23 
THE VETERINARY SCIENCE 
with the lower extremity of the tibia, or thigh bone, and 
forms a true articulation of the hock joint. This part is what 
gives most of the motion to the joint. Below these are three 
other small, flat bones, placed one upon the other, having 
articular surfaces between them. These are called the cunei- 
form bones of the hock. Immediately behind these three 
small bones is what is termed the cuboid bone. This bone 
also articulates with the cuneiform bones, helping to form 
the articular surface of the hock. The lower articular sur- 
faces help to give a small amount of motion to the joint. 
This joint is the seat of the disease termed spavin. 
12. Fetlock, Pastern and Coffin Joints are similar to 
those in front leg. 
