Anatomy
Origin:
Posterior surface of manubrium of sternum.
Insertion:
Oblique line on lamina of thyroid cartilage.
Key Relations:
-Is one of the infrahyoid muscles (sometimes referred to as ‘strap muscles’) lying in the muscular triangle of the neck.
-Is in continuity with thyrohyoid.
Functions
Draws the larynx (thyroid cartilage) downwards after it has been elevated by swallowing or vocal movements for example.
Supply
Nerve Supply:
Anterior rami of C1 to C3 through the ansa cervicalis.
Blood Supply:
Superior thyroid artery.
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