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
Frequently asked questions
What does the omohyoid do?
The omohyoid depresses and steadies the hyoid bone.
What nerve innervates the omohyoid?
The omohyoid is innervated by the ansa cervicalis (C1, C2, C3).
Where does the omohyoid attach?
The omohyoid originates from the superior border of the scapula (inferior belly) and inserts on the body of the hyoid bone (superior belly).
What is the blood supply of the omohyoid?
The omohyoid is supplied by the superior thyroid / lingual arteries.