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The cricoid lamina is the roughly quadrilateral broader and flatter posterior portion of the cricoid cartilage. It measures 2-3 cm superoposteriorly. [1] The cricoid lamina exhibits a midline vertical ridge posteriorly; the ridge creates posterior concavities to either side. [1]
The cricothyroid ligament is named after the two structures it connects: the cricoid cartilage and the thyroid cartilage. It is also known as the cricothyroid membrane, and the cricovocal membrane. [3] The various parts of the cricothyroid ligament have been named in many different ways, which can cause confusion.
The cricothyroid joint (or articulation) is a joint connecting the cricoid cartilage and the thyroid cartilage.It plays a key role in adjusting human voice pitch by changing the tension of the vocal cords.
Lateral part of the arch of the cricoid: Insertion: Muscular process of the arytenoid cartilage: Nerve: Recurrent laryngeal branch of the vagus: Actions: Adduct and medially rotate the cartilage, pulling the vocal ligaments towards the midline and backwards and so closing off the rima glottidis: Antagonist: Posterior cricoarytenoid muscle ...
[3] [5] They draw up the arch of the cricoid cartilage and tilt back the upper border of the cricoid cartilage lamina. [3] [5] The distance between the vocal processes and the angle of the thyroid is increased, elongating [3] and thus tensing the vocal folds, [1] thereby resulting in higher pitch phonation. [3]
Posterior part of the cricoid: Insertion: Posterior surface of muscular process of the arytenoid cartilage: Nerve: Recurrent laryngeal nerve branch of the vagus nerve (CN X) Actions: Abducts and laterally rotates arytenoid cartilage, pulling vocal ligaments away from the midline and forward and so opening rima glottidis: Antagonist: Lateral ...
The procedure was first described in 1805 by Félix Vicq-d'Azyr, a French surgeon and anatomist. [3] A cricothyrotomy is generally performed by making a vertical incision on the skin of the throat just below the laryngeal prominence (Adam's apple), then making a horizontal incision in the cricothyroid membrane which lies deep to this point.
The thyroid cartilage forms the bulk of the front wall of the larynx. It protects the vocal folds ("vocal cords"), which are located directly behind it. When the angle of the thyroid cartilage changes relative to the cricoid cartilage, this changes the pitch of voice. The cartilage also serves as an attachment for several muscles.