In a subclan aery block at outer border of 1st rib, all of the following aeries help in maintaining the circulation to upper limb, EXCEPT?
A rich anastomosis exists around the scapula between branches of subclan aery (first pa) and the axillary aery (third pa). This anastomosis provides a collateral circulation through which blood can flow to the limb when the distal pa of subclan aery or the proximal pa of axillary aery is blocked. Scapular anastomoses occur between the following branches of proximal subclan and distal axillary aery: Branches of Subclan aery: Thyrocervical trunk, Suprascapular and Deep branch of transverse cervical.Branches of Axillary aery: Subscapular, Posterior circumflex humeral and Thoracoacromial aeires.
Subscapular aery
Superior thoracic aery
Thyrocervical trunk
Suprascapular aery