Which of the following is NOT one of the intrinsic muscles of the larynx?

The sternothyroid muscle is not classified as one of the intrinsic muscles of the larynx. Instead, it is one of the extrinsic muscles that assist in the movement and positioning of the larynx, primarily influencing its downward movement during swallowing and other actions. In contrast, the intrinsic muscles of the larynx, including the posterior cricoarytenoid, thyroarytenoid, and cricothyroid, are responsible for controlling the pitch and volume of the voice by adjusting the tension and position of the vocal cords. These intrinsic muscles work closely together to modulate airflow and sound production within the laryngeal structure, which is essential for phonation. Thus, understanding the function and classification of these muscles is vital for studying speech disorders and laryngeal function.