The Musculus arytaenoideus transversus is one of the muscles of the laryngeal musculature. It is assigned to the internal laryngeal muscles. With its help, the glottis narrows and allows the voice formation.

What is the musculus arytaenoideus transversus?

At the transition from the back of the throat to the neck is the larynx. This is instrumental in voice formation. Its activity is controlled by internal and external laryngeal muscles. The Musculus arytaenoideus transversus belongs to the inner laryngeal musculature. Together with the musculus arytaenoideus obliquus he is responsible for the closure of the glottis.

The larynx consists of a structure of several cartilagins that are arranged vertically one above the other. In the lower region of the larynx is the glottis. It is called Rima glottidis. The glottis is slit-shaped and located between the vocal folds. In the glottis there is the Pars intercartilaginea. These are two paired processes that belong to the artery cartilage.

When the musculus arytaenoideus transversus contracts, it closes the glottis. This happens because the two processes are contracted by the muscle activity. Thus, the vocal folds approach and allow the phonation.

Anatomy & Construction

The larynx is the medical term for the larynx. Its components are various cartilage, muscles and some fibers. The mobility of the larynx is ensured by various internal and external laryngeal muscles. The larynx can be divided into three regions.

These include the supraglottis or vestibulum laryngis in the upper area, followed by the glottis or cavitas laryngis intermedia and finally the subglottis or cavitas infraglottica. The larynx has a vertical shape down the neck. It is created by the cartilage framework, which is located around the larynx. Within this cartilaginous framework, there are various cartilages. They are formed by the Cartilago cricoida, the Cartilago thyroidea, the Cartilago epiglottica and the Cartilagines arytaenideae. The Cartilagines arytaenideae is also referred to as arytenoid cartilage or arytenoid cartilage.

The latter has the processus muscularis of the arytenoid cartilage. The course of the musculus arytaenoideus transversus begins at the processus muscularis of the arytenoid cartilage. From there it pulls on the opposite side of the arytenoid cartilage and ends at the apex of Stellknorpes. The supply of the musculus arytaenoideus transversus occurs via two nerves. These include the inferior laryngeal nerve and the recurrent laryngeal nerve. Both Neven fibers are branches of the X. cranial nerve. This is the vagus nerve. The vagus nerve is responsible for the care of some areas of the head and neck region as well as the chest area.

Function & Tasks

The larynx is surrounded by a cartilaginous framework in four layers. Each of these layers is entrusted with different tasks. The lower layer of the arytenoid cartilage is responsible for vocal development. This process is called phonation. In order for the human to produce a sound, he must learn how to control and regulate the larynx. This takes place via the control of the musculus arytenoideus transversus.

During tone formation, areas of the arytenoid cartilage are contracted. This is done by the fibers of the musculus arytenoideus transversus. The fibers of the muscle run transversely and contract. During this process, the surrounding cartilage gets closer. This has the consequence that the vocal cords come closer. The approach of the vocal folds makes it possible to produce sounds. The phonation can take place with it. Here, willingly and deliberately regulated tones are generated. The voice formation takes place.

This man can speak, but also produce singing sounds. The phonotation as a whole, however, requires a few more coordinated processes. They include the right hearing and a continuous flow of air. This flows through the lungs, the bronchi and trachea, the trachea. The mouth, nose and throat must be free. This area is called the neck tube, because it produces the vocal sound and the voice color. In addition to the components mentioned, it also requires the vocal folds and glottis. Everything interacts with each other and generates the speech sounds.

Diseases

A functional failure of the musculus arytaenoideus transversus leads to hoarseness. In addition, all diseases associated with hoarseness, voice complaints result. Hoarseness is called a dysponie.

It causes the vocal cords can no longer swing freely. This leads to a rough, busy or scratchy voice color. The diseases that cause hoarseness include bronchitis, infections or allergies. In addition, it can cause a laryngitis. This is either chronic or acute and is associated with irritating cough or hoarseness. Similar symptoms have an inflammation of the trachea. Here, too, hoarseness, coughing and moreover, a constriction of the respiratory tract. A laryngeal carcinoma, the development of an edema or a cyst have effects on the vocal cords and the phonation.

Tobacco smoking and the inhalation of toxic gases settle on the vocal cords and interfere with their activity. If other diseases make it necessary for a patient to be intubated for an extended period of time, laryngeal trauma can occur. This trauma affects the function of the entire larynx. Trauma can also be triggered in emergency situations when intubation must be performed under difficult conditions. In moments of a rescue situation, parts of the cartilage or the glottis may be damaged.

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