What is the ulna?
What is the ulna?
What is the ulna?
The ulna is one of two bones that make up the forearm, the other being the radius. It forms the elbow joint with the humerus and also articulates with the radius both proximally and distally. It is located in the medial forearm when the arm is in the anatomical position. It is the larger of the two forearm bones.
What side is the ulna on?
The forearm consists of two bones, the radius and the ulna, with the ulna is located on the pinky side and the radius on your thumb side.
Where is the ulna and radius located?
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 is shaft of ulna?
ARM: HUMERUS, RADIUS, & ULNA Most of the ulnar shaft is triangular. The ulnar shaft only becomes round in cross section at its distal end. In contrast, the radial shaft is circular proximally and is a rounded triangle at midshaft.
What is the main function 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.
What is the function of ulna?
How do I know if I broke my ulna?
Symptoms
- Swelling.
- Bruising (not as common as in other broken bones)
- Inability to rotate arm.
- Numbness or weakness in the fingers or wrist (rare)
What is the bump on the ulna called?
Lateral Epicondylitis (Tennis Elbow) The elbow joint is made up of the bone in the upper arm (the humerus) and one of the bones in the lower arm (ulna). The bony prominences, or bumps, at the bottom of the humerus are called the epicondyles. The bump on the outer side of the elbow is called the lateral epicondyle.
What is the function of radius and ulna?
Function. The radius’ main functions are to articulate with the ulna and humerus at the elbow to provide supination and pronation. Then to articulate with the lunate and scaphoid to provide all the movements of the wrist.