Scalenus posterior muscle

Last revised by Dr Daniel J Bell on 22 Jul 2022

The scalenus posterior (posterior scalene) is one of the three scalene muscles in the neck.

Summary

  • origin: transverse processes of lower two or three cervical vertebrae (C5-C7)
  • insertion: outer surface of second rib
  • action:
    • raises second rib (respiratory inspiration)
    • acting together: neck flexion
    • acting on one side: lateral neck flexion and rotation
  • nerve supply: ventral rami of cervical nerves C6-C8 from the cervical plexus

Gross anatomy

Relations

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure 1: nerve to scalenes
    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.