It arises from the ulnar artery immediately below the elbow-joint, runs upward between the brachialis and pronator teres muscle and supplies twigs to those muscles.
12.
The ulnar nerve and the ulnar artery run through the ulnar canal, which is deep to the palmar carpal ligament and superficial to the flexor retinaculum.
13.
Some individuals ( about 3 % of the population ) have a " superficial ulnar artery " that runs superficially to the bicipital aponeurosis instead of underneath it.
14.
Running forward, it passes through, occasionally over, the thenar muscles, which it supplies, and sometimes anastomoses with the terminal portion of the ulnar artery, completing the superficial palmar arch.
15.
The proper palmar digital artery for the medial side of the little finger arises directly from the ulnar artery deep to the palmaris brevis muscle, but the rest arise from the common palmar digital arteries.
16.
The palmar branch represents the continuation of the ulnar nerve as it crosses the flexor retinaculum of the hand on the lateral side of the pisiform bone, medial to and a little behind the ulnar artery.
17.
There it supplies one and a half muscles ( flexor carpi ulnaris and the medial half of flexor digitorum profundus ) and courses with the ulnar artery, travelling inferiorly with it deep to the flexor carpi ulnaris muscle.
18.
Releasing pressure on the ulnar artery while keeping the radial artery occluded should return normal skin color to the ulnar side of the palm in one to two seconds, followed by quick restoration of normal color to the entire palm.
19.
It is inserted into the medial side of the base of the first phalanx of digit V . It is separated from the abductor digiti minimi, at its origin, by the deep branches of the ulnar artery and the ulnar nerve.
20.
A medical professional stands at the patient's side with fingers around the patient's wrist and compresses the tissue over both radial and ulnar arteries for a few minutes waiting for the blood to drain from the hand while the patient opens and closes the hand several times.
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