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The Middle Scalene is a member of the Scalene Group, which is composed of the:
- Anterior scalene
- Middle scalene
- Posterior scalene
- The middle scalene attaches from the transverse processes of the cervical spine to the first rib.
- The superior attachments are onto the posterior tubercles of the transverse processes of C2-C7.
- Flexes the neck at the spinal joints.
- Laterally flexes the neck at the spinal joints.
- Elevates the first rib at the sternocostal and costospinal joints.
- A middle scalene is the largest of the three members of the scalene group.
- Although anterior scalene syndrome (a version of thoracic outlet syndrome) is named for the anterior scalene, a tight middle scalene can also contribute to this condition.