Ulnar artery


Ulnar artery

Infobox Artery
Name = PAGENAME
Latin = A. Ulnaris
GraySubject = 152
GrayPage = 595


Caption = Palm of left hand, showing position of skin creases and bones, and surface markings for the volar arches.



Caption2 = Front of right upper extremity, showing surface markings for bones, arteries, and nerves.
BranchFrom = brachial artery
BranchTo = anterior ulnar recurrent artery
posterior ulnar recurrent artery
common interosseous artery (volar, dorsal)
muscular artery
volar carpal
dorsal carpal
deep volar
superficial volar arch
Vein = ulnar vein
Supplies =
MeshName = Ulnar+Artery
MeshNumber = A07.231.114.920
The ulnar artery is the main blood vessel, with oxygenated blood, of the medial aspect of the forearm. It arises from the brachial artery and terminates in the superficial palmar arch, which joins with the superficial branch of the radial artery. It is palpable on the anterior and medial aspect of the wrist.

Along its course, it is accompanied by a similarly named vein or veins, the ulnar vein or ulnar veins.

The ulnar artery, the larger of the two terminal branches of the brachial, begins a little below the bend of the elbow in the cubital fossa, and, passing obliquely downward, reaches the ulnar side of the forearm at a point about midway between the elbow and the wrist. It then runs along the ulnar border to the wrist, crosses the transverse carpal ligament on the radial side of the pisiform bone, and immediately beyond this bone divides into two branches, which enter into the formation of the superficial and deep volar arches.

Relations

Forearm

In its upper half, it is deeply seated, being covered by the Pronator teres, Flexor carpi radialis, Palmaris longus, and Flexor digitorum sublimis; it lies upon the Brachialis and Flexor digitorum profundus.

The median nerve is in relation with the medial side of the artery for about 2.5 cm. and then crosses the vessel, being separated from it by the ulnar head of the Pronator teres.

In the lower half of the forearm it lies upon the Flexor digitorum profundus, being covered by the integument and the superficial and deep fasciæ, and placed between the Flexor carpi ulnaris and Flexor digitorum sublimis.

It is accompanied by two venæ comitantes, and is overlapped in its middle third by the Flexor carpi ulnaris; the ulnar nerve lies on the medial side of the lower two-thirds of the artery, and the palmar cutaneous branch of the nerve descends on the lower part of the vessel to the palm of the hand.

Wrist

At the wrist the ulnar artery is covered by the integument and the volar carpal ligament, and lies upon the transverse carpal ligament. On its medial side is the pisiform bone, and, somewhat behind the artery, the ulnar nerve

Peculiarities

The ulnar artery varies in its origin in the proportion of about one in thirteen cases; it may arise about 5 to 7 cm. below the elbow, but more frequently higher, the brachial being more often the source of origin than the axillary.

Variations in the position of this vessel are more common than in the radial. When its origin is normal, the course of the vessel is rarely changed.

When it arises high up, it is almost invariably superficial to the Flexor muscles in the forearm, lying commonly beneath the fascia, more rarely between the fascia and integument.

In a few cases, its position was subcutaneous in the upper part of the forearm, and subaponeurotic in the lower part.

ee also

*Allen test


=Additional

External links

*
*
*


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • ulnar artery — n an artery that is the larger of the two terminal branches of the brachial artery, runs along the ulnar side of the forearm, and gives off near its origin the anterior and posterior ulnar recurrent arteries * * * a branch of the brachial artery… …   Medical dictionary

  • ulnar artery — noun large artery that branches from the brachial artery to supply the muscles of the forearm and wrist and hand • Syn: ↑arteria ulnaris • Hypernyms: ↑artery, ↑arteria, ↑arterial blood vessel * * * noun : an artery that is the larger of the two… …   Useful english dictionary

  • ulnar artery — a branch of the brachial artery arising at the elbow and running deep within the muscles of the medial side of the forearm. It passes into the palm of the hand, where it unites with the arch of the radial artery and gives off branches to the hand …   The new mediacal dictionary

  • Dorsal carpal branch of the ulnar artery — Artery: Dorsal carpal branch of the ulnar artery Arteries of the back of the forearm and hand. Latin ramus carpalis dorsalis arteriae ulnaris Gray s …   Wikipedia

  • Deep palmar branch of ulnar artery — Artery: Deep palmar branch of ulnar artery Ulnar and radial arteries. Deep view. (Deep volar branch of ulnar labeled at bottom right.) Latin ramus palmaris profundus arteriae ulnaris Gray s …   Wikipedia

  • Palmar carpal branch of ulnar artery — Infobox Artery Name = PAGENAME Latin = ramus carpalis palmaris arteriae ulnaris GraySubject = 152 GrayPage = 598 Caption = Ulnar and radial arteries. Deep view. (Palmar carpal branch of radial artery labeled as volar ulnar carpal , at lower right …   Wikipedia

  • Артерия Локтевая (Ulnar Artery) — ветвь плечевой артерии, которая отходит от нес в локтевой ямке и проходит в локтевой борозде до лучезапястного сустава, переходит на ладонь, где образует поверхностную ладонную дугу, анастомозируя с поверхностной ладонной ветвью лучевой артерии.… …   Медицинские термины

  • ulnar recurrent artery — n either of the two small branches of the ulnar artery arising from its medial side: a) one that arises just below the elbow and supplies the brachialis muscle and the pronator teres called also anterior ulnar recurrent artery b) one that is… …   Medical dictionary

  • Ulnar — can refer to:* Ulnar nerve * Ulnar artery * Ulna …   Wikipedia

  • ulnar vein — n any of several deep veins of the forearm that accompany the ulnar artery and unite at the elbow with the radial veins to form the brachial veins …   Medical dictionary


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.