Ear

Front 1

Tegmental wall

Back 1

Forms the roof of the middle ear and separates the middle ear from the middle cranial fossa

Front 2

Jugular Wall

Back 2

Separates middle ear from the internal jugular (bottom wall of the middle ear)

Front 3

Membranous (lateral) wall

Back 3

Consists entirely of the tympanic membrane

Front 4

Anterior wall separates from

Back 4

Internal carotid artery in carotid canal

Front 5

Anterior wall contains

Back 5

1) tensor tympani muscle (opening)
2) pharyngotympanic tube (entrance)
3) chorda tympani (exit)
4) lesser petrosal nerve (exit)

Front 6

Labyrinthine (medial) wall contains

Back 6

separates middle and inner ear

1) promontory
2) oval window to foot of stapes
3) Round window
4) Prominence of facial canal
5) prominence of lateral semicircular circle

Front 7

mastoid (posterior) wall

Back 7

Lower bony wall between middle ear and mastoid air cells

1) Pyramidal eminence
2) Opening for chorda tympanic entering ear

Front 8

Movement of sound goes from

Back 8

Ossicles > oval window > perilymp >scala vestibuli > scala tympani > round window > spiral organ

Front 9

Tensor tympani inervated by which nerve?

Back 9

Supplied by nerve to the pterygoid (branch of V3)

Front 10

Stapedius innervated by

Back 10

Facial Nerve (VII)

Front 11

T/F recurrent otitis media can result from blockage of the pharyngotympanic tube

Back 11

True

Front 12

Semicircular ducts detect

Back 12

Direction of movement

Front 13

Utricle detects

Back 13

Centrifugal
Vertical

Acceleration

Front 14

Saccule detects

Back 14

linear acceleration