Scalenus posterior muscle
| Scalenus posterior muscle |
|---|
|
| Human deep neck muscles (posterior scalenus muscle only shown on the right) |
| origin |
| Proc. transversus of the 5th-7th centuries Cervical vertebra |
| approach |
| Human: 2nd 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 posterior ( Latin for "posterior rib support muscle "; from Latin scalenus "oblique", "unequal- sided "), in animals as the musculus scalenus dorsali s (previously also known as the musculus scalenus supracostalis ), is a skeletal muscle that extends from the cervical vertebrae to pulls the ribs . In humans it ends at the second rib, in articulated ungulates at the 2nd to 4th rib, and in predators an additional portion goes to the 8th and 9th rib. In horses the muscle is not developed.
It is the deepest and in humans the smallest of the three scalene muscles . The scalenus posterior muscle pulls the neck to one side when it contracts on one side; when the muscles on both sides contract, the neck is pulled downwards. He also lifts the ribs slightly and thus acts as an auxiliary inspirer .
The blood supply takes place via the arteria transversa colli , arteria cervicalis profunda and arteria intercostalis suprema .
Individual evidence
- ^ Bernhard Tillmann : Atlas of the anatomy . 2nd Edition. Springer-Verlag, 2010, ISBN 978-3-642-02680-5 , p. 567.