"it then courses posterior to the clavicle to supply the posterior scapular muscles, where it anastomoses with the rich scapular arterial plexus (scapular anastomosis)."
"transverse cervical artery is a short artery that further bifurcates into the superficial and deep branches, both which course superficially and laterally across the phrenic nerve and anterior scalene muscle; they then cross or pass through the trunks of the brachial plexus, supplying branches to their vasa nervorum. Its branches are:"