Scalenus medius muscle

The scalenus medius (middle scalene) muscle is one of the three scalene muscles in the neck.


  • origin: transverse processes of lower six cervical vertebrae (C2-C7)
  • insertion: upper surface of first rib
  • action (similar to scalenus anterior muscle)
    • raises first rib (respiratory inspiration)
    • acting bilaterally: neck flexion
    • acting unilaterally: lateral neck flexion and rotation
  • nerve supply: ventral rami of cervical nerves C3-C8 from the cervical plexus

Gross anatomy

Anatomy: Head and neck

Anatomy: Head and neck

Article information

rID: 12652
Section: Anatomy
Synonyms or Alternate Spellings:
  • Scalenus medius
  • Middle scalene muscle
  • Middle scalene

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure 1: nerve to scalenes and levator scapulae
    Drag here to reorder.
  • Figure 2: cervical plexus labeled
    Drag here to reorder.
  • Figure 3: deep neck muscles (Gray's illustration)
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.