Hock: anatomy and intrarticular injections

Hock Anatomy and the
Intra-articular Hock Blocks of the Horse

by Robert N. Oglesby DVM

Introduction: Joint Descriptions

The name of the joints and a brief description, starting at the top and working down, is:
  • Tibiotarsal joint, junction of yellow and pale blue in the diagrams below.
    • A hinge type joint, it is responsible for flexion of the hock.
    • The largest joint with extensive joint capsules.
    • When the capsules are distended they are easily seen and referred to by such names as bog spavin and throughpin, for more information.
    • Easily injected
  • Proximal intertarsal joint, junction of pale blue and dark green.
    • Fluid communicates with the tibiotarsal joint.
  • Distal intratarsal joint, junction of dark green and pale green.
    • Difficult to inject
  • Tarsometatarsal joint, junction of pale green and yellow.
    • Can be injected dependably with experience.
This article consists of images and descriptions of the anatomy of the hock, including injection sites and topical landmarks of the hocks structures as they appear on the skin.
                       
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