Changes

==Introduction==

==Introduction==

The peroneus tertius is an almonst entirely '''tendinous muscle''' that plays an important part in the '''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'''.

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

'''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.

==Clinical signs and diagnosis==

==Clinical Signs ==

The clinical presentation is '''pathognomonic'''.  

The clinical presentation is '''pathognomonic'''.  

Disruption of the tendon allows '''extension of the hock while the stifle is flexed''', which means that as the limb moves forward, the hock joint does not flex. The horse will usually bear weight and pain is not a feature.

Disruption of the tendon allows '''extension of the hock while the stifle is flexed''', which means that as the limb moves forward, the hock joint does not flex. The horse will usually bear weight and pain is not a feature.

The stifle can be flexed, the hock extended, and a characteristic '''dimpling of the gastrocnemius tendon''' can be revealed to diagnose the condition.

The stifle can be flexed, the hock extended, and a characteristic '''dimpling of the gastrocnemius tendon''' can be revealed to diagnose the condition.

Stashak, T. (2002) '''Adams' Lameness in Horses''' ''Wiley-Blackwell''

Stashak, T. (2002) '''Adams' Lameness in Horses''' ''Wiley-Blackwell''

[[Category:To Do - Helen]]

 

[[Category:To Do - Review]]

[[Category:Musculoskeletal Diseases - Horse]]

[[Category:Expert Review - Horse]]