What is the primary function of the oblique arytenoid muscle?

The primary function of the oblique arytenoid muscle is to adduct the arytenoids. This muscle plays a crucial role in the closure of the vocal folds during phonation. When the oblique arytenoid muscle contracts, it brings the two arytenoid cartilages closer together, which tightens the vocal folds and allows for more effective sound production. This action is essential for creating sound during speaking and singing, as it helps to regulate airflow through the larynx.

The adduction of the arytenoids also aids in the protective mechanism of the airway, as it helps to close the laryngeal inlet during swallowing, thereby preventing food and liquids from entering the trachea. Understanding the function of this muscle is important for comprehending how the larynx operates in speech and breathing processes.