Anatomy/physiology of ear

Question 1

What type of epithelium does the external ear have?

Answer 1

Stratified keratinised squamous epithelium

Question 2

What causes cauliflower ear?

Answer 2

Pinna haematoma, collection of blood causes cartilaginous areas to becomes avascular leading to loss of cartilaginous structure, haematoma should be drained.

Question 3

Infection of outer ear canal

Answer 3

Otitis externa

Question 4

What is the medical term for ear drum

Answer 4

Tympanic membrane

Question 5

What are the three ossicles called?

Answer 5

Malleus, incus, stapes

Question 6

Which nerve is closely associated to the middle ear cavity and why is this knowledge important?

Answer 6

Facial nerve, care must be taken during surgery to this area or can cause facial nerve palsy

Question 7

What is the function of the ossicles

Answer 7

To transmit sound from the tympanic membrane to the inner ear, much more important role than tympanic membrane

Question 8

Infection of the middle ear

Answer 8

Otitis media

Question 9

middle ear infection with effusion due to blockage of the Eustachian tube

Answer 9

Glue ear “disease of childhood”

Question 10

Treatment given to treat glue ear/otitis media in children to help ventilate the middle ear

Answer 10

Grommet

Question 11

Keratinized squamous epithelium in middle ear(where it is meant to be respiratory epithelium), causes problems, grows and are destructive

Answer 11

Cholesteatoma(nothing to do with cholesterol)

Question 12

Converts sound pressure patterns from the outer ear into electrochemical impulses

Answer 12

Cochlea

Question 13

Responsible for some of the sensory input to aid in balance

Answer 13

Vestibular system