What is posterior commissure of larynx?
Posterior wall of the glottis. Posterior portion of glottis. Posterior portion of the glottis. Posterior laryngeal commissure. Posterior commissure of larynx.
What is the anterior and posterior commissure?
The anterior commissure connects the olfactory bulbs, amygdaloid nuclei, and the medial and inferior temporal lobes. The posterior commissure fibers connect areas in the occipital lobes, primarily areas concerned with pupillary response and eye movement control.
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, however its functions are still largely unknown.
What lies posterior to the larynx?
STRUCTURE: The pharynx is located posteriorly to the nasal and oral cavities and functions as a cavity through which food and air pass to the esophagus and larynx, respectively. The pharynx is made up of three separate regions: the nasopharynx, oropharynx, and laryngopharynx.
What is commissure meaning?
Definition of commissure 1 : a point or line of union or junction especially between two anatomical parts (such as adjacent heart valves) 2 : a connecting band of nerve tissue in the brain or spinal cord.
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 is the anterior commissure do?
The anterior commissure works with the posterior commissure to link the two cerebral hemispheres of the brain and also interconnects the amygdalae and temporal lobes, contributing to the role of memory, emotion, speech and hearing. It also is involved in olfaction, instinct, and sexual behavior.
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.
How do you find the posterior commissure?
The posterior commissure is labelled at center top. The posterior commissure (also known as the epithalamic commissure) is a rounded band of white fibers crossing the middle line on the dorsal aspect of the rostral end of the cerebral aqueduct. It is important in the bilateral pupillary light reflex.
What is an anterior larynx?
The larynx is located within the anterior aspect of the neck, anterior to the inferior portion of the pharynx and superior to the trachea. The hyoid bone, while technically not part of the larynx, provides muscular attachments from above that aid in laryngeal motion.
Is the esophagus anterior to the larynx?
The larynx is anterior to the esophagus.
What does anterior commissure mean?
Medical Definition of anterior commissure : a band of nerve fibers crossing from one side of the brain to the other just anterior to the third ventricle.
Which is the anterior commissure of the larynx?
anterior commissure of larynx. an·te·ri·or com·mis·sure of lar·ynx. (an-tēr’ē-ŏr kŏm’i-shŭr lar’ingks) The junction of the vocal cords anteriorly in the larynx.
What are the structures of the glottic larynx?
The glottic larynx includes the true vocal cords, anterior commissure, and posterior commissure. The anterior commissure, vocal ligament, thyroglottic ligament, and conus elasticus are the principal anatomic structures that surround the glottic larynx and act as barriers to the spread of malignancy.
Is the posterior commissure responsible for upward gaze?
On the basis of clinical observations, the nucleus of the posterior commissure (PCom) has long been suspected as being involved in the generation of upward eye movements, since lesions in patients resulted in upward gaze paralysis ( Christoff, 1974 ). To date the role of the PCom in vertical gaze has not been fully explained.
What causes a scar on the posterior commissure?
Scar (+), A – arytenoid complex, arrow – anterior. Midline posterior commissure mass cause by benign neurogenic tumour.