Ulna

Ulna

The ulna is a long bone found in the lower arm that extends from the elbow to the littlest finger, and when in anatomical position, is found on the average side of the lower arm. It runs parallel to the sweep, the other long bone in the lower arm, and is the bigger and longer of the two.

The bone may break because of unreasonable weight or effect.

The ulna is a long bone found in the lower arm that extends from the elbow to the littlest finger, and when in anatomical position, is found on the average side of the lower arm. It is more extensive near the elbow, and limits as it approaches the wrist.

Near the elbow, the ulna has a hard procedure, the olecranon procedure, a snare like structure that fits into the olecranon fossa of the humerus. This averts hyperextension and structures a pivot joint with the trochlea of the humerus. There is likewise an outspread score for the leader of the range, and the ulnar tuberosity to which muscles connect.

Near the wrist, the ulna has a styloid procedure.

Close to the elbow, the ulna has two bended procedures, the olecranon and the coronoid procedure; and two inward, articular holes, the semilunar and outspread scores.

The olecranon is an extensive, thick, bended greatness, arranged at the upper and back piece of the ulna. It is twisted forward at the summit in order to exhibit a noticeable lip which is gotten into the olecranon fossa of the humerus in expansion of the lower arm. Its base is contracted where it joins the body and the tightest piece of the upper end of the ulna. Its back surface, coordinated in reverse, is triangular, smooth, subcutaneous, and secured by a bursa. Its prevalent surface is of quadrilateral shape, set apart behind by a harsh impression for the addition of the triceps brachii; and in front, close to the edge, by a slight transverse depression for the connection of part of the back tendon of the elbow joint. Its front surface is smooth, curved, and shapes the upper piece of the semilunar score. Its outskirts present continuations of the notch on the edge of the predominant surface; they serve for the connection of tendons: the back piece of the ulnar guarantee tendon medially, and the back tendon along the side. From the average fringe a piece of the flexor carpi ulnaris emerges; while to the parallel outskirt the anconeus is connected.