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Embryology and Anatomy of Ear

Question
21 out of 70
 

Which of the following is false about tympanic mem- brane?



A Cone of light is anteroinferior

B Shrapnell's membrane is also known as pars flaccida

C Healed perforation has three layers

D Anterior malleolar fold is longer than posterior

Ans. C Healed perforation has three layers Ref. Dhingra 6th/ed p 2,3

Let's see Each option one by one

Option a - Cone of light is anteroinferior

This is correct - ':4 bright cone of light can be seen radiating from the tip of malleus to the periphery in the antero-inierior quadrant"

Option b - Shrapnell's membrane is also called as pars flaccida. This is absolutely correct

Option c - Healed perforation has 3 layers

This is incorrect

When perforation of tympanic membrane heals, it heals in two layers and not in three layers.

"Healed chronic otitis media is the condition when tympanic membrane has healed (usually by two layers) is atrophic and easily retracted if there is negative pressure in the middle ear" -

Option d - Anterior malleal fold is longer than posterior fold. Well! it is not given anywhere that anterior fold is longer than posterior, but we have to eliminate one option and that definitely is option 'c'.

Embryology and Anatomy of Ear Flashcard List

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