Ulna Bone Anatomy

The ends of the radius and ulna join bones at the hand to form the wrist which is formally known as the carpus. It is widest at its proximal end and narrows considerably at its distal end.

Radius And Ulna Anatomy Forearm Bones Pluse Free Anatomy Quiz

The ulna articulates with only two bones joining with the humerus and the proximal end of the radius on its proximal end and the distal end of the radius on its distal end 2.

Ulna bone anatomy. At its proximal end the ulna forms the hinge of the elbow joint with the humerus. The ulna is one of two bones that give structure to the forearm. Together with the bones in the palm of the hand these bones form three rows.

Radius and ulna bone quiz for anatomy and physiologythis unlabeled quiz of the radius and ulna bone will test your knowledge on how to label the structures of these bones. Proximally the ulna articulates with the humerus at the elbow joint. The ulna is located on the opposite side of the forearm from the thumb.

The long bone can be divided into three parts the proximal or upper end shaft and the distal or lower end 6. The ulna is the longer and larger of the two bones residing on the medial pinky finger side of the forearm. The other shorter bone of the forearm is the radius the upper end of the ulna presents a large c shaped notchthe semilunar or trochlear notchwhich articulates with the trochlea of the humerus upper arm bone to form the elbow joint.

The ulna acts as the stabilising bone with the radius pivoting to produce movement. Monteggia fracture a fracture of the proximal third of the ulna with the dislocation of the head of the radius. It joins with the humerus on its larger end to make the elbow joint and joins with the carpal bones of the hand at its smaller end.

At the wrist the radius articulates with the proximal row of carpal bones to form an ellipsoidal joint. Hume fracture a fracture of the olecranon with an associated anterior dislocation of the radial head. Distally the ulna articulates with the radius forming the distal radio ulnar joint.

You will be required to label the ulnar notch styloid process of ulna trochlear notch proximal radioulnar joint olecranon process coronoid process distal radioulnar joint etc. Together with the radius the ulna enables the wrist joint to rotate. Ulna inner of two bones of the forearm when viewed with the palm facing forward.

Anatomy of the ulna bone different parts of ulna and the joints formed by them. Specific types of ulna fracture include. Introduction to the radius and ulna bones anatomy the junction between the humerus and radius is a hinge joint which permits flexion and extension movements front to back of the elbow.

Radius Bone Anatomy