Sternocleidomastoid
sternal head clavicular head
Clavicle
Trapezius
Subclavian vein
C-2 vertebra
Brachial nerve plexus and subclavian artery in thoracic outlet
Acromion process of scapula
Scalenes:
Middle Anterior Posterior
1 st rib
2nd rib
Platę 3-5 The scalene muscles and lateral neck anatomy