Thyroepiglottic muscle

Thyroepiglottic muscle is a muscle that is part of the larynx in the human body. It is also known as the thyroarytenoid muscle. The muscle is involved in the process of phonation, which is the production of sound through the vocal cords.

Etymology

The term "thyroepiglottic" is derived from the Greek words "thyreos" (shield), "epi" (upon), and "glottis" (the part of the larynx consisting of the vocal cords and the opening between them). The muscle is so named because it is located near the thyroid cartilage and the epiglottis.

Anatomy

The thyroepiglottic muscle originates from the inner surface of the thyroid cartilage and inserts into the lateral border of the epiglottis. It is innervated by the recurrent laryngeal nerve, a branch of the vagus nerve.

Function

The primary function of the thyroepiglottic muscle is to widen the laryngeal inlet, which is the opening to the larynx. This allows air to pass through the larynx and into the trachea and lungs. The muscle also helps to control the tension of the vocal cords, which is important for the production of different pitches during speech.

Clinical significance

Dysfunction of the thyroepiglottic muscle can lead to voice disorders, such as dysphonia. This can occur as a result of nerve damage, muscle weakness, or other medical conditions. Treatment may involve speech therapy, medication, or surgery.

See also

• Larynx
• Phonation
• Vocal cords
• Thyroid cartilage
• Epiglottis

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