Scalane medius muscle
Scalane medius Muscle Anatomy
The middle scalene arises from the posterior tubercles of the transverse processes of the lower six cervical vertebrae.
Origin
C2-C6 .
Insertion
first rib.
Nerve supply
ventral rami of the third to eighth cervical spinal nerves.
Action
Elevate 1st rib, and rotate the neck to the opposite side.