Summer Session II; Anatomy; Lecture 17; part II; Ankle Joint
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What is the talocrual joint? Give 1 char. When is it the most stable?
- Articulation of the tibia and fiubla with the talus
- Synovial-hinge type
- It is more stable in dorsiflexion than plantar flexion due to a wider talus bone anteriorly than posteriorly.
What are the lateral collateral ligaments of the ankle joint (talocrural)? List them and describe. (3)
three ligaments that attach the lateral malleollus to the talus and calcaneous.
- Anterior talofibular ligament- runs from the lateral malleolus to the neck of the talus.
- Posterior talofibular ligament-runs from the lateral malleolus to the lateral tubercle of the posterior process of the talus.
- Calcaneofibular ligament- runs from the lateral malleolus to the lateral surface of the calcaneuous.
What is another name for the medial collateral ligaments of the talocural joint? Describe it. List them.
- It consists of four parts that attaches the medial malleolus to the talus, calcaneuous and navicular. The parts are named for their bony attachments.
- Anterior tibiotalar ligament
- Posterior tibiotalar ligamentTibionavicular ligament
- Tibiocalcaneal ligament
What is the blood supply to the talocrual joint? Nerve supply?
- Anterior and posterior tibial arteries
- Tibial nerve and deep peroneal nerve.
what is the subtalar joint? Is it synovial? What is the function of the subtalar joint?
- Articulation of the talus and the calcaneuous. Yes;
- Permits inversion and eversion of the foot.
What is another name for the transverse tarsal joint? What two joints does it consist of?
- Midtarsal joint.
- Talocalcaneonavicular and calceocuboid joint.
What kind of joint is the talocalneonavicular joint? What is the name of its ligament? Another name for it? What are its attachments? what is its function?
- Synovial ball and socket joint
- plantar calcaneonavicular ligament; spring ligament
- Band that extends from the sustentaculum tali to the posterior surface of the navicular bone;
- It plays an important role in maintaing the longitudnal arch of the foot. fyi. The plantar aponeurosis also helps with the longitunal arch of the foot.
What are the two ligaments of the synovial calcaneocuboid joint? Describe each of them (attachments and function).
List 4 structures that help with the longitudinal arch of the foot.
- Plantar aponeurosis
- Plantar calcaneonavicular ligament (spring ligament)
- Long plantar ligament
- Short plantar ligament (plantar calcaneocuboid ligament)
list (3) things that support the transverse tarsal joint on the dorsal surface.
- Dorsal talonavicular ligament
- Bifurcated ligaments- Calcaneocuboid and calcaneonavicular
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