## Overview Complete rupture of the gastrocnemius (and often the superficial digital flexor) disrupts the reciprocal apparatus. The hock drops dramatically when the horse bears weight, and the limb cannot support the body. It is usually caused by a fall with the limb extended under the body. ## Causes Forced extension of a contracting muscle during a fall or slip. ## Diagnosis Characteristic dropped hock, inability to bear weight, and a palpable defect or swelling in the Achilles region. Ultrasound confirms the tear. ## Treatment Supportive care with slings or prolonged external support in selected incomplete cases. Complete rupture of both heads plus the superficial digital flexor carries a grave prognosis. Most complete cases are euthanized. ## Recovery and Prognosis Poor to grave for complete rupture. Incomplete injuries have a better chance with intensive nursing. ## Prevention None specific.
hock drops dramatically when weight-bearing; severe lameness; cannot support weight; swelling or defect in the Achilles area
## Overview Complete rupture of the gastrocnemius (and often the superficial digital flexor) disrupts the reciprocal apparatus. The hock drops dramatically when the horse bears weight, and the limb cannot support the body. It is usually caused by a fall with the limb extended under the body. ## Causes Forced extension of a contracting muscle during a fall or slip. ## Diagnosis Characteristic dropped hock, inability to bear weight, and a palpable defect or swelling in the Achilles region. Ultrasound confirms the tear. ## Treatment Supportive care with slings or prolonged external support in selected incomplete cases. Complete rupture of both heads plus the superficial digital flexor carries a grave prognosis. Most complete cases are euthanized. ## Recovery and Prognosis Poor to grave for complete rupture. Incomplete injuries have a better chance with intensive nursing. ## Prevention None specific.
hock drops dramatically when weight-bearing; severe lameness; cannot support weight; swelling or defect in the Achilles area