Scalenus medius muscle

Dr Vijay et al.

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

Summary

  • 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

Relations

Head and neck anatomy
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Article Information

rID: 12652
System: Head & Neck
Section: Anatomy
Tags: stub, refs, cases
Synonyms or Alternate Spellings:
  • Scalenus medius
  • Middle scalene muscle
  • Middle scalene

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    Figure 1: nerve to scalenes and levator scapulae
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    Figure 2: cervical plexus labelled
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