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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. It is concave from before backward, and its prominent extremities serve for the attachment of the annular ligament.
The radial notch 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. It is concave from before backward, and its prominent extremities serve for the attachment of the annular ligament.
The radial notch is the smooth, oval, articular indentation found along the lateral aspect of the coronoid process of ulna. Its anterior and posterior margins provide attachment sites for the annular ligament of the radius.
30 Οκτ 2023 · On the lateral aspect of the proximal ulna and just distal to the trochlear notch lies the shallow, rounded depression called the radial notch. The radial notch articulates with the circumference of the radial head and forms the proximal radioulnar joint.
18 Νοε 2022 · The DRUJ is a pivot joint between the distal radius and ulna that allows forearm rotation in conjunction with grasping function of the hand. Its osseous components are the radial sigmoid notch; the ulnar head, consisting of the hub and seat; the fovea; and the styloid (Fig 1) (1).
The anterior segment of the RNU showed values of 10 ± 2 mm (range, 5–14 mm) proximally and 11 ± 2 mm (range, 6–17 mm) distally; the middle segment showed 12 ± 2 mm (range, 7–17 mm) proximally and 13 ± 2 mm (range, 9–18 mm) distally.
3 Νοε 2023 · The proximal radioulnar joint is a synovial joint that connects the proximal ends of the radius and ulna. In this joint, the circumferent head of radius is placed within the ring formed by the radial notch of ulna and the annular ligament. This configuration makes this joint a pivot joint.
