Arythenoid Cartilage in a Lateral Cross Section of the Larynx

Description

Positioned on the superior border of the cricoid lamina, the arytenoid cartilage appears as a paired, pyramidal blue structure in lateral cross section, capped by laryngeal mucosa and framed anteriorly by the inner surface of the thyroid cartilage. Its vocal process projects anteriorly toward the thyroid angle, aligning with the free edge of the true vocal fold, while the muscular process extends laterally as the insertion site for the posterior and lateral cricoarytenoid muscles. Superior to the glottic level, the leaf-like epiglottis rises behind the tongue base, and inferiorly the cricoid ring continues toward the trachea. This is the mechanical center of the posterior glottis. Small shape, large consequence. Rotation and gliding at the cricoarytenoid joint determine vocal fold adduction and abduction, so a clear lateral relationship between arytenoid, cricoid, and thyroid cartilages helps explain breathy dysphonia, inspiratory stridor, and posterior glottic insufficiency. Clinically, unilateral recurrent laryngeal nerve palsy leaves the ipsilateral arytenoid unable to adduct, and this cross-sectional anatomy clarifies why medialization laryngoplasty and arytenoid adduction target the vocal process and its soft tissue attachments rather than the vocal fold edge alone. The aryepiglottic fold and adjacent intrinsic muscles also orient the reader to sites of laryngeal edema and tumor spread at the supraglottis versus the glottis. Use this plate in head and neck anatomy teaching, speech-language pathology curricula, and otolaryngology references explaining the biomechanics of phonation, airway protection during swallowing, and endoscopic landmarks during microlaryngoscopy. It also fits operative atlases and patient-education materials covering vocal fold paralysis, posterior glottic stenosis, and framework surgery. Anatomical accuracy verified by SciePro's Medical Advisory Board.