A unique feature is a lack of the olecranon process on the ulna.

In the lower arm the robust ulna has a well-developed olecranon process.

The part of the ulna that protrudes back to form the elbow, known as the olecranon process.

The olecranon process was highly enlarged indicating the forelimb had powerful muscles.

The anconeus muscle can easily be palpated just lateral to the olecranon process of the ulna.

Fractures of the kneecap and the olecranon process of the elbow are commonly treated by this method.

However, even in extreme cases of fusion, such as in horses, the olecranon process is still present, albeit as a projection from the upper radius.

The measuring point is half way between the olecranon process of the ulna and the acromion process of the scapula.

Unusual prominence of olecranon process but because it is a supracondylar fracture, the three bony point relationship is maintained, as in a normal elbow.

Maximum elbow flexion and extension is made possible because the two fossae accommodates to coronoid and olecranon processes.

The ulnar nerve runs in the groove between the medial humeral epicondyle and the olecranon process of the ulna.

Fossil Keichousaurus display a simplified elbow joint and a lack of ossification in the olecranon process of the ulna.

The forelimbs of this species had a reduced olecranon process, a deep humeral trochlea, and the loss of the entepicondylar foramen.

The stab is accomplished by placing the olecranon process of the elbow firmly against the bones or tensed muscles of the abdomen, side, or back.

Moreover, it has a large olecranon process on the ulna which projects backward past the elbow, giving a large area for the insertion of the triceps muscle.

Typothorax also possesses a relatively long olecranon process for the insertion of the M. triceps muscle, but not as long as those of digging animals.

Proximally, the ulna has a bony process, the olecranon process, a hook-like structure that fits into the olecranon fossa of the humerus.

These tophi occur in 30% of those who are untreated for five years, often in the helix of the ear, over the olecranon processes, or on the Achilles tendons.

The arm had a short humerus and also the lower arm was short and elegant with an ulna showing only a weakly developed olecranon process on its back upper end.

It has been suggested that blind mole rats may have evolved from spalacids that used their front limbs to dig, because their olecranon process is relatively large relative to the rest of the arm.

The length of the forelimb compared to the hindlimb suggests that Heterodontosaurus might have been partially quadrupedal, and the prominent olecranon process and hyperextendable digits of the forelimb are found in many quadrupeds.

There are short curved ulnae with olecranon processes, and a possible scapula with bent shaft, and the cervicals have profiles and aspects to their exterior that are very similar to the Megalancosaurus cervical series.

The three known ulnae show that the olecranon process at the proximal (near) end is well-developed, but the distal end is narrow; the morphology of the bone suggests that the animal was capable of producing much force with its arms.

Holtz and Osmólska (2004) diagnosed the clade Maniraptora based on the following characters: reduced or absent olecranon process of the ulna, greater trochanter and cranial trochanter of the femur fused into a trochanteric crest.

The well-developed deltopectoral crest (a ridge for the attachment of chest and shoulder muscles) of the humerus and prominent olecranon process (where muscles that extend the forearm were attached) of the ulna indicate that the forelimb was powerful as well.