Posterior Scalene

Written by Max Bidewell

Last updated January 20, 2023 • 4 Revisions

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

Fig 1
The anterior, middle and posterior scalene muscles of the neck

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