What is the styloid process of the ulna?
There’s a bony projection at the end of the ulna, near your hand, called the ulnar styloid process. It fits into the cartilage of your wrist joint and plays an important role in the strength and flexibility of your wrist and forearm. Any sort of break in this area is called an ulnar styloid fracture.
Where are the styloid processes of the radius and ulna?
In conclusion, the ulnar styloid process is located at nearly the ulnar-most (the opposite side of the humerus with the elbow flexed) and slightly dorsal aspects of the ulnar head in the axial plane view obtained in neutral forearm rotation.
Is ulnar styloid process palpable?
The distal end is expanded into a readily palpable styloid process and head on the ulnar side of the wrist. The head has a smooth distal and a convex lateral articular surface which articulates with the ulnar notch of the radius at the distal (inferior) radioulnar joint.
What are the 4 processes of the ulna?
To enable movement at the elbow joint, the ulna has a specialised structure, with bony prominences for muscle attachment. Important landmarks of the proximal ulna are the olecranon, coronoid process, trochlear notch, radial notch and the tuberosity of ulna: It is where the brachialis muscle attaches.
What is the end of your ulna called?
The upper end of the ulna presents a large C-shaped notch—the semilunar, or trochlear, notch—which articulates with the trochlea of the humerus (upper arm bone) to form the elbow joint.
How long does it take for a ulna fracture to heal?
A stable, simple and isolated fracture of the ulna (secondary to a direct blow) can be treated with a cast for about four to six weeks. Your doctor will closely follow your progress with X-rays to assure nondisplacement of the fracture and proper bone healing.
Are there cases of painful unfused separate ossification centers of the ulnar styloid?
Asymptomatic unfused separate ossification centers in bilateral ulnar styloids were reported in one individual.’ To our knowledge, painful unfused separate ossification centers of the ulnar styloid have not been reported. Case Report A 27-year-old man suffered a left wrist sprain.
How old is the distal end of the ulnar styloid?
Of 800 wrists, 1 person had bilateral unfused separate ossification centers for the ulnar styloid that were asymptomatic. The ossification center of the distal end of the ulnar appears at 4-7 years of age, and that of the ulnar styloid appears at 7 or 8 years of age.
How is the head separated from the styloid process?
Ulnar styloid process. The head is separated from the styloid process by a depression for the attachment of the apex of the triangular articular disk, and behind, by a shallow groove for the tendon of the extensor carpi ulnaris muscle . Ulnar styloid fractures seldom require treatment when they occur in association with a distal radius fracture.
Can a long styloid process cause pain in the wrist?
An excessively long styloid process of the ulna can cause painful contact with the triquetral bone in the wrist, known as ulnar styloid impaction syndrome. Radiology is used to diagnose it. Conservative management involves injection of triamcinolone, while surgery involves shortening of the styloid process of the ulna via resection.