibular muscle (Ruminants, Pigs ans Equidae).