Anklebone

Anklebone

The anklebone, also known as the talus bone, is a critical component of the human skeletal system, particularly within the ankle joint. It plays a vital role in the mobility and stability of the foot, allowing for a range of movements necessary for walking, running, and other activities.

Anatomy

The talus is one of the tarsal bones located in the foot. It is situated between the tibia and fibula of the lower leg and the calcaneus (heel bone) below. The talus is unique because it has no muscular attachments, relying entirely on the surrounding ligaments and bones for its stability and function.

Structure

The talus can be divided into three main parts:

• Body: The largest part of the talus, which articulates with the tibia and fibula to form the ankle joint. The superior surface of the body is known as the trochlea, which is dome-shaped and allows for the hinge-like movement of the ankle.

• Neck: A narrow region that connects the body to the head of the talus. It is often the site of fractures due to its relatively thin structure.

• Head: The anterior portion of the talus that articulates with the navicular bone, forming part of the talonavicular joint, which contributes to the foot's ability to adapt to uneven surfaces.

Function

The talus is essential for transmitting the weight of the body from the tibia to the foot. It allows for the dorsiflexion and plantarflexion of the foot, which are crucial movements for walking and running. Additionally, the talus plays a role in the inversion and eversion of the foot, contributing to balance and agility.

Clinical Significance

Fractures

Talus fractures are relatively rare but can occur due to high-impact injuries such as falls or car accidents. These fractures can be challenging to treat due to the talus's limited blood supply, which can lead to complications such as avascular necrosis.

Osteochondral Lesions

Osteochondral lesions of the talus (OLT) are injuries to the cartilage and underlying bone of the talus. These can result from trauma or chronic wear and tear and may cause pain and swelling in the ankle.

See Also

• Ankle joint
• Tarsal bones
• Foot anatomy

External Links

• Talus - Orthobullets
• Anatomy and Function of the Talus - NCBI