Talus bone - wikipedia Talus bone Talus bone Anatomy of the right foot Subtalar Joint, viewed from an angle between lateral and frontal. Details Identifiers Latin Os talus, Astragalus MeSH A02. 835.232. 043.300. 710.780 TA A02. 5.10. 001 FMA 9708 Anatomical terms of bone ( edit on Wikidata ) The talus ( / ˈteɪləs / ; Latin for ankle ), talus bone, astragalus / əˈstræɡələs /, or ankle bone is one of the group of foot bones known as the tarsus. The tarsus forms the lower part of the ankle joint through its articulations with the lateral and medial malleoli of the two bones of the lower leg, the tibia and fibula. Within the tarsus, it articulates with the calcaneus below and navicular in front within the talocalcaneonavicular joint. Through these articulations, it transmits the entire weight of the body to the foot. The second largest of the tarsal bones, it is also one of the bones in the human body with the highest percentage of its surface area covered by articular cartilage. Additionally, it is also unusual in that it has a retrograde blood supply, i.e. arterial blood enters the bone at the distal end. In humans, no muscles attach to the talus, unlike most bones, and its position therefore depends on the position of the neighbouring bones. Contents 1 Structure 1.1 Head 1.2 Neck 1.3 Body 1.4 Development 2 Society and culture 3 Other animals 4 Additional images 5 See also 6 Notes 7 References 8 External links Structure Left talus, from above and below, with anterior side of the bone at top of image. Os trigonum on x-ray. Though irregular in shape, the talus can be subdivided into three parts. Facing anteriorly, the head carries the articulate surface of the navicular bone, and the neck, the roughened area between the body and the head, has small vascular channels. The body features several prominent articulate surfaces : On its superior side is the trochlea tali, which is semi-cylindrical, and it is flanked by the articulate facets for the two malleoli. The ankle mortise, the fork - like structure of the malleoli, holds these three articulate surfaces in a steady grip, which guarantees the stability of the ankle joint. However, because the trochlea is wider in front than at the back ( approximately 5 -- 6 mm ) the stability in the joint vary with the position of the foot : with the foot dorsiflexed ( toes pulled upward ) the ligaments of the joint are kept stretched, which guarantees the stability of the joint ; but with the foot plantarflexed ( as when standing on the toes ) the narrower width of the trochlea causes the stability to decrease. Behind the trochlea is a posterior process with a medial and a lateral tubercle separated by a groove for the tendon of the flexor hallucis longus. Exceptionally, the lateral of these tubercles forms an independent bone called os trigonum or accessory talus ; it may represent the tarsale proximale intermedium. On the bone 's inferior side, three articular surfaces serve for the articulation with the calcaneus, and several variously developed articular surfaces exist for the articulation with ligaments. For descriptive purposes the talus bone is divided into three sections, neck, body, and head. Head The talus bone of the ankle joint connects the leg to the foot. The head of talus 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. Neck The neck of talus is directed anteromedially, 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. Body The body of the talus comprises most of the volume of the talus bone ( ankle bone ). It presents with five surfaces ; a superior, inferior, medial, lateral and a posterior : The superior surface of the body presents, behind, a smooth trochlear surface, the trochlea, for articulation with the tibia. The trochlea is broader in front than behind, convex from before backward, slightly concave from side to side : in front it is continuous with the upper surface of the neck of the bone. the inferior surface presents two articular areas, the posterior and middle calcaneal surfaces, separated from one another by a deep groove, the sulcus tali. The groove runs obliquely forward and lateralward, becoming gradually broader and deeper in front : in the articulated foot it lies above a similar groove upon the upper surface of the calcaneus, and forms, with it, a canal ( sinus tarsi ) filled up in the fresh state by the interosseous talocalcaneal ligament. The posterior calcaneal articular surface is large and of an oval or oblong form. It articulates with the corresponding facet on the upper surface of the calcaneus, and is deeply concave in the direction of its long axis which runs forward and lateralward at an angle of about 45 ° with the median plane of the body. The middle calcaneal articular surface is small, oval in form and slightly convex ; it articulates with the upper surface of the sustentaculum tali of the calcaneus. The medial surface presents at its upper part a pear - shaped articular facet for the medial malleolus, continuous above with the trochlea ; below the articular surface is a rough depression for the attachment of the deep portion of the deltoid ligament of the ankle - joint. The lateral surface carries a large triangular facet, concave from above downward, for articulation with the lateral malleolus ; its anterior half is continuous above with the trochlea ; and in front of it is a rough depression for the attachment of the anterior talofibular ligament. Between the posterior half of the lateral border of the trochlea and the posterior part of the base of the fibular articular surface is a triangular facet which comes into contact with the transverse inferior tibiofibular ligament during flexion of the ankle - joint ; below the base