Quadrangular membrane
Encyclopedia
The quadrangular membrane is a layer of submucosa. It contains the cuneiform cartilages
. The membrane runs between the lateral aspects of the epiglottis
and arytenoid cartilages on each side. The free inferior border of the quadrangular membrane is the vestibular ligament
which is the vestibular fold
when covered by mucosa. The superior border is in the aryepiglottic fold
.
Cuneiform cartilages
The cuneiform cartilages of the larynx are two small, elongated pieces of yellow elastic cartilage, placed one on either side, in the aryepiglottic fold, where they give rise to small whitish elevations on the surface of the mucous membrane, just in front of the arytenoid cartilages....
. The membrane runs between the lateral aspects of the epiglottis
Epiglottis
The epiglottis is a flap that is made of elastic cartilage tissue covered with a mucous membrane, attached to the entrance of the larynx. It projects obliquely upwards behind the tongue and the hyoid bone, pointing dorsally. The term, like tonsils, is often incorrectly used to refer to the uvula...
and arytenoid cartilages on each side. The free inferior border of the quadrangular membrane is the vestibular ligament
Vestibular ligament
The ventricular Folds are two thick folds of mucous membrane, each enclosing a narrow band of fibrous tissue, the Vestibular ligament which is attached in front to the angle of the thyroid cartilage immediately below the attachment of the epiglottis, and behind to the antero-lateral surface of the...
which is the vestibular fold
Vestibular fold
The vestibular fold is one of two thick folds of mucous membrane, each enclosing a narrow band of fibrous tissue, the ventricular ligament, which is attached in front to the angle of the thyroid cartilage immediately below the attachment of the epiglottis, and behind to the antero-lateral surface...
when covered by mucosa. The superior border is in the aryepiglottic fold
Aryepiglottic fold
The entrance of the larynx is a triangular opening, narrow in front, wide behind, and sloping obliquely downward and backward. It is bound, in front, by the epiglottis; behind, by the apices of the arytenoid cartilages, the corniculate cartilages, and the interarytenoid notch; and on either side,...
.