Audilogy Terms Flashcards
What happens from week 4 to 8 gestation?
3 germ layers grow and develop landmarks which later develop into organs
What are the three layers called?
ectoderm
medoderm
endoderm
ectoderm
create the central and peripheral nervous system. Including the inner ear.
Mesoderm
Heavily involved in bone ,cartilage, muscles
endoderm
epithelia membranes of the digestive and respiratory system.
When is ear development complete?
20th week of gestation.
How long does the external ear continue to mature for?
age 9
Neuroplasticity
- brain’s ability to reorganize itself.
- Forms new connections and pathways in response to sensory and motor input.
- Learning new skills or in creating new memories upon which to build additional behaviors.
Critical periods
first 2 or 3 years of life
Moro reflex
hear, arm and whole body startle reflex
Aural palpebral response
eye blink
Apgar score
At birth the newborn is graded for how sick or healthy he/she is at 1 minute and again at 5 minutes.
Atresia
a completely filled in or closed external ear canal
Exostoses
multiple bony growths
Osteomas
single bony growth
Serous OM:
OM with fluid (effusion) that is clear and without pus or blood.
Adhesive OM
usually the result of chronic long term OM with a sticky effusion. Fibroblasts or fibers in it.
Tympanosclerosis
Shiny white deposits of hyalinized or calcified scar tissue.
Cholesteatoma
leave a little pocket in this outer layer and the dead cells fall into it causing a skin filled cyst to grow into the middle ear.