9/12/2023 0 Comments Nasopharynx auditory tubeMedial part is supplied by pharyngeal branch of pterygopalatine ganglion .Lateral part of the tube is supplied by glossopharyngeal nerve via tympanic plexus.Describe the Nerve Supply of Auditory Tube. 88 Mucous glands and lymphatic nodules are found deep to the epithelial layer. The guttural pouch is lined with a thin mucous membrane composed of pseudostratified, ciliated epithelium interspersed with goblet cells. Tensor tympani, levator palatini help in opening the auditory tube. Each pouch has a volume of 300500 mL and communicates with the nasopharynx through the pharyngeal opening of the auditory tube. Muscles attached to the cartilaginous part of auditory tube are tensor tympani, levator palatini, tensor palatini and salpingopharyngeus. Bony part – forms posterior 1/3 rd, it lies in petrous part of temporal part and extends from the tympanic cavity to the sulcus tubae.It opens into the lateral wall of naopharynx by passing through the gap between the base of skull and superior constrictor of pharynx. The Eustachian tube is also known as the pharyngotympanic tube or the auditory tube. it lies in sulcus tubae ( formed by articulation of petrous part of temporal bone with greater wing or sphenoid). The Eustachian tube is named after the Italian anatomist, Bartolomeo Eustachi, who observed that it was a canal that connected the nasopharynx to the middle ear. So, in the absence of a pressure gradient, no passive tubal opening took place, and no air or fluid flow was detected through the transtympanic tube. Cartilaginous part– it forms anterior 2/3 rd. The progression of mucociliary clearance within the eustachian tube flows from the proximal middle ear cavity to the. In the model, submersion increases pressure in the nasopharynx which offsets the pressure in the external auditory canal.It balances the air pressure in the middle ear with the atmospheric pressure, thus allowing free movement of tympanic membrane.Is directed downwards, forwards and medially.Where is Auditory Tube Located and Whats is its Function?Īuditory tube /pharyngotympanic/Eustachian tube is a trumpet-shaped tube which connects middle ear with nasopharynx. 3 Describe the Nerve Supply of Auditory Tube.It is made up of a shorter bony part, 12 millimeters long. 1 Where is Auditory Tube Located and Whats is its Function? The auditory tube is a closed organic tube which connects the rhinopharynx and the middle ear.
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