This is the same normal study, with structures color coded. The omohyoid, anterior scalene, and levator scapulae muscles are all indicated in brown. The omohyoid is most anterior, the anterior scalene is in the middle, and the levator scapulae is posterior.

Arteries arising from the subclavian and their branches:

yellow-vertebral

dark blue-costocervical trunk and its branches

purple-dorsal scapular

dark green-internal thoracic

red-thyrocervical trunk (branches below)-

green-suprascapular

aqua-transverse cervical

pink-inferior thyroid