Proximal radioulnar articulation
Proximal radioulnar articulation
The proximal radioulnar articulation (pronunciation: prok-si-mal ray-dee-oh-ul-nar ar-ti-kyu-lay-shun) is a joint located in the upper limb of the human body. It is one of the two joints that facilitate the rotation of the forearm and the palm of the hand.
Etymology
The term "proximal radioulnar articulation" is derived from the Latin words 'proximus' meaning 'nearest', 'radius' referring to the 'ray' or 'spoke of a wheel', 'ulna' meaning 'elbow', and 'articulatio' meaning 'joint'.
Anatomy
The proximal radioulnar articulation is a pivot joint that allows for the rotation of the radius around the ulna. This joint is formed by the head of the radius, which is encircled by the radial notch of the ulna and the annular ligament. This articulation allows for the movements of pronation and supination of the forearm.
Related Terms
- Radius: One of the two long bones of the forearm, located on the thumb side.
- Ulna: The other long bone of the forearm, located on the side of the little finger.
- Pronation: The rotation of the forearm and hand so that the palm faces downwards.
- Supination: The opposite of pronation, where the forearm and hand are rotated so that the palm faces upwards.
- Annular Ligament: A strong band of fibers that encircles the head of the radius at the proximal radioulnar articulation.
See Also
External links
- Medical encyclopedia article on Proximal radioulnar articulation
- Wikipedia's article - Proximal radioulnar articulation
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