Cricothyroid
Tongue & Throat
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The only laryngeal muscle innervated by the superior (not recurrent) laryngeal nerve. Singers rely on this to hit high notes.
Function
Tenses and elongates vocal cords — raises pitch
Origin
Anterior arch of cricoid cartilage
Insertion
Inferior horn and lamina of thyroid cartilage
Innervation
External branch of superior laryngeal nerve (CN X)