What is the function of the ulnar notch of the radius?

Ulnar notch (incisura ulnaris) is a mediodistal concavity that allows the radius to pivot around the head of the ulna during pronation and supination of the forearm, wrist, and hand.

What is the name of the notch on the ulna?

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.

Does the ulna have a notch?

The ulna is a long thin bone with a small distal head that bears the styloid process, and an expanded proximal end. The proximal end terminates in the olecranon process and bears the semilunar notch on its upper surface.

Where is the radius bone located in the human body?

forearm
The radius is one of the two bones that make up the forearm, the other being the ulna. It forms the radio-carpel joint at the wrist and the radio-ulnar joint at the elbow. It is in the lateral forearm when in the anatomical position. It is the smaller of the two bones.

What muscles attach to the radius?

Supinator muscle (radial head) attaches to the lateral aspect of the radius, covering a large area of it. Pronator teres muscle also adheres to the radial shaft (below the supinator’s attachment) and inserts on the pronator tuberosity, which is a well-demarcated, rough area.

Where is ulnar notch of radius?

The articular surface for the ulna on the lower extremity of the radius is called the ulnar notch (sigmoid cavity) of the radius; it is narrow, concave, smooth, and articulates with the head of the ulna.

On what bone is the radial notch?

radius
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.

What is the purpose of ulna?

The ulna is a long bone in the forearm. It lies medially and parallel to the radius, the second of the forearm bones. The ulna acts as the stabilising bone, with the radius pivoting to produce movement. Proximally, the ulna articulates with the humerus at the elbow joint.

Where is the radius and ulna located in the body?

The radius and the ulna are long, slightly curved bones that lie parallel from the elbow, where they articulate with the humerus, to the wrist, where they articulate with the carpals. The radius is located laterally, near the thumb, and the ulna medially, near the little finger.

What does a radius bone look like?

It is a long bone, prism-shaped and slightly curved longitudinally. The radius is part of two joints: the elbow and the wrist. At the elbow, it joins with the capitulum of the humerus, and in a separate region, with the ulna at the radial notch. At the wrist, the radius forms a joint with the ulna bone.

Where is the ulnar notch on the radius?

the concave surface on the medial side of the distal end of the radius that articulates with the head of the ulna. ulnar notch. The notch on the distal end of the radius that receives the head of the ulna.

What is the articular surface of the ulna called?

The articular surface for the ulna is called the ulnar notch (sigmoid cavity) of the radius; it is in the distal radius, and is narrow, concave, smooth, and articulates with the head of the ulna forming the distal radioulnar joint. This article incorporates text in the public domain from page 220 of the 20th edition of Gray’s Anatomy (1918)

Where are the radius and the ulna located on the forearm?

The radius and the ulna constitute as the bones of the forearm. The antebrachial region, as it is clinically known, spans the length of the region which extends roughly from elbow to wrist.

Where is the head of the ulna located?

The notch on the distal end of the radius that receives the head of the ulna. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster’s page for free fun content .

What is the function of the ulnar notch of the radius? Ulnar notch (incisura ulnaris) is a mediodistal concavity that allows the radius to pivot around the head of the ulna during pronation and supination of the forearm, wrist, and hand. What is the name of the notch on the ulna? The upper end of…