The navicular bone of the horse, also known as the distal sesamoid bone, lies on the palmar aspect of the coffin joint between the second phalanx and third phalanx or pedal bone. It is an important structure in relation to lameness and is involved with a significant disease process called navicular disease. Recently much of the original literature concerning navicular disease has been called into question, particularly the significance of some radiographic changes.
One of the distal tarsals. It normally articulates proximally with the astragalus and distally with one or more of the cuneiforms. See figure at Protocetidae. shaped like a boat. the distal sesamoid in ungulates.
boat shaped" bone of the hand and foot. Also called the "scaphoid". NOTE: In the hand, this bone is prone to develop aseptic necrosis after a fracture. image image image image FX Scaphoid (Carpal Navicular) FX Scaphoid (Carpal Navicular) FX Tarsal Navicular