posterior circumflex humeral artery

pos·te·ri·or cir·cum·flex hu·mer·al ar·ter·y

[TA]
origin, axillary; course, passes around posterior aspect of surgical neck of humerus, traversing quadrangular space with axillary nerve; distribution, muscles and structures of shoulder joint; anastomoses, anterior circumflex humeral, suprascapular, thoracoacromial, and profunda brachii.

posterior circumflex humeral artery

an artery that originates from the third part of the axillary artery, leaves the axilla through the quadrangular space in the posterior wall, and enters the posterior scapular region where it supplies related muscles and the glenohumeral joint.

pos·te·ri·or cir·cum·flex hu·mer·al ar·te·ry

(pos-tēr'ē-ŏr sĭr'kŭm-fleks hyū'mĕr-ăl ahr'tĕr-ē) [TA]
Origin, axillary; distribution, muscles and structures of shoulder joint; anastomoses, anterior circumflex humeral, suprascapular, thoracoacromial, and profunda brachii.
Synonym(s): arteria circumflexa humeri posterior, posterior humeral circumflex artery.
References in periodicals archive ?
In up to 30% of the cases, the subscapular artery can arise from a common trunk with the posterior circumflex humeral artery.
This common artery continues distally as the posterior circumflex humeral artery.
6) In the present case the common trunk which further gives rise to the lateral thoracic, thoraco-dorsal, circumflex scapular arteries and continues as the posterior circumflex humeral artery may be considered as the deep brachial artery in accordance with the studies of the previous researchers.
Picture 1: Showing the common trunk arising from the second part of axillary artery showing branches lateral thoracic artery,(1) thoraco-dorsal artery,(2) circumflex scapular artery(3) branching from it and continuation of the artery as the posterior circumflex humeral artery.
The three terminal branches of the collateral artery are posterior circumflex humeral artery, circumflex scapular artery and thoracodorsal arteries.
The posterior circumflex humeral artery descends superficial to the axillary nerve and passed through the quadrangular space.
The fibromuscular slip between the Brachialis and Brachioradialis forms a fibromuscular tunnel underneath which lies the Radial nerve along with descending branch of posterior circumflex humeral artery.
CASE REPORT: We report a case of possible entrapment of Radial nerve and descending branch of posterior circumflex humeral artery due to abnormal fibromuscular tunnel between Brachialis and Brachioradialis on the left side in a middle aged male cadaver.
Ascending or deltoid branch which anastomoses with descending branch of posterior circumflex humeral artery
The posterior circumflex humeral artery which is a branch of the third part of axillary artery passes through the Quadrangular space or humero tricipital foramen (between Teres major, Teres minor, shaft of humerus and long head of Triceps) along with Axillary nerve.
So there is variation of Profunda brachii and posterior circumflex humeral artery with mutual linkage.
The posterior circumflex humeral artery may arise from the profunda brachii artery and pass back below the teres major instead of passing through the quadrangular space (Johnson & Ellis, 2005).

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