ear stuff Flashcards Preview

Neuro exam 3 > ear stuff > Flashcards

Flashcards in ear stuff Deck (22)
Loading flashcards...
1
Q
VOR reflex allows for
A
eyes to maintain focus on a point of interest during head movement
2
Q
What is the fastest reflex in the body?
A
VOR
3
Q
how does VOR work?
A
1. inner ear senses head rotation in any direction
2. signal sent to MLF to abducens, trochlear, oculomotor nuclei
3. eyes move in precisely opposite direction of head movement
4. net effect: eyes remain steady in space
4
Q
VCR functions to
A
help maintain stability and upright stance of the head
5
Q
VCR works by
A
vestibular systems sense the direction of gravity and initiates motor reflexes in the muscle controlling the head and neck that serve to right the head
6
Q
VSR functions to
A
assist balance and provide a framework for coordinated motion of the limb during ambulation
7
Q
In response the gravity, the VSR provides
A
continuous muscular tone that acts as a priming framework for muscle action
8
Q
VSR: righting reflex
A
when the upright human is pushed to one side, the limbs on half the body tend to extend, whole those on the opposite side tend to flex

serves to rebalance the body
9
Q
acute otitis media (AOM) signs
A
1. pain
2. sensation of fullness in ear
3. inflammation of TM
3. middle ear effusion
10
Q
if AOM and erythema, edema and otorrhea
A
perforation
11
Q
AOM treatment
A
1. watchful waiting in low risk pt
2. systemic antibiotics--amoxicillin
3. tympanocentesis for culture or acute pain control
4. myringotomy/mastoid surgery in complicated cases
12
Q
fluid in the middle ear can take___ to drain
A
up to 3 months
13
Q
otitis media with effusion signs
A
1. recurrent episodes of AOM
2. pain, fullness, popping
3. irritability and sleep disturbances
4. imbalance, delayed gross motor development
5. delayed speech and language development (hearing loss)
14
Q
otitis media with effusion treatment
A
1. pressure equalizer tube insertion
2. adenoidectomy is associated nasal obstruction or sleep apnea
3. antibiotics, histamine and steroids DO NOT WORK
15
Q
tympanic membrane perforation
A
1. more common in adults
2. erupt, drain, can become infected
3. keratin ball with lives cells
4. grows and causes local damage
16
Q
TM perforation can lead to
A
cholesteatomas
17
Q
TM perforation treatment
A
surgical removal
18
Q
Otosclerosis epidem
A
white women 30-50
19
Q
What is Otosclerosis?
A
1. localized disorder of bone remodeling
2. stapes fixation
3. progressive
4. unilateral or bilateral
20
Q
Otosclerosis is associated with
A
sensorineural hearing loss
21
Q
Otosclerosis treatment
A
1. stapedectomy: freeing of stapedius foot plate
2. replace with prosthetic
22
Q
Causes of Otosclerosis
A
1. COL1A1 and aggrecan mutation
2. measles