Navicular bone
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| Bone: Navicular bone | |
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| The left navicular. Antero-lateral view | |
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| The left navicular. Postero-medial view. | |
| Latin | os naviculare |
| Gray's | subject #63 270 |
| Dorlands / Elsevier | o_07/12598543 |
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The navicular bone is one of the tarsal bones, found in the foot. Its name derives from the bone's resemblance to a small boat, caused by the strongly concave proximal articular surface. The term navicular bone or hand navicular bone was formerly used for the scaphoid bone, one of the carpal bones of the wrist.
It is located on the medial side of the foot, and articulates proximally with the talus, distally with the three cuneiform bones, and occasionally laterally with the cuboid.
As the bones in the foot develop, a particular process is important for the navicular structure. In the early stage, the navicular bone is actually cartilaginous and has to progress and calcify in order to maintain a strong form. There is a condition, however, in which the three cuneiforms that compose the bone do not completely calcify as a unit. In other words, they do not fuse properly, which leads to the most medial third creating a protrusion along the medial arch. This extension of the foot has a tendency to put stress on two tendons and the ligament that run along its side. The tendon of the peroneous brevis muscle which is the most distal of the two tendons, the tendon of the peroneous longus muscle which extends to the posterior of the ankle, and the posterior talofibular ligament which extends upward partway along the calf muscle, can all be potentially affected by this protrusion. Sometimes referred to as an extra navicular bone, this bump can cause wear and tear on the tendons causing sharp pain with increased activity. This condition can be corrected with surgery to file down or remove the protrusion and repair the tendons that were affected.
Resource
Names of the tendons and ligaments retrieved from Wexler, Randell K., M.D. “The Injured Ankle.” American Academy of Family Physicians. 1998 Vol. 57 No. 3. 7 February 2007 <http://www.aafp.org/afp/980201ap/wexler.html>.
See also
Additional images
 Bones of the right foot. Dorsal surface. |
 Bones of the right foot. Plantar surface. |
 Skeleton of foot. Medial aspect. |
 Skeleton of foot. Lateral aspect. |
 Talocalcaneal and talocalcaneonavicular articulations exposed from above by removing the talus. |
 Oblique section of left intertarsal and tarsometatarsal articulations, showing the synovial cavities. |
Bones (Axial skeleton, Appendicular skeleton) | |
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| VERTEBRAL COLUMN | vertebrae (cervical - thoracic - lumbar) - sacrum - coccyx |
| THORAX | sternum - rib |
| cranial bones of SKULL | occipital - parietal - frontal - temporal - sphenoid - ethmoid |
| facial bones of SKULL | nasal - maxilla - lacrimal - zygomatic - palatine - inferior nasal conchae - vomer - mandible - THROAT: hyoid (greater cornu, lesser cornu, body) |
| UPPER EXTREMITY | SHOULDER GIRDLE:clavicle - scapula - ARM: humerus - ulna - radius- HAND:carpals (scaphoid - lunate bone - triquetral - pisiform - trapezium - trapezoid - capitate - hamate) - metacarpals - phalanges (prox - int - dist) |
| LOWER EXTREMITY | PELVIS:pelvis (ilium, ischium, pubis) - LEG: femur - patella - fibula - tibia - FOOT: tarsals (calcaneus - talus - navicular - cuneiform - cuboid ) - metatarsals - phalanges (prox - int - dist) |
| MIDDLE EAR OSSICLES | malleus - incus - stapes |
no:Os navicularesv:Båtben (fot) uk:Ладьєподібна кістка
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
