Navicular bone
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| Navicular bone | |
|---|---|
| Lua error in package.lua at line 80: module 'Module:InfoboxImage/data' not found. Bones of a right human foot, with the navicular labeled at lower right in image. Dorsal view. | |
| Details | |
| Identifiers | |
| Latin | os naviculare |
| Anatomical terms of bone | |
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The navicular bone /nəˈvɪkjʊlər/ is a small bone found in the feet of most mammals.
Human anatomy
The navicular bone in humans is one of the tarsal bones, found in the foot. Its name derives from the human bone's resemblance to a small boat, caused by the strongly concave proximal (i.e., posterior) articular surface. The term navicular bone or hand navicular bone was historically used for the scaphoid bone,[1] 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, distally with the three cuneiform bones, and laterally with the cuboid.
It is the last of the foot bones to start ossification and does not tend to do so until the beginning of the fourth year in typical anatomy, although a large range of variation has been reported.[2]
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The tibialis posterior is the only muscle that attaches to the navicular bone. The main portion of the muscle inserts into the tuberosity of the navicular bone.[3] An accessory navicular bone may be present in 2–14% of the general population.[4][5][6]
Clinical significance
The human navicular is not a commonly broken bone but it breaks due to two reasons. The first mechanism is a stress fracture which happens commonly in athletes,[7] and the other mechanism is a high energy trauma.
The navicular bone is a keystone of the foot: it is part of the coxa pedis and articulates with the talus, first, second and third cuneiform, cuboid and calcaneus. It plays an important role in the biomechanics of the foot, helping in inversion, eversion, and motion; it is a structural link between midfoot and forefoot and it is part of the longitudinal and transverse arch of the foot.
Horse anatomy
Script error: No such module "Labelled list hatnote". The horse has a sesamoid bone called the navicular bone, located within the hoof, that lies on the palmar aspect of the coffin joint between the second phalanx and third phalanx (coffin bone). The navicular bone in the horse is supported by the distal sesamoidean impar ligament and two collateral sesamoidean ligaments. The navicular bursa is located between the flexor surface of the navicular bone and the deep digital flexor tendon, which runs between the bursa and the distal phalanx.[8] 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 from the eponymously labeled bone in humans.[9]
The navicular region is an important structure in relation to lameness, particularly in the front feet, and is involved with a significant disease process called navicular disease or navicular syndrome. Recently much of the original literature concerning navicular disease has been called into question, particularly the significance of radiographic changes as a sole diagnostic criterion.[10] Navicular syndrome may be responsible for as much as 1/3 of all cases of lameness in horses, but radiographic changes in the navicular bone do not always provide a definitive diagnosis. Newer imaging techniques have shown that damage to the soft tissues in the region may be significant contributors to lameness and that multiple causes may result in visible lameness.[8]
See also
Notes
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- ^ Page Module:Citation/CS1/styles.css has no content."Gray's Anatomy, 6b. The Hand. 1. The Carpus. 4". 1918. Retrieved 11 May 2018.
- ^ Page Module:Citation/CS1/styles.css has no content.Louise Scheuer & Sue Black (2004). The Juvenile Skeleton. ISBN 9780080474595.
- ^ Page Module:Citation/CS1/styles.css has no content.Bojsen-Møller, Finn; Simonsen, Erik B.; Tranum-Jensen, Jørgen (2001). Bevægeapparatets anatomi [Anatomy of the Locomotive Apparatus] (in dansk) (12th ed.). p. 293. ISBN 978-87-628-0307-7.
- ^ Page Module:Citation/CS1/styles.css has no content."Top Rated Foot Surgeons - Foot & Ankle Institute in Baltimore- Mercy". Mercy Medical Center.
- ^ Page Module:Citation/CS1/styles.css has no content."Accessory Navicular". 2 June 2020.
- ^ Page Module:Citation/CS1/styles.css has no content.www.mynameiskaan.com. "Macrorad Teleradiology Case Report - SYMPTOMATIC ACCESSORY NAVICULAR BONE".
- ^ Page Module:Citation/CS1/styles.css has no content."Medical Update On Pau Gasol". Milwaukee Bucks. Retrieved 8 December 2019.
- ^ a b Page Module:Citation/CS1/styles.css has no content.R. Wayne Waguespack, DVM, MS, DACVS R. Reid Hanson, DVM, DACVS, DACVECC (December 2010). "Navicular Syndrome in Equine Patients: Anatomy, Causes, and Diagnosis" (PDF). Surgical Views. Auburn University. Archived from the original (PDF) on 21 October 2012. Retrieved 11 January 2013.
{{cite web}}: CS1 maint: multiple names: authors list (link) - ^ Page Module:Citation/CS1/styles.css has no content."Chapter 32, FRACTURE AND LUXATION OF THE TARSUS AND METATARSUS "Textbook of Small Animal Orthopaedics" written by Charles D. Newton, D.V.M., M.S. and David M. Nunamaker, V.M.D. J.B. Lippincott Company, 1985". Archived from the original on 19 January 2013. Retrieved 11 January 2013.
- ^ Citing Clinical Anatomy and Physiology Laboratory Manual for Veterinary Technicians, Colville, Thomas and Bassert, Joanna M. 2008 Publ. Mosby/Elsevier, Canada. "Navicular Bone - The distal sesamoid bone of the horse. The navicular bone is located deep in the hoof behind the joint between the middle and distal phalanges."
External links
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- 3D printable navicular bone model, free download in STL format (Embodi3D.com)
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