Ear-External Flashcards
(28 cards)
2 primary functions of the ear?
- Hearing
2. Static and dynamic equilibrium (balance at rest and during body motion)
Fancy name for ear wax?
Cerumen
The external ear consists of the ear pinna, into the ear canal, and stops at what landmark?
Tympanic membrane
The middle ear consists of what 3 things?
- Tympanic membrane
- Ossicles
- Eustachian tube
Common name for the tympanic membrane?
Ear drum
From lateral to medial, name the 3 ossicles:
- Malleus
- Incus
- Stapes
The shortest muscle in the body? (In middle ear)
Stapedius
Muscle in the middle ear connecting to the malleus, running along eustachian tube
Tensor tympani
The stapes transmits vibrations to the ___ window
Oval
This part of the ear helps to equalize the air pressure in the middle ear with that of the outside air, and ensures that the tympanic membrane is at proper tension. It is CLOSED, most of the time.
Eustachian tube
The stapedius muscle is innervated by CN __, while the tensor tympani is innervated by CN __
VII (facial), CN V (trigeminal)
The tensor tympani helps to dampen ___ sounds, while the stapedius helps to dampen ___ sounds.
Chewing (T=Teeth), Singing (S=Singing)
The INNER ear is made of what 3 things?
- Cochlea
- Utricle and Saccule
- Semicircular canals
What cranial nerve innervates the INNER ear?
CN VIII (vestibulocochlear)
The utricle and saccule provide information about the body ____ (at rest, in motion), while the semicircular canals do the opposite.
At rest (semicircular canals= in motion)
List the “big four” ear complaints:
- Hearing loss
- Equilibrium or balance problems
- Dizziness, vertigo
- Tinnitus (auditory paresthesia)
Fancy name for small ears (pinna is underdeveloped)
Microtia
The absence or abnormal narrowing of an opening or passage in the body
Atresia
A completely undeveloped pinna is referred to as ____
Anotia
Which type of scarring is more permanent? Keloid or hypertrophic scarring
Keloid (hypertrophic scarring is usually due to improper cleaning/changing of jewelry)
What is the street name for an outer ear infection (otitis externa)?
Swimmer’s ear
Exam findings for a patient w/OE would most likely include pain while pressing or manipulating the ____
Tragus (or pinna)
Name a common type of anti-inflammatory drug:
Corticosteroid
Surfer’s ear (exostosis) is due to _____
Repeated exposure to cold water and wind