vestib Flashcards
Wuyts, Furman, Vanspauwen, & Heyning (2007)
” During the last decade, vestibular testing has evolved such that the vertical canals and otolith organs can be assessed, along with the horizontal semicircular canals
Brandt & Strupp (2004)
” Videonystagmography is the most common method of vestibular assessment
Wuyts et al. (2007) vng
” Ocular motility testing will evaluate the central pathways required for the function of the vestibulo-ocular reflex (VOR)
“ Abnormalities on ocular motility testing usually reflect a central lesion or neurologic disorder
McCaslin et al. (2008)
” Static positional testing is completed in vision denied, since positional nystagmus can be centrally suppressed
Jeffery et al. (2017)
” When static positional evaluations reveal nystagmus in 4 or more positions, a peripheral vestibular asymmetry should be considered
Baloh & Kerber (2011)
” Caloric irrigation fixation suppression can also identify a central vestibular lesion if a patient fails to adequately suppress a caloric-induced nystagmus response with visual fixation
Macdougall et al. (2013)
” Since the aforementioned VNG testing primarily attends to the function of the horizontal semicircular canal, the VHIT can be completed to evaluate the anterior and posterior semicircular canals when the head movements are delivered in the planes of the vertical canals
“ VHIT assessment of the vertical canals can provide evidence of isolated loss of peripheral vestibular function in the vertical canals, differentiate symptoms from a central pathology, confirm clinical suspicion of a diagnosis, assist in the diagnosis of superior canal dehiscence, and confirm posterior canal occlusion after surgery for intractable BPPV
Wuyts et al. (2007) rotary
” Measures obtained from earth-vertical axis rotation include: sinusoidal harmonic rotation (with parameters of gain, phase, and symmetry), visual fixation, visually enhanced VOR, and velocity step testing
Wuyts et al. (2007); Kaplan et al. (2001)
” Despite some drawbacks of EVAR, the technique provides complimentary information to the caloric test
Arriaga et al. (2005)
” Demonstrated that EVAR has greater sensitivity whereas caloric irrigations have greater specificity for peripheral vestibulopathy
Kaplan et al. (2001)
” Currently, rotational testing is the gold-standard for identifying bilateral vestibular dysfunction.
Colebatch, Halmagyi, & Skuse (1994)
” cVEMP is an inhibitory potential measured from the ipsilateral contracted sternocleidomastoid muscle in response to loud sounds
Colebatch et al. (1994)
” The cVEMP response is abolished by selective vestibular neurectomy, but may be present despite profound hearing loss as long as there is not a sufficient conductive component present to attenuate the stimulus
Minor (2005); Sheykoholeslami et al. (2004)
” The study of VEMPs compliments previously mentioned tests in that it can provide unique information about possible lesions of the otolith organs. cVEMP in particular has value in representing the saccule and inferior vestibular nerve branch and can aid in diagnosis of Tullio phenomenon, superior canal dehiscence, and inferior vestibular neuronitis.
Rauch (2006)
” Patients with endolymphatic hydrops appear to have altered frequency tuning and elevated thresholds on VEMP testing.
