What part of the radius articulates with the head of the ulna?

The radius articulates proximally at the elbow with the capitulum of the humerus and the radial notch of the ulna. It articulates at its distal end with the ulna at the ulnar notch and with the articular surfaces of the scaphoid and lunate carpal bones.

Which bone articulates with the ulna?

humerus
The ulna is the longest, thinnest bone of the forearm. It articulates proximally with the trochlea of the humerus and with the head of the radius. Distally it articulates with the ulnar notch of the radius and with an articular disk that separates it from the carpal bones.

What is the articulation between the radius and ulna?

The distal radioulnar articulation (inferior radioulnar joint) is a synovial pivot-type joint between the two bones in the forearm; the radius and ulna. It is one of two joints between the radius and ulna, the other being the proximal radioulnar articulation.

What bone does the radial head articulate with?

Anatomy. The radial head articulates with the capitellum of the distal humerus and the ulna (proximal radial ulnar joint). The radial head is a secondary stabilizer of the elbow joint along with the radial and lateral ulnar collateral ligaments and the annular ligament.

Where is radial notch of ulna?

The radial notch is the small articular surface for the radius. It is located along the lateral margin of the coronoid process. g. The shaft (or body) is the long segment of bone between the brachial tuberosity and the inflated distal end of the ulna.

Where is the head of ulna?

The lateral, distal end of the ulna is the head of the ulna. It articulates with the ulnar notch on the radius and with the triangular articular disc in the Wrist Joint.

What inserts on the radial head?

Biceps brachii attaches to the radial tuberosity. Supinator, flexor pollicis longus and the flexor digitorum superficialis attach to the upper third part of the shaft of the radius.

What does the trochlea articulate with?

ulna
The capitulum laterally articulates with the radius; the trochlea, a spool-shaped surface, articulates with the ulna.

What is a radial head?

The radial head is at the top of the radius bone, just below your elbow. A fracture is a break in your bone. The most common cause of a radial head fracture is falling with an outstretched arm.

What articulates the fovea on the radial head?

Anatomical terms of bone

The head of the radius has a cylindrical form, and on its upper surface is a shallow cup or fovea for articulation with the capitulum of the humerus.

What articulates with the head of the humerus?

scapula
At the shoulder, the head of the humerus articulates with the glenoid fossa of the scapula. More distally, at the elbow, the capitulum of the humerus articulates with the head of the radius, and the trochlea of the humerus articulates with the trochlear notch of the ulna.

Where is the Trochlear notch?

The trochlear notch (/ˈtrɒklɪər/), also known as semilunar notch and greater sigmoid cavity, is a large depression in the upper extremity of the ulna that fits the trochlea of the humerus (the bone directly above the ulna in the arm) as part of the elbow joint. It is formed by the olecranon and the coronoid process.

What is the fovea of the radius?

the concave superior surface of the head of the radius that articulates with the capitulum of the humerus.

What is radial head excision?

Radial head excision is a surgical procedure that involves the removal of the radial head (the smaller bone of the forearm that makes up the elbow joint) after severe damage following trauma or as a result of degenerative changes associated with arthritis.

What is a radial head replacement?

Radial head replacement surgery is undertaken on a patient’s elbow following a complex fracture to the radial head where fixation by means other than with screws or a plate is not suitable or feasible. During surgery, the fractured bone and joint surface of the radius is removed and replaced with an artificial implant.

What is ulna trochlear notch?

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. … The lower end of the bone presents a small cylindrical head that articulates with the radius at the side and the wrist bones below.

What is the ulna fovea?

The fovea lies between the ulnar styloid (us) process and the flexor carpi ulnaris (fcu) tendon. Distally, it is bounded by the pisiform (p) bone and proximally by the volar surface of the ulnar head, which in this photo is under the examiner’s index finger pulp.

Does the radius have a head?

All land vertebrates have this bone. In humans it is shorter than the other bone of the forearm, the ulna. The head of the radius is disk-shaped; its upper concave surface articulates with the humerus (upper arm bone) above, and the side surface articulates with the ulna.