quadrangular (superior/inferior) membrane; Tourtual membrane

Introduction

A thin submucosal sheet of connective tissue that connects the border of the epiglottic cartilage to the arytenoid & corniculate cartilages.

Superior part:

• thickened inferiorly to form the vestibular ligament, which is covered loosely by the vestibular fold

Inferior part:

• the cricothyroid ligament (conus elasticus) begins inferiorly as the median cricothyroid ligament & ends as the vocal ligament

Between the vocal & vestibular ligaments the membrane lined with mucous membrane is evaginated to form the wall of the ventricle.

More general terms

• larynx