The posterior scalene is one of the scalene muscles of the neck. It is the smallest and the deepest of the scalene muscles. Attachments: Originates from the posterior tubercles of the transverse processes of C5-C7 and attaches into the second rib. Function: Elevation of the second rib, and ipsilateral lateral flexion of the neck. Innervation: Anterior rami of C6-C8. Blood Supply: Ascending cervical branch of inferior thyroid artery By TeachMeSeries Ltd (2025) Fig 1The anterior, middle and posterior scalene muscles of the neck Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Print Article Rate This Article