- Cricothyroid muscle
Cricothyroid muscle Muscles of larynx. Side view. Right lamina of thyroid cartilage removed. The ligaments of the larynx. Antero-lateral view. Latin musculus cricothyroideus Gray's subject #236 1081 Origin Anterior and lateral cricoid cartilage Insertion Inferior cornu and lamina of the thyroid cartilage Artery Nerve external laryngeal branch of the vagus Actions tension and elongation of the vocal folds
The cricothyroid muscle is the only tensor muscle of the larynx, aiding with phonation. It attaches to the anterolateral aspect of the cricoid and the inferior cornu and lower lamina of the thyroid cartilage, and its action tilts the thyroid forward to help tense the vocal cords. Not to be confused with the posterior cricoarytenoid muscles, which are the only muscles directly responsible for opening (abducting) the space between the vocal cords to allow for sound production.
The Cricothyroid muscle produces tension and elongation of the vocal folds by drawing up the arch of the cricoid cartilage and tilting back the upper border of the thyroid cartilage lamina; the distance between the vocal processes and the angle of the thyroid is thus increased, and the folds are consequently elongated, resulting in higher pitch phonation.
- Cricothyroid ligament
- vocal fold
- Thyroid cartilage
- Vocology - science and practice of voice habilitation
- Adam's apple
- National Center for Voice and Speech
- Cricothyroid approximation
List of muscles of head and neck: the neck (TA A04.2, GA 4.387) Cervical Suboccipital Suprahyoid Infrahyoid/strap Fasciae Pharynx Larynx
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