CCE 5 Final

Question 1

Parts of the external ear

Answer 1

1. Auricle/Pinna - movable cartilage and skin
2. External Auditory canal - terminates at tympanic membrane / eardrum

Question 2

Outer 1/3rd External auditory canal

Answer 2

Cartilage

Question 3

Inner 2/3rds of the external auditory canal

Answer 3

Bone

Question 4

The external auditory canal is lined with glands that secrete _____ that lubricates and protects the ear

Answer 4

Cerumen

Question 5

What does cerumen do when chewing and talking

Answer 5

Migrates outward

Question 6

Parts and function of the Tympanic membrane

Answer 6

1. Separated external and middle ear
2. Transulcent, pearly gray
3. Cone of light in anterioinferior corner
4. Malleus - umbo and manubrium and short process seen
5. Pars tensa - the rest of the TM
6. Annulus - outer fibrous ring

Question 7

Middle ear - Function and parts

Answer 7

1. Air filled cavity in temporal bone
2. Malleus, in sum and stapes
3. Oval window - at end of stapes
4. Round window
5. Eustachian tube

Question 8

What is the Eustachian tube?

Answer 8

1. Connects middle ear with nasopharynx
2. Opens with swallowing and yawning
3. Allows equalization of pressure with altitude changes

Question 9

Parts of the inner ear

Answer 9

1. Vestibule
2. Semicircular canals
3. Cochlea

Question 10

What is tinnitus? (6)

Answer 10

1. Phantom sound
2. Ringing, crackling, buzzing
3. Louder with decreased environmental noise
4. Cerumen, OM
5. Ototoxic drugs - aspirin and naproxen
6. Severe tinnitus can cause depression or anxiety

Question 11

What is vertigo?

Answer 11

1. Rotational spinning with dysfunction of labyrinth
2. Objective vertigo - room is spinning
3. Subjective vertigo - self is spinning

Question 12

What are the 2 types of conduction of sound and describe them.

Answer 12

1. Air Conduction
   A. Sound waves travel through external ear and tympanic membrane then vibrate that travels to the Oval window of the cochlea via ossicles
2. Bone Conduction
   A. Vibration of the skull bones. Travels directly to inner ear/cochlea bypassing external and middle ear

Question 13

What is Pure tone audiometery

Answer 13

1. Assesses ability to hear tones at different frequencies
2. Quantitative measure of hearing

Question 14

What are the 2 types of hearing loos?

Answer 14

1. Conductive
2. Sensorineural

Question 15

What is conductive hearing loss?

Answer 15

1. Problem of external or middle ear
2. Impacted cerumen
3. Foreign bodies
4. Perforated tympanic membrane
5. Pus or serum in middle ear
6. Otosclerosis

Question 16

Sensorineural hearing loss ?

Answer 16

1. Inner ear, CN VIII, or cerebral cortex
2. Presbycusis
3. Ototoxic drugs