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30 Οκτ 2023 · The radial notch articulates with the circumference of the radial head and forms the proximal radioulnar joint. To learn more about the anatomy of radius and ulna explore our articles, quizzes, video tutorials and labeled diagrams.
Radial Notch – The radial notch is a depression on the ulna that accommodates the medial head of the radius and forms the proximal radioulnar joint. This is the big thing you’ve got to remember about the ulnar notch and the radial notch: They’re names are backwards.
1 Οκτ 2024 · In the medial surface, there is a concavity, called the ulnar notch, which articulates with the head of ulna, forming the distal radioulnar joint. The distal surface of the radius has two facets, for articulation with the scaphoid and lunate carpal bones.
7 Νοε 2020 · The radioulnar joints are two locations in which the radius and ulna articulate in the forearm. The proximal radioulnar joint is located near the elbow, and is an articulation between the head of the radius,and the radial notch of the ulna.
The radial notch of the ulna (lesser sigmoid cavity) 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.
Laterally to the trochlear notch lies the radial notch, which articulates with the head of the radius to form the proximal radioulnar joint. Immediately distal to the coronoid process is the tuberosity of ulna, to which the brachialis muscle attaches.
The ulna has a notched end where it meets your humerus (upper arm bone), a long shaft in the middle that’s slightly curved and a narrow end that meets your wrist. It’s slightly longer than the radius.
