Eustachian tube opens in middle ear in-
Correct Answer: anterior wall
Description: 70. Ans: b. Anterior wall
(Refer: PL Dhingra, Diseases of Ear, Nose & Throat, 7th edition, pg no. 61)
Eustachian tube
Cylindrical channel connecting tympanic cavity & nasopharynx called Pharyngotympanic tube
Opens in the anterior wall of middle ear
Epithelium – Ciliated columnar epithelium
Length – 36 mm (Lateral 1/3 bony & Medial 2/3 fibrocartilaginous)
Position – Placed at angle of 45 ͦ with sagittal plane
Muscles of ET – Tensor palati supplied by branch of mandibular nerve & Levator palate supplied by pharyngeal plexus of 11th nerve
Neurovascular supply
Arterial supply
Venous drainage
Nerve supply
Ascending pharyngeal artery
Middle meningeal artery
Artery of pterygoid canal
Pterygoid venous plexus
Tympanic plexus
Category:
Unknown
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