3. anastomosis around the surgical neck of humerus[1]

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3. anastomosis around the surgical neck of humerus[1]

  1. 1. ANASTOMOSIS AROUND THE SURGICAL NECK OF HUMERUS ASYA'ARI BIN ARIF AZIMI NAZREEN BIN AZIZUL AZMAN MUHAMMAD FARID BIN MADZLAN
  2. 2. HUMERUS
  3. 3. Humerus <ul><li>The upper end </li></ul><ul><li>The head </li></ul><ul><li>- Glenohumeral joint </li></ul><ul><li>The anatomical neck </li></ul><ul><li>- lies between head and greater and lesser tubercles </li></ul><ul><li>The surgical neck </li></ul><ul><li>- oriented in the horizontal plane between the expanded proximal part of humerus and the narrower shaft </li></ul>
  4. 4. Humerus <ul><li>The greater tubercle and lesser tuberosity </li></ul><ul><li>- serve attachment sites for the four rotatory muscles of the glenohumeral joint </li></ul><ul><li>The bicipital groove </li></ul><ul><li>- seperates lesser and greater tubercles </li></ul>
  5. 5. Anastomosis <ul><li>The term ‘anastomosis’ means the communication between neighbouring vessels. </li></ul><ul><li>Anastomosis may be between arteries and arteries or between arteries and veins. </li></ul>
  6. 6. Axillary Artery <ul><li>The Axillary Artery </li></ul><ul><li>The axillary artery is divided into 3 parts for description. </li></ul><ul><li>The first part is between the lateral border of the first rib and the superior border of the pectoralis minor muscle. </li></ul><ul><li>The second part lies deep to the pectoralis minor muscle. </li></ul><ul><li>The third part extends from the inferior border of the pectoralis minor muscle to the inferior border of the teres major muscle. </li></ul><ul><li>First Part of the Axillary Artery </li></ul><ul><li>This part is enclosed in the axillary sheath along with the axillary vein. </li></ul><ul><li>This part of the axillary artery has only one branch, the superior thoracic artery. </li></ul><ul><li>This artery helps to supply the first two intercostal spaces and the superior part of the serratus anterior muscle. </li></ul>
  7. 7. Axillary Artery <ul><li>Second Part of the Axillary Artery </li></ul><ul><li>This part of the artery lies deep to the pectoralis minor muscle. </li></ul><ul><li>The lateral, medial and posterior cords of the brachial plexus are so named respective to this part of the axillary artery. </li></ul><ul><li>This part of the axillary artery has two branches, the thoracoacromial and lateral thoracic arteries. </li></ul>
  8. 8. Axillary Artery <ul><li>Third Part of the Axillary Artery </li></ul><ul><li>This part extends from the inferior border of the pectoralis minor muscle to the inferior border of the teres major muscle. </li></ul><ul><li>It has three branches, the anterior and posterior circumflex humeral arteries and the subscapular artery. </li></ul>
  9. 9. Formation of anastomosis around surgical neck of humerus <ul><li>1) Anterior circumflex humeral artery </li></ul><ul><li>2) Posterior circumflex humeral artery </li></ul><ul><li>Both are the branches of the 3 rd part of axillary artery. </li></ul>
  10. 11. Anterior circumflex humeral artery <ul><li>Originates from the lateral side of the 3 rd part of axillary artery. </li></ul><ul><li>It passes anterior to the surgical neck of humerus and anastomoses with the posterior circumflex humeral artery. </li></ul><ul><li>It passes deep to the coracobrachialis and the biceps brachii muscles. </li></ul><ul><li>It supplies branches to the surrounding tissues which include the shouder joint and the head of the humerus. </li></ul>
  11. 12. Posterior circumflex humeral artery <ul><li>Originates from the lateralsurface of the 3 rd part of the axillary artery immediately posterior to the origin of the anterior circumflex humeral artery. </li></ul><ul><li>It leaves the axilla by passing through the quadrangular space between the teres major, teres minor, and long head of the triceps brachii muscle and the surgical neck of humerus </li></ul>
  12. 13. <ul><li>It curves around the surgical neck of the humerus and supplies the surrounding muscles and the glenohumeral joint. </li></ul><ul><li>It anastomoses with the anterior circumflex humeral artery and with branches from the profunda brachii, suprascapular, and thoraco-acromial arteries. </li></ul>Posterior circumflex humeral artery
  13. 14. Function <ul><li>Acts as a collateral circulation in cases of obstruction of the blood passage at the axillary artery. </li></ul><ul><li>It connects the 3 rd part of the axillary artery with the brachial artery. </li></ul>
  14. 15. THANK YOU <3

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