C-2 vertebra
Scalenes:
Middle
Anterior
Posterior
1 st rib
Vertebral artery
Sternocleidomastoid Middle scalene Anterior scalene
Brachial nerve plexus and subclavian artery in thoracic outlet
2nd rib
Acromion process of scapula
Subclavian vein
Clavicle
Figurę 3-40 Anatomy of the scalenes and the thoracic outlet