Intrinsic Muscles of the Larynx, Superior View

Description

Viewed from superior to inferior, the laryngeal inlet sits anterior to the arytenoid cartilages and posterior to the epiglottis, with the paired vocal folds forming the medial margins of the rima glottidis. Along the superior surface of the vocal folds, the vocalis portion of thyroarytenoid tracks anteromedially from the thyroid cartilage toward the vocal processes of the arytenoids, while the cricoarytenoid joints lie posterolateral at the arytenoid bases on the cricoid lamina. Posteriorly, the transverse and oblique arytenoid muscles span between the arytenoid cartilages, and the posterior cricoarytenoid arises from the posterior cricoid and inserts onto the muscular process of each arytenoid. Small anatomy, big consequences. For teaching phonation mechanics, a top down view clarifies which intrinsic muscles act as tensors and which abduct or adduct the vocal folds: cricothyroid increases longitudinal tension via the thyroid and cricoid, lateral cricoarytenoid and interarytenoids close the rima glottidis, and posterior cricoarytenoid provides the only active abduction. That relationship matters in recurrent laryngeal nerve palsy, where loss of all intrinsic muscles except cricothyroid leaves the affected vocal fold near a paramedian position, producing hoarseness and possible airway compromise if bilateral. This orientation also mirrors the operative mental map used during suspension laryngoscopy when assessing glottic closure patterns. Otolaryngology texts, voice science modules, and gross anatomy or head and neck dissection labs can use this rendering to pair muscle vectors with expected changes in pitch, breathiness, and airway caliber, and to annotate injection laryngoplasty or medialization thyroplasty concepts without switching to an external neck view. Speech language pathology programs will also find it well suited for explaining how targeted muscle imbalance alters vocal fold edge and vibratory symmetry. Anatomical accuracy verified by SciePro's Medical Advisory Board.