vestibular 1/16 Flashcards
test central or peripheral vestibular issue?
sponatenous nystagmus
both
peripheral - acute
test central or peripheral vestibular issue?
gaze evoked nystagmus
peripheral
test central or peripheral vestibular issue?
head shaking
head thrust
peripheral
test central or peripheral vestibular issue?
dynamic visual acuity DVA
both
test central or peripheral vestibular issue?
valsalva
peripheral
test central or peripheral vestibular issue?
dix hallpike
roll test for BPPV
peripheral
test central or peripheral vestibular issue?
saccadic eye movement
central
test central or peripheral vestibular issue?
convergence
central
test central or peripheral vestibular issue?
VOR cancellation
central
what test is this?
- look for abnormal eye beating in ambient room light
- test with goggles (to remove visual fixation, suppresses nystagmus)
- try to identify direction of fast phase
- nystagmus can be up beating, down beating, left beating, right beating, torsional
spontaneous nystagmus
central or peripheral? what next? \+ spontaneous nystagmus \+ abnormal smooth pursuit \+ saccadic eye motion \+ abnormal VOR cancellation
known neurologic condition clinician knows
OR central vestibular signs > refer to MD
central or peripheral?
nystagmus with goggles on (to remove visual fixation, suppresses nystagmus)
either
- patient may have acute, not compensated by CNS, peripheral hypofunction
- OR central vestibular sign and needs to be referred to MD
central or peripheral?
during smooth pursuit and convergence eye exam
+ delay or saccadic intrusions during eye movement
+ abnormal double vision when >3-4 inches from nose
possible central vestibular dysfunction
central or peripheral?
saccadic eye movements
+ abnormal multiple >2 movements to get to target, under or overshoots target
possible central vestibular dysfunction
what test?
patient sits 18 inches away
ask patient look back and forth between 2 targets - R/L, up/down
- observe if hits target in 1-2 movments or multiple movement, under or overshoots target
saccadic eye movement
what test?
patient sits with arm extended in front of nose and eyes on thumb nail
rotate trunk R/L, head rotates with trunk,
- nose and eyes remain aligned on thumbnail
- perform R/L, and up/down
VOR cancellation
tests ability to cancel VOR and move eyes together with head
central or peripheral?
VOR cancellation
head moves together with minimal to no symptoms
normal
central or peripheral?
VOR cancellation
+ abnormal, unable to keey eyes on target, dizziness, or other symptoms reported by patient
possible central vestibular dysfunction
what test is this?
wear goggles (prevent visual fixation)
ask patient move eyes L, R, up, down, and back to center (only 30 degrees, not end range)
- observe for nystagmus when hold each direction
gaze evoked nystagmus
central or peripheral?
gaze evoked nystagmus test
+ nystagmus direction fixed, always beat in same direction no matter which way patient looks
peripheral lesion follows alexander’s law
central or peripheral?
gaze evoked nystagmus test
+ nystagmus direction changes based on direction patient looks (upbeat when look up, downbeat when look down)
central lesion
what test?
wear goggles (prevent visual fixation)
head in 30deg cervical flexion
patient closes eyes
turn head R/L 20reps, ask patient open eyes at 18 reps
after 20, hold head stable observe if nystagmus present
head shaking nystagmus
central or peripheral? head shaking nystagmus test \+ nystagmus fast phase direction toward active or hypofunction side? what other test aligns with?
peripheral
- fast phase toward intact, more active neural side
- contralateral side has vestibular hypofunction
= coincides with + head thrust test
what test?
ambient room light, fixate eyes on target like therapist’s nose
- hold head 30 deg cervical flexion
- quickly rotate head 30deg R/L while eyes remain fixated on target
- repeat R/L in random order, pause after each rep
- observe any delay, eye move off target and delay return to target
head thrust test
central or peripheral?
head thrust test
+ eye move off target and delay return to target
what side is delay on active or impaired side?
peripheral - unilateral or bilateral hypofunction
delay occurs on impaired side
what test?
patient sits 4 ft from eye chart
- read down to lowest line they are able to easily read
- manually move patient head side to side 120bpm (tik tok by kesha) as patient reads chart top to bottom
- notice different between what is read at the bottom line while static vs moving
dynamic visual acuity DVA
tests VOR vestibulocular reflex, ability eyes stabilize target while head moves
central or peripheral?
DVA
2 lines different when reading eye chart between static vs moving
normal
<=2 lines different
central or peripheral?
DVA
3 lines or less different when reading eye chart between static vs moving
either
decreased VOR reflex
possible peripheral hypofunction or underlying central dysfunction