THRC.19

Question 1

Components of the internal ear

Answer 1

Membranous labyrinth

Interconnected series of membranous fluid-filled ducts

Question 2

Fluid inside the membranous labyrinth

Answer 2

Endolymph

Question 3

The components of the membranous labyrinth

Answer 3

• Vestibular labyrinth (balance)
• Cochlear labyrinth (hearing)

Question 4

Vestibular and cochlear labyrinth communicate through…

Answer 4

Ducts reuniens

Question 5

The membranous labyrinth is surrounded by…

Answer 5

Osseous labyrinth

Question 6

Components of the bony labyrinth

Answer 6

• Vestibule
• Semicircular canals
• Cochlea

Question 7

Answer 7

Osseus labyrinth (dog)

Question 8

Answer 8

Cochlea

Question 9

Answer 9

Vestibule

Question 10

Answer 10

Osseous ampulla

Question 11

Answer 11

Anterior semicircular duct

Question 12

Answer 12

Lateral semicircular duct

Question 13

Answer 13

Common crus

Question 14

Answer 14

Posterior semicircular duct

Question 15

The cochlea forms a spiral shape around…

Answer 15

Modiolus (hollow core of bone)

• This contains the cochlear nerve

Question 16

What is shown?

Answer 16

Cross section of a cochlea

Question 17

Answer 17

Helicotrema

Question 18

Answer 18

Spiral lamina (shelf structure)

Question 19

Answer 19

Modiolus

Containing the cochlear nerve

Question 20

The spiral lamina incompletely splits the lumen into which two portions?

Answer 20

• Scala tympani
• Scala vestibuli

Question 21

What is found in the spiral lamina?

Answer 21

The spiral ganglion of the cochlear nerve

Question 22

Components of the vestibular labyrinth

Answer 22

• Saccule
• Utricle
• Semicircular ducts

Question 23

The semicircular ducts arise from the…

Answer 23

Utricule

Question 24

The semicircular ducts are concerned with…

Answer 24

Balance

Question 25

Answer 25

Vestibulocochlear nerve

Question 26

Answer 26

Vestibular ganglion

Question 27

Answer 27

Vestibular nerve

Question 28

Answer 28

Cochlear nerve

Question 29

Answer 29

Sacculus

Question 30

Answer 30

Scala tympani

Question 31

Answer 31

Cochlear duct

Question 32

Answer 32

Scala vestibuli

Question 33

Answer 33

Helicotrema

Question 34

2

Answer 34

Cochlear foramen | (with secundary tympanic membrane)

Question 35

3

Answer 35

Ductus reuniens

Question 36

4

Answer 36

Utriculosaccular duct

Question 37

Which semicircular ducts fuse to form the common crus

Answer 37

* Anterior duct * Posterior duct

Question 38

What is found in the cochlear labyrinth?

Answer 38

The organ of corti

Question 39

What is shown?

Answer 39

Vestibular + auditory pathway

Question 40

Answer 40

Vestibulocochlear nerve (CN-VIII)

Question 41

Answer 41

Vestibulocochlear nuclei

Question 42

Answer 42

Caudal colliculus

Question 43

Answer 43

Rostral colliculus

Question 44

Answer 44

Acoustic area

Question 45

Answer 45

Medial geniculate nucleus

Question 46

Answer 46

Lateral lemniscus nucleus

Question 55

Location of _primary_ neurones concerned with the vestibular + auditory pathways

Answer 55

* Spiral ganglion * Vestibular ganglion * Cochlea

Question 56

The vestibulocochlear nerve enters the...

Answer 56

Trapezoid body