Outline 16- The Ear Flashcards
What is pinna?
Outer auricle of ear
What is tragus?
Has intertragic notch
Antitragus
What does the helix consist of?……
Crux
Auricular notch
Lobule or lobe
Antihelix?……..
Also has the crura
External acoustic meatus means what?
Opening of ear
Concha of auricle means what?
Inside ear
Middle ear ……..
At bottom of ear canal?
Where ear drum is?
Yes
What is another name for ear drum?
Tympanic membrane
Outer ear has 5 main areas…. Name them
Pinnacle Tragus Helix Anti helix External acoustic meatus
Ear drum considered like warden of gate for middle ear?
Yes
When there is no reflection on cone of light of tympanic membrane what could this mean?
Fluid in ear
Tidis media
Something is wrong
When eardrum vibrates…..
It moves malleus…..
That hammer through joint of incus and stapes….
And transmits vibration?
Yes
Middle ear drain through eustation tube?
Yes
Can an ear infection lead to meningitis?
Yes
When one is sick with cold or ear infection what swells shut?
Mucosa
So ossicular chain goes from eardrum, vibration is transmitted thru bone?
Yes
What type of joints are between bones in ear?
Synovial joints
So…..
Foot of stapes is pressed against oval window and oval window is membrane ours reflection of timpani can membrane so when membranous window vibrates ossicular chain…… Does it move fluid in inner ear?
Yes
We hear because of movement of fluid?
Yes
Is the inner ear open to aire?
No
Is inner ear fluid filled?
Yes
Change in pressure of inner ear inform the body of orientation (lying down, standing)?
Yes
Fluid movement in chicle a transmits …?
Pitch
Are semicircular canals and cochlea closed systems?
Yes
What is tambour?
Quality of sound
Do we hear because of mechanical movement?
Yes
Is chicle a organ of hearing( austere)?
Yes
