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Astragalus
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Subtalar JointPNG
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Subtalar Joint
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Talus
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A02835232043300710780
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: ''See
Talus for other meanings of the word''
In
Anatomy , the of the
Ankle joint connects the leg to the foot.
The is the second largest of the
Tarsal Bones .
It articulates with the
Tibia ,
Fibula ,
Calcaneus , and
Navicular .
It occupies the middle and upper part of the tarsus, supporting the tibia above, resting upon the calcaneus below, articulating on either side with the
Malleoli , and in front with the navicular.
It consists of a body, a neck, and a head.
The neck is directed forward and medialward, and comprises the constricted portion of the bone between the body and the oval head.
Its upper and medial surfaces are rough, for the attachment of ligaments; its lateral surface is concave and is continuous below with the deep groove for the
Interosseous Talocalcaneal Ligament .
The head looks forward and medialward; its anterior articular or navicular surface is large, oval, and convex.
Its inferior surface has two facets, which are best seen in the fresh condition.
The medial, situated in front of the middle calcaneal facet, is convex, triangular, or semi-oval in shape, and rests on the
Plantar Calcaneonavicular Ligament ; the lateral, named the anterior calcaneal articular surface, is somewhat flattened, and articulates with the facet on the upper surface of the anterior part of the calcaneus.