of this facet is a groove which affords attachment to the posterior talofibular ligament. The posterior surface is narrow, and traversed by a groove running obliquely downward and medialward, and transmitting the tendon of the Flexor hallucis longus. Lateral to the groove is a prominent tubercle, the posterior process, to which the posterior talofibular ligament is attached ; this process is sometimes separated from the rest of the talus, and is then known as the os trigonum. Medial to the groove is a second smaller tubercle. Development During the 7 - 8th intrauterine month an ossification center is formed in the anklebone. The talus bone lacks a good blood supply. Because of this, healing a broken talus can take longer than most other bones. One with a broken talus may not be able to walk for many months without crutches and will further wear a walking cast or boot of some kind after that. Society and culture Dice were originally made from the talus of hoofed animals, colloquially known as `` knucklebones ''. These are approximately tetrahedral, leading to the nickname `` bones '' for dice. Modern Mongolians still use such bones as shagai for games and fortune - telling, with each piece relating to a symbolic meaning. Other animals The talus apparently derives from the fusion of three separate bones in the feet of primitive amphibians ; the tibiale, articulating with tibia, the intermedium, between the bases of the tibia and fibula, and the fourth centrale, lying in the mid-part of the tarsus. These bones are still partially separate in modern amphibians, which therefore do not have a true talus. The talus forms a considerably more flexible joint in mammals than it does in reptiles. This reaches its greatest extent in artiodactyls, where the distal surface of the bone has a smooth keel to allow greater freedom of movement of the foot, and thus increase running speed. Additional images Talus - inferior view Lateral view of the human ankle, including the talus Left talus, medial surface. Left talus, lateral surface. See also Squatting facets Knucklebones, a dice game using astragali Shagai Notes Jump up ^ Mosby 's Medical, Nursing & Allied Health Dictionary, Fourth Edition, Mosby - Year Book Inc., 1994, p. 1526 ^ Jump up to : Platzer ( 2004 ), p 216 Jump up ^ Bojsen - Møller, Finn ; Simonsen, Erik B. ; Tranum - Jensen, Jørgen ( 2001 ). Bevægeapparatets anatomi ( Anatomy of the Locomotive Apparatus ) ( in Danish ) ( 12th ed. ). p. 301. ISBN 978 - 87 - 628 - 0307 - 7. Jump up ^ Lee F. Rogers ( 1992 ) Radiology of skeletal trauma - Volume 2 p. 1463 Jump up ^ Thieme Atlas of Anatomy ( 2006 ), p 406 ^ Jump up to : Gray 's Anatomy ( 1918 ) Jump up ^ Pegg, Carole ( 2001 ). Mongolian music, dance and oral narrative : performing diverse identities. ( S.l. ) : Univ. of Washington Press. p. 233. ISBN 9780295981123. Jump up ^ Romer, Alfred Sherwood ; Parsons, Thomas S. ( 1977 ). The Vertebrate Body. Philadelphia, PA : Holt - Saunders International. p. 207. ISBN 0 - 03 - 910284 - X. References This article incorporates text in the public domain from the 20th edition of Gray 's Anatomy ( 1918 ) Platzer, Werner ( 2004 ). Color Atlas of Human Anatomy, Vol. 1 : Locomotor System ( 5th ed. ). Thieme. ISBN 3 - 13 - 533305 - 1. Thieme Atlas of Anatomy : General Anatomy and Musculoskeletal System. Thieme. 2006. ISBN 1 - 58890 - 419 - 9. External links Wikimedia Commons has media related to Talus. Anatomy of the talus by Maurice Laude, Laboratory of Anatomy and Organogenesis, Amiens Medical School Fractures of the Talus at mdmercy.com lljoints at The Anatomy Lesson by Wesley Norman ( Georgetown University ) ( posterioranklejoint ) Illustration at orthoinfo.aaos.org Bones of the human leg Femur upper extremity head fovea neck greater trochanter fossa lesser trochanter intertrochanteric line intertrochanteric crest quadrate tubercle shaft linea aspera upper medial : merges with intertrochanteric line upper intermediate : pectineal line upper lateral : gluteal tuberosity / third trochanter lower extremity adductor tubercle patellar surface epicondyles lateral medial condyles lateral medial intercondylar fossa Tibia upper extremity Gerdy 's tubercle condyles lateral medial intercondylar area posterior anterior intercondylar eminence lateral tubercle medial tubercle shaft tuberosity soleal line lower extremity medial malleolus Anterior colliculus Posterior colliculus fibular notch Fibula lateral malleolus Other patella apex Foot Tarsus calcaneus sustentaculum tali calcaneal tubercle talus navicular cuboid cuneiform medial intermediate lateral Metatarsals 1st 2nd 3rd 4th 5th Other Phalanges GND : 4182598 - 6 Retrieved from `` https://en.wikipedia.org/w/index.php?title=Talus_bone&oldid=799352168 '' Categories : Wikipedia articles incorporating text from the 20th edition of Gray 's Anatomy ( 1918 ) Skeletal system Bones of the lower limb Bones of the foot Tarsal bones Hidden categories : CS1 Danish - language sources ( da ) Medicine infobox template using GraySubject or GrayPage All articles with unsourced statements Articles with unsourced statements from January 2008 Wikipedia articles with GND identifiers Talk Contents About Wikipedia Башҡортса Български Bosanski Brezhoneg Català Čeština Deutsch ދިވެހިބަސް Ελληνικά Español Esperanto Euskara فارسی Français Galego 한국어 Hrvatski Italiano Latina Lietuvių Nederlands 日本 語 Norsk Polski Português Română Русский Simple English Srpskohrvatski / српскохрватски Suomi Svenska Tagalog Türkçe Українська 中文 Edit links This page was last edited on 7 September 2017, at 04 : 50. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: which part of the fibula articulates with the talus
Answer: the lateral and medial malleoli