The articular surface for the ankle is a wide notch formed by the curved underside of the tibia and the inner surfaces of the medial and lateral malleolus. Now let’s look at the bone that, along with the tibia and fibula, makes up the ankle joint – the talus. This is the talus.
And what bones does the talus articulate with?
The talus is part of a group of bones in the foot collectively called the tarsus. The talus articulates with four bones – the tibia, fibula, calcaneus, and scaphoid. Within the tarsus, it articulates with the calcaneus below and the navicular in front within the talocalcaneonavicular joint.
What joint movements also occur at the joint between the talus tibia and fibula?
The talocrural joint is a synovial hinge joint connecting the distal ends of the tibia and fibula in the lower limb to the proximal end of the talus. The joint between the tibia and the talus carries more weight than that between the smaller fibula and the talus.
And which bone is involved in forming the ankle?
The ankle. The ankle (or talocrural) joint is a synovial joint located in the lower extremity. It is formed by the bones of the leg (tibia and fibula) and foot (talus).
What are the 6 main ligaments of the ankle?
Introduction to the ankle
- medial. delta band. Lig. calcaneonaviculare (spring ligament)
- lateral. Syndesmosis (includes AITFL, PITFL, TTFL, IOL, ITL) Anterior talofibular ligament (ATFL) Posterior talofibular ligament (PTFL) Calcaneal fibular ligament (CFL) Lateral talofibular ligament (LTCL)
Can you fracture your talus?
A talus fracture is a break in one of the bones that make up the ankle. In addition, a fracture of the talus that does not heal properly can lead to serious complications, including chronic pain. Because of this, many fractures of the talus require surgery.
What is the name of the back of the ankle?
The Achilles tendon is a tough band of fibrous tissue that connects the calf muscles to the heel bone (calcaneus ). The Achilles tendon is also called the calcaneus tendon.
What is the function of the talus bone?
The talus bone forms the primary connection between the lower leg and the foot and is vital for mobility. In fact, the structure of the talar bone is so unique that it can provide the connection between numerous other bones such as the tibia, fibula, calcaneus (heel), and the scaphoid or tarsal bones found in the foot.
Is that Hock a hinge or gliding joint?
Synovial joints are characterized by the presence of a joint capsule between the two connected bones. (1) Sliding joints move against each other in one plane. The large sliding joints include the intervertebral joints and the bones of the wrists and ankles. (2) Hinged joints only move in one axis.
Is the talus a joint?
The talus has joints with the two bones of the lower leg, the tibia and the thinner fibula. The talus is the second largest of the tarsal bones; It is also one of the bones in the human body whose surface is most covered by articular cartilage.
How many bones does your foot have?
How is the round bone on your ankle called?
An ankle is the bony prominence on either side of the human ankle. Each leg is supported by two bones, the tibia on the inside (medial) of the leg and the fibula on the outside (lateral) of the leg.
What are the 7 bones in the ankle called? ?
The tarsal bones are 7 in number. They are called the calcaneus, talus, cuboid, navicular, and medial, middle, and lateral sphenoid.
Is the talus a load-bearing bone?
The talus (astragalus) is articulated at the top with the bones of the lower leg to form the hock. The other six tarsi, firmly connected by ligaments below the talus, act as a strong load-bearing platform.
Why do I have two ankle bones?
What is accessory navicular syndrome ? However, some people with this extra bone develop a painful condition known as accessory navicular syndrome when the bone and/or posterior tibial tendon becomes worse. This can result from any of the following: Trauma, such as a foot or ankle sprain.
Which bone is on the side of your foot?
The navicular bone is on the medial (Inside of the foot, between the talus and the front cuneiform bones.
How many bones are in your lower leg?
These are the thighs that sit between the hip and knee joints; the leg , which is between the knee and hock joints; and distal to the ankle, the foot. There are 30 bones in each lower phalanx. These are the femur, patella, tibia, fibula, seven tarsal bones, five metatarsal bones, and 14 phalanges.
What causes talar pain?
A talar fracture usually results from severe trauma to the foot
Injuries that can cause a talar fracture include a fall from a height or a car accident.A severely twisted ankle can also cause that break off small pieces of the talus. If the fracture doesn’t heal properly, you may have trouble walking.
What two bones does the calcaneofibular ligament connect?
The calcaneofibular ligament connects the talus and heel bone of the foot. The ligament is two centimeters long, five millimeters wide and three millimeters thick.
What is a synovial joint?
A synovial joint, also known as diarthrosis, connects bones with a connective tissue joint capsule, the is continuous with the periosteum of the associated bones, forms the outer boundary of a synovial cavity, and surrounds the articulating surfaces of the bones. The joint cavity is filled with synovial fluid.
In which position is the ankle most stable?
The most stable position of the ankle is in dorsiflexion.. If as the foot moves into dorsiflexion, the talus slides back and the wider anterior portion of the talus wedges into the ankle wedge.
What is the tibiotalar joint?
The tibiotalar joint forms the transition between the distal tibia and fibula of the lower leg and the talus. The tibiotalar joint is a diarthrosis and is covered by a thin capsule that inserts at the top of the tibia and ankles and at the bottom of the talus.