What is posterior commissure of larynx?
The flat, front-facing surface of the glottic aperture that lies between the vocal cord posterior ends. When the vocal cords are in abducted (breathing) position, the posterior commissure is at its widest, since the cords’ posterior ends are spread furthest apart from each other.
What is the anterior commissure of larynx?
Background: The anterior commissure (AC) of the human larynx is usually understood as an area of the glottis anteriorly situated between the two vocal folds inserting to the thyroid cartilage (TC).
What is indirect laryngoscopy?
Indirect laryngoscopy uses a small mirror held at the back of your throat. The health care provider shines a light on the mirror to view the throat area. This is a simple procedure. Most of the time, it can be done in the provider’s office while you are awake. A medicine to numb the back of your throat may be used.
What is glottic insufficiency?
Glottic insufficiency is characterized by incomplete closure of the vocal folds when phonating, which causes inappropriate leakage of air through the glottis on attempting to phonate and there is an increased risk of aspiration.
What is anterior to the glottic opening?
A view by direct laryngoscopy of the glottic opening, which reveals the true vocal cords. The arytenoids (paired cuneiform and corniculate cartilages) are inferior and anterior to the position of the cords.
What is an anterior commissure scope?
In this paraglossal or retromolar technique, the anterior commissure laryngoscope is passed from the right corner of the mouth, displacing the tongue to the left and advanced towards the larynx between the tongue and the tonsil.
What are synechiae anteriorly?
Synechiae are adhesions that may occur anteriorly in which the iris becomes adherent to the trabecular meshwork in the iridocorneal angle (peripheral anterior synechiae, PAS) or occur posteriorly in which the iris adheres to the anterior lens capsule (posterior synechiae).
What are the complications of posterior synechiae?
Complications. Posterior synechiae, if substantial, may affect the movement of aqueous from the posterior to the anterior chamber, a condition known as iris bombe. As pressure builds up posteriorly, the iris may bow forward, resulting in secondary angle closure. Seclusio pupillae occurs when the synechiae extend 360 degrees around pupillary border.
Is peripheral anterior synechia an angle-closure glaucoma?
Keywords: Angle-closure glaucoma, Ciliary body, Peripheral anterior synechia, Trabecular-ciliary process distance, Ultrasound biomicroscopy Peripheral anterior synechia (PAS) is a condition in which the iris adheres to the angle, and it is one of the pathognomonic signs of primary angle-closure glaucoma (PACG).
What is the posterior commissure?
The posterior commissure (PC) is a transversely-oriented commissural white matter tract that connects the two cerebral hemispheres along the midline. It is a very important anatomical landmark which is thought to play a role in the visual system,…