Espiral AtlasMembranes and ligaments of the larynx (conus elasticus and quadrangular membrane)
membrana fibroelastica laryngis
Study entry
Parts
The submucosal fibroelastic membrane of the larynx has two parts. The conus elasticus (cricovocal membrane), inferior, merges in front with the median cricothyroid ligament; its free, thickened upper border forms the vocal ligaments; the portions that run laterally between the vocal folds and the upper border of the cricoid are the lateral cricothyroid ligaments. With the mucosa, it closes the entrance of the trachea, except for the rima glottidis. The quadrangular membrane, superior, is a thin submucosal sheet between the lateral surfaces of the arytenoids and the epiglottis; its free lower border is the vestibular ligament, covered by mucosa in the vestibular fold, and the free upper border, the aryepiglottic ligament, covered by mucosa in the aryepiglottic fold.
Joints
They attach the laryngeal skeleton to the hyoid (thyrohyoid membrane) and to the trachea (cricotracheal ligament).
Source: cap. 9, «Esqueleto laríngeo»