Vestibular Exam Lab Flashcards
spontaneous nystagmus is more common in the ____ stage of peripheral vestibular impairment
acute
what is an abnormal result during the optokinetic nystagmus test?
asymmetrical response
what is a normal result during the optokinetic nystagmus test?
opposite beating nystagmus of the direction of the test
what is the gold standard test for dx VOR dysfunction with peripheral pathology?
HIT (head thrust)
what are abnormal responses during the HIT/head thrust?
-Corrective saccade and/or post-thrust nystagmus (suggest peripheral hypofunction)
-Eyes go with head (worse when going toward impaired side)
HIT/head thrust: if pt has normal eye movement, but they experience vertigo, what does this tell you?
VOR is preserved, but concerning for CNS
Head Shake Test: presence of post-shake nystagmus is a strong clinical indicator of what?
non-compensated injury
what are some abnormal results you might see during the Head Shake Test?
-Greater than 3 beats of post-shake nystagmus (clinically significant for unilateral vest. dysfunction)
-Vertical nystagmus = central pathology
patients with ____ vest. hypofunction will fail the Dynamic Visual Acuity test
bilateral
the Dynamic Visual Acuity test is better at identifying dysfunction in the ____ and ____ stages of vest. disorder
subacute, chronic
what is considered a significant deviation from baseline on the Dynamic Visual Acuity test?
at least 3 lines
Skew Deviation test assesses for vertical ____ gaze
conjugate
what is an abnormal response during the Skew Deviation test?
deviation of one eye while it’s being covered, followed by correction when you uncover it
what is a normal response during the Skew Deviation test?
eyes don’t move
what is an abnormal result during the VOR Cancellation test?
ipsi corrective saccades
