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The navicular bone 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 articular surface. The term ''navicular bone'' or ''hand navicular bone'' was formerly used for the scaphoid bone,〔(【引用サイトリンク】 Gray's Anatomy, 6b. The Hand. 1. The Carpus. 4 )〕 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 end of the second year in girls and the beginning of the fourth year in boys, although a large range of variation has been reported.〔(【引用サイトリンク】 The Juvenile Skeleton )〕 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. An accessory navicular bone may be present in 2–14% of the general population.〔http://footandankle.mdmercy.com/conditions/flatfeet/navicular.html〕〔http://www.wheelessonline.com/ortho/accessory_navicular〕〔http://www.macrorad.com/case-reports/symptomatic-accessory-navicular-bone.html〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Navicular bone」の詳細全文を読む スポンサード リンク
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