Navicular bone

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navicular bone is a small bone found in the legs of most mammals.

Video Navicular bone

Human anatomy

The navicular bone in humans is one of the tarsal bones, found in the legs. Its name comes from the resemblance of a human bone with a small boat, which is caused by a highly concrete proximal articular surface. The term navicular bone or the navicular bone of the hand was formerly used for the scaphoid bone, one of the carpal bones of the wrist.

The navicular bone in humans is located on the medial side of the foot, and articulates proximally with the talus, distal with three pointed bones, and laterally with a cube.

This is the last leg bone to begin hardening and is not likely to do so until the end of the third year of girls and the fourth year of the boys, although large variations have been reported.

The posterior tibialis is the only muscle attached to the navicular bone. The main part of the muscle inserts into the tubercosis of the navicular bone. Navicular bone accessory can be found in 2-14% of the general population.

Clinical interests

The navicular man is not a commonly broken bone.

Maps Navicular bone

Horse anatomy

Horses have a sesamoid bone called a navicular bone, located within the nail, which lies in the palmar aspect of the coffin joint between the second phalanx and the third phalanx (coffin bone). The navicular bone in the horse is supported by distal lamoum sesamoidean larynx and two collateral sesamoidean loinamen. The navicular bursa lies between the flexor surface of the navicular bone and the deep digital flexor tendon, which runs between the bursa and the distal phalanx. The central tarsal bone in the hock of the horse is homologous and analogous to the navicular bone of the human foot, and thus the navicular bone in the horse is a different structure than eponyelon-labeled bones in humans.

The navicular region is an important structure in relation to inequality, especially in the forefoot, and is involved with a significant disease process called navicular disease or navicular syndrome. Recently, much of the original literature on navicular disease has been questioned, particularly the significance of radiographic changes as a single diagnostic criterion. The navicular syndrome may be responsible for as many as 1/3 of all cases of lameness in horses, but radiographic changes in the navicular bone do not always provide a definitive diagnosis. More recent imaging techniques have shown that damage to soft tissue in the region can be a significant contributor to inequality and that many causes can cause visible imbalances.

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See also

• Bone terminology
• Term for anatomical location
• Anatomy of the horse's front

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Note

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External links

• 3D models of printed navicular bones, free download in STL (Embodi3D.com) format

Source of the article : Wikipedia