Lecture 18 - Hearing 1

Question 1

Postnatal hearing screening?

Answer 1

newborn hearing screening programme - detect problem before short important developmental period

Question 2

Causes of adult hearing loss?

Answer 2

age, noise exposure, genetic, trauma, tumours, drugs

Question 3

Individual impact of hearing impairment?

Answer 3

poor speech language and cognition, decreased literacy, learning and education/employment, social isolation, depression, tinnitus

Question 4

Outer ear function?

Answer 4

collects sound, protects middle ear, sound localisation

Question 5

Wax produced by?

Answer 5

cerumen glands

Question 6

Middle ear?

Answer 6

separated from outer by tympanic membrane, drained by ciliated mucosa, Eustachian tube aerates and maintains equal air pressure across tympanic membrane

Question 7

Ossicular chain order?

Answer 7

MALLEUS, INCUS AND STAPES

Question 8

Middle ear function?

Answer 8

impedance transformer, progressive increase in surface area creates a greater force at oval window than at tympanic, increasing volume by 30-50dB