ANNULAR LIGAMENTS OF THE TARSUS Meaning and
Definition
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The annular ligaments of the tarsus are a group of connective tissue structures located in the foot, specifically in the ankle region. They form a series of rings or bands that encircle and hold certain tendons and nerves in place within the foot. The word "annular" refers to the shape of these ligaments, which resemble rings or circles.
There are four main annular ligaments in the tarsus: the superior extensor retinaculum, the inferior extensor retinaculum, the superior peroneal retinaculum, and the inferior peroneal retinaculum.
The superior extensor retinaculum is located on the top of the foot and forms a supportive band for the tendons of the extensor muscles, which control the movement of the toes and foot. The inferior extensor retinaculum is situated on the lower part of the foot and aids in the containment of the tendons that extend the toes.
The superior and inferior peroneal retinacula are found on the outer side of the foot and function to hold the tendons of the peroneal muscles in place. These muscles are responsible for the movement and stability of the foot and aid in eversion (rolling the foot outwards) and plantarflexion (pointing the foot downwards).
Overall, the annular ligaments of the tarsus are crucial for maintaining the proper alignment and stability of tendons and nerves within the foot, allowing for efficient and coordinated movement.
