Contents
What are the anatomical structure of talus?
The talus has been described as having three main components: head, neck, and body. It is an irregular saddle-shaped bone. The talar body has a curved smooth trochlear surface also termed the talar dome, which is covered with hyaline cartilage and convex from front to back.
What supports the head of the talus?
The contact force of the calcaneonavicular ligament against the talus was found to be much smaller than those of other talar articulations; however, its medially oriented direction must contribute to stabilization of the head of the talus against medial displacement.
Does talus have neck?
Neck. The neck of talus is directed anteromedially, and comprises the constricted portion of the bone between the body and the oval head.
What part of the body is the talus?
The talus is the bone that makes up the lower part of the ankle joint (the tibia and fibula make up the upper part). The ankle joint allows your foot to move up and down. The talus also sits above the heel bone (calcaneus).
Where is the head of talus?
The talar head is the part that articulates with the navicular bone. On its inferior aspect, this is continuous with three articular facets that are separated by smooth ridges. There are anterior and middle facets which articulate with corresponding facets on the calcaneus.
Is talus concave or convex?
Midtarsal Joint – For the Talonavicular joint, the concave navicular moves on the convex talus and hence the roll and glide is in the same direction of movement….Arthrokinematics.
| Joint | 1st MTP joint |
|---|---|
| Closed-Packed Position | Hyperextension |
| Open-Packed Position | Slight (10o) extension |
| Concave Surface | Distal – Base of phalanx |
What inserts on the talus?
The talus (plural: tali 4), also known as the astragalus 4, is a tarsal bone in the hindfoot that articulates with the tibia, fibula, calcaneus, and navicular bones. It has no muscular attachments and around 60% of its surface is covered by articular cartilage.
What tarsal is directly anterior to the talus?
Anterior to the talus is the navicular bone, and anterior to this are the medial, intermediate, and lateral cuneiform bones. The cuboid bone is anterior to the calcaneus.
Which ligament is immediately inferior to the head of the talus?
Muscle and ligamentous attachments On the medial side it is held together by a massive ligament, the deltoid ligament, which attaches not only to a broad area on the talus but also to the adjoining bones below and in front.
What are the Arthrokinematics of the ankle?
Arthrokinematics refers to the movement of joint surfaces. Talocrural Joint – The talus rolls within the mortise during dorsiflexion and plantarflexion. During dorsiflexion, the talus rolls anteriorly and it glides posteriorly. While with plantarflexion, the talus rolls posteriorly and glides anteriorly.
What connects tibia to talus?
deltoid ligaments, which attach the tibia to the talus and calcaneus and provide stability to the insides of the ankles.
What are the three parts of the talus?
The talus has been described as having three main components: head, a neck, and a body. The talar body has a curved smooth trochlear surface also termed the talar dome, which is covered with cartilage. Other parts of the talar body include the central portion, the posterior process and the lateral process.
Which is part of the talar body is covered with cartilage?
The talar body has a curved smooth trochlear surface also termed the talar dome, which is covered with cartilage. Other parts of the talar body include the central portion, the posterior process and the lateral process. The talar head is the part that articulates with the navicular bone.
How is the Talar head related to the navicular bone?
The talar head is the part that articulates with the navicular bone. The talar head and body are connected by the talar neck, which is inclined downwards distally and medially. The medial surface of the talar neck has a sulcus, the sulcus tali, that forms the tarsal sinus with the calcaneal sulcus of the calcaneum.
Why is the talus not a muscle attachment?
The talus does not serve as the site of any muscle attachment, which is significant because that means the talus does not have secondary sources of blood supply.