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==Introduction==

==Introduction==

The peroneus tertius is an almonst entirely '''tendinous muscle''' that plays an important part in the [[Equine Hindlimb - Anatomy & Physiology#The Stay Apparatus|

The peroneus tertius is an almonst entirely '''tendinous muscle''' that plays an important part in the [[Stay Apparatus - Horse Anatomy#Reciprocal Mechanism|'''reciprocal apparatus''']] in the hindlimb of the horse. It originates from the extensor fossa of the distal femur, runs over the cranial aspect of the tibia and inserts, after dividing into two, on the fibular, third and fourth tarsal bones and proximal third metatarsus. It '''coordinates flexion of the hock and stifle joints'''.

'''reciprocal apparatus''' in the hindlimb of the horse]]. It originates from the extensor fossa of the distal femur, runs over the cranial aspect of the tibia and inserts, after dividing into two, on the fibular, third and fourth tarsal bones and proximal third metatarsus. It '''coordinates flexion of the hock and stifle joints'''.

Rupture is associated with '''overextension of the hock''' which can occur in foals as a result of dystocia, or in adults struggling to free a trapped limb or in traumatic injury to the region.

Rupture is associated with '''overextension of the hock''' which can occur in foals as a result of dystocia, or in adults struggling to free a trapped limb or in traumatic injury to the region.