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 have come together into adducted (voicing) position, the posterior commissure is essentially just the point of contact between the posterior ends of the cords.
What is anterior commissure in 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).
Where is anterior commissure of larynx?
The anterior commissure of the larynx is the anterior junction point of the true vocal cords. It is bounded anteriorly by the thyroid cartilage and is part of the laryngeal glottis.
What is an anterior commissure scope?
Holinger anterior commissure laryngoscope incorporates the principle of the Yankauer post-nasal speculum. Specialized design helps increase the lumen and gives a larger field for work by elevating the tuberculum of the epiglottis.
Is anterior commissure part of corpus callosum?
The corpus callosum is the largest of the side-to-side interconnections between the two hemispheres and, in general, connects analogous areas in the two hemispheres. The anterior and posterior commissures are other small bundles of interhemispheric fibers, located anteriorly and posteriorly to the corpus callosum.
What is the function of the anterior commissure?
The anterior commissure (also labeled ac) is a large bundle of crossing fibers, which connects the olfactory bulb and parts of the cerebrum to the same areas on the opposite side.
What is the difference between anterior and posterior synechiae?
Anterior synechiae are at the angle of the eye where the peripheral iris impedes aqueous drainage and can lead to angle closure glaucoma. Posterior synechiae are at the pupil margin where the iris is adherent to the anterior lens capsule, which prevents dilation and makes cataract surgery more challenging.
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.
How do posterior synechiae affect Iris?
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.
What are peripheral anterior synechiae on gonioscopic examination?
Peripheral anterior synechiae are visualized on gonioscopic examination. Peripheral iris attachments noted anteriorly in the angle, which may extend anywhere from ciliary body to Schwalbe’s line and corneal endothelium are important to differentiate from normally occurring iris processes.