Subclavius posticus muscle
Subclavius posticus muscle is an accessory muscle in the root of the neck, lying between the subclavius muscle and the inferior belly of omohyoid. It has an incidence of ~ 7.5% .
Summary
- origin: first costal cartilage
- insertion: superior margin of scapula
- nerve supply: nerve to subclavius or suprascapular nerve
Relations
- inferiorly: subclavian vessels, brachial plexus
Differential diagnosis
- duplicated inferior belly of omohyoid muscle
Related pathology
Subclavius posticus may be associated with:
