Laryngeal Paralysis

Anatomy
The larynx is a semi-rigid fibroelastic cylinder which joins the upper and lower respiratory tracts. Three major and two minor hyaline cartilages are embedded in
this fibroelastic membrane to maintain a patent airway and to provide support for
the moving parts. The larger cartilages comprise the flap-like epiglottis rostrally, the horseshoe-shaped thyroid cartilage in the middle and the ring-shaped cricoid cartilage, which attaches to the trachea, caudally. The cricoid and thyroid cartilages are joined by the firm cricothyroid articulation and provide the rigid chassis of the larynx. The paired arytenoid cartilages, which are joined dorsally in the midline by a sesamoidean band, protrude into the lumen of the larynx and the gap between their corniculate processes forms the dorsal part of the rima glottidis.

A vocal ligament arises from the most ventral part of each arytenoid (the vocal process) and these meet in the ventral midline. These form the core of the vocal folds and the ventral part of the rima glottidis. Similar, but smaller, vestibular folds lie parallel to and rostral to the vocal folds. The laryngeal ventricles consist of a ventricular depression lateral to the vocal fold and a ventricular saccule at its base. […]