The inferior ulnar collateral artery (anastomotica magna artery) is an
artery
An artery () is a blood vessel in humans and most other animals that takes oxygenated blood away from the heart in the systemic circulation to one or more parts of the body. Exceptions that carry deoxygenated blood are the pulmonary arteries in ...
in the
arm
In human anatomy, the arm refers to the upper limb in common usage, although academically the term specifically means the upper arm between the glenohumeral joint (shoulder joint) and the elbow joint. The distal part of the upper limb between ...
. It arises about 5 cm. above the
elbow
The elbow is the region between the upper arm and the forearm that surrounds the elbow joint. The elbow includes prominent landmarks such as the olecranon, the cubital fossa (also called the chelidon, or the elbow pit), and the lateral and t ...
from the
brachial artery
The brachial artery is the major blood vessel of the (upper) arm. It is the continuation of the axillary artery beyond the lower margin of teres major muscle. It continues down the ventral surface of the arm until it reaches the cubital fossa ...
.
Course
It passes medialward upon the
brachialis
The brachialis (brachialis anticus) is a muscle in the upper arm that flexes the elbow. It lies beneath the biceps brachii, and makes up part of the floor of the region known as the cubital fossa (elbow pit). It originates from the anterior aspec ...
, and piercing the medial intermuscular septum, winds around the back of the
humerus
The humerus (; : humeri) is a long bone in the arm that runs from the shoulder to the elbow. It connects the scapula and the two bones of the lower arm, the radius (bone), radius and ulna, and consists of three sections. The humeral upper extrem ...
between the
triceps brachii
The triceps, or triceps brachii (Latin for "three-headed muscle of the arm"), is a large muscle on the back of the upper limb of many vertebrates. It consists of three parts: the medial, lateral, and long head. All three heads cross the elbow jo ...
and the bone, forming, by its junction with the
profunda brachii
The deep artery of arm (also known as deep brachial artery) is a large artery of the arm which arises from the brachial artery. It descends in the arm before ending by anastomosing with the radial recurrent artery.
Structure
Origin
The deep ...
, an arch above the
olecranon fossa
The olecranon fossa is a deep triangular depression on the posterior side of the humerus, superior to the trochlea. It provides space for the olecranon of the ulna during extension of the forearm.
Structure
The olecranon fossa is located ...
.
Branches and anastomoses
As the vessel lies on the brachialis, it gives off branches which ascend to join the
superior ulnar collateral: others descend in front of the
medial epicondyle, to anastomose with the
anterior ulnar recurrent.
Behind the medial epicondyle a branch anastomoses with the superior ulnar collateral and
posterior ulnar recurrent arteries.
Additional images
File:Gray525.png, The brachial artery.
File:Slide5UUU.JPG, Inferior ulnar collateral artery
References
External links
*
Arteries of the upper limb
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