scalenus posterior muscle

sca·le·nus pos·te·ri·or mus·cle

(skā-lē'nus pos-tēr'ē-ŏr mŭs'ĕl)

Lateral muscle of inferior half of neck; origin, posterior tubercles of transverse processes of fourth to sixth cervical vertebrae; insertion, lateral surface of second rib; action, elevates second rib; nerve supply, cervical and brachial plexuses.
Synonym(s): musculus scalenus posterior, musculus scalenus posticus, posterior scalene muscle.