Nerve and Blood supply of the Shoulder

ARTERIES

  • Axillary artery – begins at the lateral border of the 1st rib as the continuation of the subclavian artery, ends at the inferior border of the the teres major. Passes posteriorly to the pectoralis minor, and becomes the brachial artery after passing the inferior border of the teres major. Branches include:
  • Suprascapular artery
  • Subscapular artery
  • Circumflext scapular artery
  • Thoracodorsal artery
  • Many arterial anastomoses also occur around the scapula between these arteries and the intercostal arteries.
  • The first part of the axillary artery may enlarge (aneurysm) and compress the trunks of the brachial plexus, causing pain and anesthesia.

VEINS

  • Cephalic vein
  • Basilic vein – becomes the axillary vein at the inferior border of the teres major, which then becomes the subclavian vein at the lateral border of the 1st rib.

NERVES

  • Most nerves in the upper limb originate from the brachial plexus, formed from the anterior rami of nerves C5 to T1.

Source: Moore & Dalley

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~ by pcl4 on August 7, 2008.

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