Annular ligament
Annular Ligament
The Annular Ligament (pronunciation: /ˈan.jʊ.lər ˈlɪɡ.ə.mənt/) is a significant anatomical structure in the human body, particularly in the elbow joint.
Etymology
The term "Annular Ligament" is derived from the Latin word "annulus" which means "ring", and "ligamentum" which means "bandage". This is due to the ligament's ring-like structure that encircles the head of the radius bone in the forearm.
Anatomy
The Annular Ligament is a strong band of fibers that encircles the head of the radius, one of the two bones in the forearm. It forms a pivot that allows the radius to rotate during forearm movements. The ligament is attached anteriorly and posteriorly to the ulna, the other bone in the forearm.
Function
The primary function of the Annular Ligament is to hold the radius in place, allowing it to rotate during pronation and supination of the forearm. This rotation is crucial for many daily activities, such as turning a doorknob or using a screwdriver.
Related Terms
- Radius: One of the two bones in the forearm, around which the Annular Ligament wraps.
- Ulna: The other bone in the forearm, to which the Annular Ligament is attached.
- Pronation: The rotation of the forearm that the Annular Ligament facilitates.
- Supination: The opposite rotation to pronation, also facilitated by the Annular Ligament.
See Also
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