Proximal radioulnar articulation
Encyclopedia
The proximal radioulnar articulation (superior radioulnar joint) is a trochoid or pivot joint
between the circumference of the head of the radius and the ring formed by the radial notch
of the ulna
and the annular ligament
.
Pivot joint
A Pivot joint is a type of diarthrosis, or synovial joint. In pivot joints, the axis of a convex articular surface is parallel with the longitudinal axis of the bone.-Movements:...
between the circumference of the head of the radius and the ring formed by the radial notch
Radial notch
The radial notch of the ulna is a narrow, oblong, articular depression on the lateral side of the coronoid process; it receives the circumferential articular surface of the head of the radius....
of the ulna
Ulna
The ulna is one of the two long bones in the forearm, the other being the radius. It is prismatic in form and runs parallel to the radius, which is shorter and smaller. In anatomical position The ulna is one of the two long bones in the forearm, the other being the radius. It is prismatic in form...
and the annular ligament
Annular ligament
The anular ligament is a strong band of fibers, which encircles the head of the radius , and retains it in contact with the radial notch of the ulna....
.
See also
- Distal radioulnar articulationDistal radioulnar articulationThe distal radioulnar articulation is a pivot-joint formed between the head of the ulna and the ulnar notch on the distal radius.-Ligaments:The articular surfaces are connected together by the following ligaments:...
- SupinationSupinationSupination is a position of either the forearm or foot; in the forearm when the palm faces anteriorly, or faces up . Supination in the foot occurs when a person appears "bow-legged" with their weight supported primarily on the anterior of their feet.The hand is supine in the anatomical position...