Arytenoid (Muscle)

The arytenoid muscle primarily functions to adduct the arytenoid cartilages, which narrows the laryngeal inlet. This action is crucial for phonation and protecting the airway during swallowing.

The arytenoid muscle attaches from one arytenoid cartilage to the opposite arytenoid cartilage. This unique positioning allows for effective movement and coordination during vocalisation.

The arytenoid muscle is innervated by the inferior laryngeal nerve, which is a branch of the recurrent laryngeal nerve. This innervation is essential for its motor function in the larynx.

The blood supply to the arytenoid muscle comes from branches of both the superior and inferior thyroid arteries. These laryngeal branches ensure adequate perfusion for muscle function.

The arytenoid muscle contributes to laryngeal function by facilitating the adduction of the arytenoid cartilages, which is vital for controlling airflow and sound production during speech. Its role is critical in maintaining airway protection while swallowing.