Anatomy Of Middle Ear

Question 1

Walls off middle ear
Anterior wall separated :-
Posterior wall separates :-
Roof separates :-

Medial wall of middle ear ( image)

1. Lateral SCC
2. Horizonatal / tympanic segment of facial nerve
3. Ova Window+ foot plate of stapes
4. Round window
5. Promontory
6. Process cochleari formis
7. Genu
8. Geniculate ganglion

Promontory :- bulge produce by :-
Senses :-
Read remaining :-

Processes cochleariformis :- 
It is projection 
Muscle :- 
Act as a landmark for :- 
Ganglion present :- 

Posterior wall of middle ear :- image

1. Aditus
2. Fossa incidis
3. Facial recess / suprapyramidal recess
4. Enters of chords tympani
5. Vertical /descending / mastoid segment of facial nerve :-
6. Pyramid :- stapedius
7. Sinus tympani / infra pyramidal recess

Facial recess / supra pyramidal recess
Medially :-
Laterally :-
superiorly :-

Placement of cochlear electrode :-

Sinus tympani / infra pyramidal recess :-
MC site or residual disease ( cholesteatoma )

Stapedial Reflex / Aucoustic reflex :-

Answer 1

27

Question 2

Stedial reflex :- 
Sound of 70-100db 
Bilateral reflex 
Afferent :- 
Efferent :- 
Nerve to stapedius is branch of :- 

8 th nerve complete palsy :-
7 th nerve complete palsy :-

Used for :- NOHL

Answer 2

30

Question 3

Pars flacida :-
Most mobile part of TM is :-
MC site of retraction pocket is :-

Narrowest part of middle ear :-
Widest part of middle ear :-

Anterior wall of middle ear :- image

1. Origin of tensor tympani
2. Canal of Huguier for chordates tympani supplies :-
3. Eustachian tube :- ( anteriorly inferior )

Anterior wall is also known as :-

Roof by tegmen tympani bone :-

Floor

1. Tympanic pleuxus
2. Jacobsons nerve enters middle ear through floor
3. Jugular bulb
4. 9,10,11 CN

Answer 3

32

Question 4

Middle ear cavity :- 
1. Scutum :- 
2. Prusack space :- 
Epitympanum aka attic 
Mesotympanum 
Hypotympanum 

MC site for 1* cholesteatoma :-
Scutum is :-
Prussack space :-

Answer 4

33