The anterior vertebral muscles. (Scalenus medius visible at bottom center-right in red.)
Muscles of the neck. Scalenus medius shown in red.
|Latin||Musculus scalenus medius|
|Posterior tubercles of the transverse processes of the lower six cervical vertebræ (C2, C3, C4, C5, C6 and C7)|
|Upper surface of the first rib|
|Ascending cervical artery (branch of Inferior thyroid artery)|
|Ventral rami of the third to eighth cervical spinal nerves|
|Actions||Elevate 1st rib, rotate the neck to the opposite side|
|Anatomical terms of muscle|
The Scalenus medius, also known as the middle scalene, is the largest and longest of the three scalene muscles in the human neck.
The middle scalene arises from the posterior tubercles of the transverse processes of the lower six cervical vertebræ. It descendes along the side of the vertebral column to insert by a broad attachment into the upper surface of the first rib, between the tubercle and the subclavian groove. The brachial plexus and the subclavian artery pass anterior to it. Because it elevates the upper ribs, the middle scalene muscle is also one of the accessory muscles of respiration.
Right first rib.
- Scalene muscles
- Scalenus anticus
- Scalenus posterior
- Accessory muscles of respiration
- Thoracic outlet syndrome
- Brachial plexus
- Subclavian artery
|Wikimedia Commons has media related to Scalenus medius muscles.|
- Origin, insertion and nerve supply of the muscle at Loyola University Chicago Stritch School of Medicine - scalenus medius
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