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The cricothyroid muscle is the only tensor muscle of the larynx aiding with phonation. It is innervated by the superior laryngeal nerve. It is innervated by the superior laryngeal nerve. Its action tilts the thyroid forward to help tense the vocal cords , thus increasing the pitch of the voice.
cricothyroid muscle ≅ cricothyroid muscle (Q261411) cricothyroid muscle inferior cornu of thyroid cartilage ≅ inferior horn of thyroid cartilage (Q16976981) inferior cornu of thyroid cartilage cricothyroid joint cricothyroid joint oblique line ≅ oblique line of thyroid cartilage (Q7075176) oblique line
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 .
The cricothyroid ligament is composed of two parts: the median cricothyroid ligament along the midline (a thickening of the cricothyroid membrane). It is a flat band of white connective tissue that connects the front parts of the contiguous margins of the cricoid and thyroid cartilages. It is a thick and strong ligament, narrow above and broad ...
Two muscles originate along the line, the thyrohyoid muscle and inferior pharyngeal constrictor. The sternothyroid inserts along the line. Thyroid cartilage. Movement of the cartilage at this joint produces a change in tension at the vocal folds, which in turn produces variation in voice.
The function of the cricoid cartilage is to provide attachments for the cricothyroid muscle, posterior cricoarytenoid muscle and lateral cricoarytenoid muscle muscles, cartilages, and ligaments involved in opening and closing the airway and in speech production. [citation needed]
A superior laryngeal nerve palsy changes the pitch of the voice and causes an inability to make explosive sounds due to paralysis of the cricothyroid muscle. If no recovery is evident three months after the palsy initially presents, the damage is most likely to be permanent. A bilateral palsy presents as a tiring and hoarse voice.
In this, the muscle is an antagonist of the lateral cricoarytenoid muscle. [1] The muscle additionally draws the arytenoid cartilages posterior-ward, thus (assisting in) lengthening the vocal cords (here acting as synergist of the cricothyroid muscle). The lateral-most portion of the muscle also draws the arytenoid cartilages lateral-ward ...