Muscle
Omohyoid
Infrahyoid strap muscle
High-yield
Ansa cervicalis (C1–C3); its intermediate tendon divides the posterior triangle into occipital and supraclavicular parts.
Overview
A two-bellied infrahyoid strap muscle tethered by an intermediate tendon that depresses the hyoid; it subdivides the posterior triangle of the neck.
Reference facts
- Origin
Superior border of the scapula (inferior belly)
- Insertion
Body of the hyoid bone (superior belly)
- Action
Depresses and steadies the hyoid bone
- Innervation
Ansa cervicalis (C1, C2, C3)
- Blood supply
Superior thyroid / lingual arteries