Vision + Hearing Development + Anatomy Flashcards
Visual acuity in newborn
20/100 to 20/400
**not fully myelinated
visual acuity in 1-2 yr
20/50
visual acuity in 6-7 yr
20/20
eyes are aligned + coordinated by…
3 months
estuchian tube is in the…
middle ear
hearing 20 weeks
begin hearing
hearing 5 months
auditory nerve function matures
if hearing deficit is present, early interventions are needed by…
6 months of age
myopia usually develops…
around 8 yo
hyperopia is common until…
9-10 yo
—not usually detected until 7 yo because of accommodation
nasopharynx
smaller
-easily occluded during infectn
lymph tissue [tonsils + adenoids]
grows rapidly in early childhood
-atrophies at 12 yo
nares
smaller + easily occluded
small oral cavity + large tongue incr the risk for…
obstruction
epiglottis
long, floppy
-vulnerable to swelling»> obstruction
larynx + glottis
higher in neck
-incr risk for aspiration
fewer muscles are functional in airway, which means…
iit is less able to compensate for edema, spasm, + trauma
large amounts of soft tissue + loosely anchored mucous membranes
incr risk for edema + obstructions
airway diameter
infant vs adult
infant: 4 mm
adult: 20 mm
use of diaphragm for resp is until…
6 yo
retraction is seen as…
diaphragm pulls down + ribs pull in fr neg pressure
mild retraction
intercostal
mod retraction
substernal + suprasternal
severe retractoin
supraclavicular
subcostal
sternocleidomastoid + trapezius muscle
estuchian tube
shorter + more horizontal
|»_space;>leads to decr drainage
otitis media is most common in…
first 24 mos
then again around 5-6 yo
end of eustachian tube in nasal pharynx opens during…
sucking
periodic breathing
infants
-cessation of resp up to 20 sec is normal
