Scalenus medius muscle
| Scalenus medius muscle |
|---|
|
| Deep neck muscles of humans (Scalenus medius muscle only shown on the right) |
| origin |
| Proc. transversus of the 3rd-7th centuries Cervical vertebra |
| approach |
| 1st rib |
| function |
| Pulling the neck down and sideways |
| Innervation |
| Rami ventrales of the spinal nerves of the neck |
| Spinal segments |
| C3-C5 |
The musculus scalenus medius ( Latin for “middle rib support muscle ”; from Latin scalenus “crooked”, “unequal-sided”) is a skeletal muscle that pulls from the cervical vertebrae to the first rib . In humans it is the longest of the three scalene muscles . The scalenus medius muscle pulls the neck to the side when it contracts on one side; when the muscles on both sides contract, the neck is pulled downwards.
The blood supply is via the artery cervical ascending , vertebral artery , deep cervical artery and artery transversa colli .
The brachial plexus and, in humans, the subclavian artery, enter the axilla between the medius scalenus medius and the anterior scalenus muscle ("posterior scalenus gap") .
See also
Individual evidence
- ^ Bernhard Tillmann : Atlas of the anatomy . 2nd Edition. Springer-Verlag, 2010, ISBN 978-3-642-02680-5 , p. 567.