SPLINT BONE

Either of the two long, slender bones which run along the back of each cannon bone. The splint bones are attached to the cannon bone by ligaments which eventually ossify and fuse the bones together. The inner splint bone is the second metacar pal in the fore limbs and the second metatarsal in the hinds. The outer splint bone is the fourth metacarpal in the fores and the fourth metatarsal in the hinds.