navicular(redirected from central bone of ankle)
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Flattened, medially placed tarsal bone, concave on its posterior surface to accommodate the head of the talus, and convex on its anterior surface to articulate with the three cuneiform bones.
[L. navicularis, relating to shipping]
navicular/na·vic·u·lar/ (-ler) scaphoid.
1. A comma-shaped bone of the human wrist, located in the first row of carpals.
2. A concave bone of the human foot, located between the talus and the metatarsals. In both senses also called scaphoid.
Shaped like a boat; scaphoid.
navicularadjective Referring or pertaining to the navicular bone.
noun The navicular bone itself.
[scapho- + G. eidos, resemblance]
navicularThe outermost of the wrist (CARPAL) bones on the thumb side in the nearest row. The bone is roughly boat-shaped, hence the name, which is derived from the Latin navis , a boat. Also known as SCAPHOID.
navicularbiconcave tarsal bone; articulates proximally with head of talus and distally with proximal facets of cuneiforms; forms the 'keystone' at height of medial longitudinal arch of foot
boat-shaped; applied to certain bones, such as the navicular bones of the horse's foot and human ankle.
a specially carved block of wood in which a horse's foot is lodged to enable a radiograph of the navicular bone to be taken at a suitable angle.
1. the distal sesamoid bone of a horse's foot; it lies on the palmar side of the coffin joint and serves to change the direction of the deep digital flexor tendon as it inserts on the distal phalanx. Its palmar surface is covered with fibrocartilage, its dorsal surface with hyaline cartilage and its dorsal surface is pocked with a row of nutrient foramina.
2. (rare) the central tarsal bone.
navicular bursa inflammation
in the horse may contain Brucella abortus; a cause of intermittent lameness.
a chronic degeneration of the navicular bone in which there is damage to its flexor surface and the overlying flexor tendon in the front feet of horses. There may be an accompanying navicular bursitis and osteophyte formation. Characterized by intermittent lameness and pointing when the animal is standing. Called also podotrochlitis.