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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.
The external branch functions to stretch the vocal cords by activating the cricothyroid muscle, increasing pitch. The external laryngeal nerve gives branches to pharyngeal plexus and the superior portion of the inferior pharyngeal constrictor , and communicates with the superior cardiac nerve behind the common carotid artery .
The recurrent laryngeal nerves control all intrinsic muscles of the larynx except for the cricothyroid muscle. [ 15 ] [ a ] These muscles act to open, close, and adjust the tension of the vocal cords, and include the posterior cricoarytenoid muscles , the only muscle to open the vocal cords.
Vocal cord paresis, also known as recurrent laryngeal nerve paralysis or vocal fold paralysis, is an injury to one or both recurrent laryngeal nerves (RLNs), which control all intrinsic muscles of the larynx except for the cricothyroid muscle. The RLN is important for speaking, breathing and swallowing.
They cause muscle tension on the cricoid cartilage, leading to a globus feeling. Pharyngeal spasms, a more common source of a globus feeling, cause tension on the thyroid cartilage. They move up and down, left and right in the pharyngeal muscles. Both may be present. The patient complains about the signs and symptoms enumerated above.
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]
Other possible signs of hypothyroidism include: extreme fatigue, constipation, dry skin, cold sensitivity, menstrual irregularities, inability to focus and muscle aches, says Jaggi. Importantly ...
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 .