The superior ulnar collateral artery (inferior profunda artery), of small size, arises from the brachial

Brachial

Brachial means "pertaining to the arm," and may refer to:*Brachial artery, in anatomy*Brachial valve, the upper valve in Brachiopods...

 a little below the middle of the arm; it frequently springs from the upper part of the a. profunda brachii.

It pierces the medial intermuscular septum

Intermuscular septum

Intermuscular septum can refer to:* medial intermuscular septum of arm* medial intermuscular septum of thigh* lateral intermuscular septum of arm* lateral intermuscular septum of thigh...

, and descends on the surface of the medial head of the Triceps brachii to the space between the medial epicondyle

Medial epicondyle

Medial epicondyle can refer to:* Medial epicondyle of the humerus * Medial epicondyle of the femur...

 and olecranon

Olecranon

The olecranon is a large, thick, curved bony eminence of the forearm that projects behind the elbow.It is situated at the upper end of the ulna, one of the two bones in the forearm...

, accompanied by the ulnar nerve

Ulnar nerve

In human anatomy, the ulnar nerve is a nerve which runs near the ulna bone. The ulnar collateral ligament of elbow joint is in relation with the ulnar nerve. The nerve is the largest unprotected nerve in the human body , so injury is common...

, and ends under the Flexor carpi ulnaris by anastomosing with the posterior ulnar recurrent, and inferior ulnar collateral.

It sometimes sends a branch in front of the medial epicondyle

Medial epicondyle

Medial epicondyle can refer to:* Medial epicondyle of the humerus * Medial epicondyle of the femur...

, to anastomose with the anterior ulnar recurrent.