Tendon Sheath of Extensor Hallucis Longus
Vagina tendinis extensoris longi hallucis
Read moreStructure
Several tendons originating from muscles in the leg traverse the ankle to enter the foot. They pass beneath retinacula which holds the tendons in place, preventing subluxation. These tendons are covered by modified bursae, called tendon sheaths, which minimize friction with the surrounding structures. The sheaths, composed of both fibrous and synovial layers, wrap around the tendons, ensuring that the tendons can glide over adjacent structures and allow for minimal friction during movement.
Related parts of the anatomy
Anatomical Relations
The tendon sheath of the extensor hallucis longus muscle covers the tendon of this muscle as it travels deep to both the superior and inferior extensor retinaculae, along the anterior aspect of the ankle. The sheath extends as far as the base of the first metatarsal.
Function
The tendon sheath ensures that the tendon of the extensor hallucis longus muscle can glide over adjacent structures and allow for minimal friction during movement. Additionally, the tendon sheath produces synovial fluid, ensuring that the tendon is well lubricated.
