Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

8.AUD-Middle Ear

Audiology SLP314

TermDefinition
Function of Middle Ear (ME) Overcomes transmission loss during transfer of sound energy from air medium (outer ear) to fluid medium (inner ear). Increases pressure to inner ear.
ME spaces 1.Tympanum, 2.Epitympanic recess (tympanic attic).
Eustachian tube functions (2) 1. Equalize pressure between ME & ear canal. 2. Drains ME secretions.
Mastoid air cells Portion of temporal bone behind tympanic attic filled with air pockets. Aditus ad antrum connects attic to air cells. Potential path of infection.
Windows (2) 1. Oval (filled by stapes footplate) 2. Round window covered by thin membrane (pressure release)
Ossicular chain (3 parts) Malleus. Incus. Stapes
Malleus (3 parts) 1. Head (in attic). 2. Manubrium (Umbo attaches to center of TM). Lateral process (attached to top of TM (pars flaccida)
Incus (3 parts) 1. Body (attached to head of malleus) 2. Long crus 3. Lenticular process (90 deg turn in long crus, attaches to head of stapes).
Stapes head, neck, 2 crus, footplate, annular ligament
Ossicle ligaments 3 on malleus, 1 on incus. Maintain bone positions with head movements.
2 ways ME increases pressure to inner ear. 1. Difference in area from TM to oval window (17x = 25 dB) 2. Leverage force (manubrium is longer than long crus of incus (3-5 dB). Overall 28-30 dB gain.
ME muscles (2) 1. Tensor tympany (CN V, attaches to malleus and tenses TM, decreases vibration) 2. Stapedius (CN VII, acoustic reflex above 85 dB)
Disorders of ME (2) Serous otitis media. Suppurative OM
Serous OM: stages 1. Eustachian tube dysfunction (blockage) 2. Negative ME pressure (TM retracts) 3. ME effusion(fluid sucked out of lining
Serous OM: treatment 1. May resolve spontaneously 2. Pressure equalizing tubes (PET- children) or myringotomy 3. Remove underlying problem (adenoids, allergies, smoke) 4. Antibiotics (preventative)
Created by: ashea01
Popular Speech Therapy sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards