Musculus cricoarytenoideus lateralis

Musculus cricoarytenoideus lateralis, also known as the lateral cricoarytenoid muscle, is an important muscle in the human larynx. It plays a crucial role in vocalization and phonation. In this article, we will explore the anatomy, function, and clinical significance of the Musculus cricoarytenoideus lateralis.

Anatomy

The Musculus cricoarytenoideus lateralis is one of the intrinsic muscles of the larynx. It is located on the lateral aspect of the cricoarytenoid joint, which is the joint between the cricoid cartilage and the arytenoid cartilage. The muscle originates from the anterolateral surface of the cricoid cartilage and inserts onto the muscular process of the arytenoid cartilage.

Function

The primary function of the Musculus cricoarytenoideus lateralis is to adduct the vocal folds. When the muscle contracts, it brings the arytenoid cartilages closer to the midline, resulting in the closure of the glottis. This closure is essential for the production of voiced sounds during speech and singing.

Clinical Significance

The Musculus cricoarytenoideus lateralis is innervated by the recurrent laryngeal nerve, a branch of the vagus nerve. Damage to this nerve can lead to paralysis or weakness of the muscle, resulting in vocal fold immobility or difficulty in vocalization. This condition is known as vocal fold paralysis and can significantly impact a person's ability to speak or sing.

See Also

• Musculus cricoarytenoideus posterior
• Musculus cricoarytenoideus
• Larynx