scholarly journals Spontaneous Upbeat Nystagmus and Selective Anterior Semicircular Canal Hypofunction on Video Head Impulse Test: A New Variant of Canalith Jam?

2021 ◽  
Author(s):  
Andrea Castellucci ◽  
Cecilia Botti ◽  
Salvatore Martellucci ◽  
Pasquale Malara ◽  
Silvia Delmonte ◽  
...  
Keyword(s):  
Semicircular Canal ◽  
Head Impulse Test ◽  
Video Head Impulse Test ◽  
Head Impulse ◽  
New Variant ◽  
Anterior Semicircular Canal ◽  
Upbeat Nystagmus

Vestibular semicircular canal function as detected by video Head Impulse Test (vHIT) is essentially unchanged in people with Parkinson’s disease compared to healthy controls

2021 ◽  
pp. 1-9
Author(s):  
Kim E. Hawkins ◽  
Elodie Chiarovano ◽  
Serene S. Paul ◽  
Ann M Burgess ◽  
Hamish G. MacDougall ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Semicircular Canal ◽  
Neurodegenerative Disorder ◽  
Vestibular Function ◽  
Head Impulse Test ◽  
Healthy Controls ◽  
Video Head Impulse Test ◽  
Head Impulse ◽  
Vestibulo Ocular Reflex

BACKGROUND: Parkinson’s disease (PD) is a common multi-system neurodegenerative disorder with possible vestibular system dysfunction, but prior vestibular function test findings are equivocal. OBJECTIVE: To report and compare vestibulo-ocular reflex (VOR) gain as measured by the video head impulse test (vHIT) in participants with PD, including tremor dominant and postural instability/gait dysfunction phenotypes, with healthy controls (HC). METHODS: Forty participants with PD and 40 age- and gender-matched HC had their vestibular function assessed. Lateral and vertical semicircular canal VOR gains were measured with vHIT. VOR canal gains between PD participants and HC were compared with independent samples t-tests. Two distinct PD phenotypes were compared to HC using Tukey’s ANOVA. The relationship of VOR gain with PD duration, phenotype, severity and age were investigated using logistic regression. RESULTS: There were no significant differences between groups in vHIT VOR gain for lateral or vertical canals. There was no evidence of an effect of PD severity, phenotype or age on VOR gains in the PD group. CONCLUSION: The impulsive angular VOR pathways are not significantly affected by the pathophysiological changes associated with mild to moderate PD.

scholarly journals The Video Head Impulse Test (vHIT) Detects Vertical Semicircular Canal Dysfunction

PLoS ONE ◽  
2013 ◽  
Vol 8 (4) ◽  
pp. e61488 ◽  
Author(s):  
Hamish Gavin MacDougall ◽  
Leigh Andrew McGarvie ◽  
Gabor Michael Halmagyi ◽  
Ian Stewart Curthoys ◽  
Konrad Peter Weber
Keyword(s):  
Semicircular Canal ◽  
Head Impulse Test ◽  
Video Head Impulse Test ◽  
Head Impulse ◽  
Vertical Semicircular Canal

Evaluation of Semicircular Canal Function by Video Head Impulse Test in Patients With Facial Nerve Schwannoma

2020 ◽  
Vol 41 (5) ◽  
pp. e615-e622
Author(s):  
Keishi Fujiwara ◽  
Shinya Morita ◽  
Yasushi Furuta ◽  
Hiroko Yanagi ◽  
Kimiko Hoshino ◽  
...  
Keyword(s):  
Facial Nerve ◽  
Semicircular Canal ◽  
Head Impulse Test ◽  
Video Head Impulse Test ◽  
Head Impulse ◽  
Facial Nerve Schwannoma

scholarly journals Application of the Video Head Impulse Test to Detect Vertical Semicircular Canal Dysfunction

2013 ◽  
Vol 34 (6) ◽  
pp. 974-979 ◽  
Author(s):  
Hamish G. MacDougall ◽  
Leigh A. McGarvie ◽  
G. Michael Halmagyi ◽  
Ian S. Curthoys ◽  
Konrad P. Weber
Keyword(s):  
Semicircular Canal ◽  
Head Impulse Test ◽  
Video Head Impulse Test ◽  
Head Impulse ◽  
Vertical Semicircular Canal

Video Head Impulse Test to Preoperatively Identify the Nerve of Origin of Vestibular Schwannomas

2018 ◽  
Vol 16 (3) ◽  
pp. 319-325 ◽  
Author(s):  
Felipe Constanzo ◽  
Patricia Sens ◽  
Bernardo Corrêa de Almeida Teixeira ◽  
Ricardo Ramina
Keyword(s):  
Semicircular Canal ◽  
Internal Auditory Canal ◽  
Hearing Preservation ◽  
Vestibular Nerve ◽  
Head Impulse Test ◽  
Video Head Impulse Test ◽  
Head Impulse ◽  
Vestibular Diseases ◽  
Cystic Component ◽  
Nerve Of Origin

AbstractBACKGROUNDIdentification of the nerve of origin in vestibular schwannoma (VS) is an important prognostic factor for hearing preservation surgery. Thus far, vestibular functional tests and magnetic resonance imaging have not yielded reliable results to preoperatively evaluate this information. The development of the video head impulse test (vHIT) has allowed a precise evaluation of each semicircular canal, and its localizing value has been tested for some peripheral vestibular diseases, but not for VS.OBJECTIVETo correlate patterns of semicircular canal alteration on vHIT to intraoperative identification of the nerve of origin of VSs.METHODSA total 31 patients with sporadic VSs were preoperatively evaluated with vHIT (gain of vestibule-ocular reflex, overt and covert saccades on each semicircular canal) and then the nerve of origin was surgically identified during surgical resection via retrosigmoid approach. vHIT results were classified as normal, isolated superior vestibular nerve (SVN) pattern, isolated inferior vestibular nerve (IVN) pattern, predominant SVN pattern, and predominant IVN pattern. Hannover classification, cystic component, and distance between the tumor and the end of the internal auditory canal were also considered for analysis.RESULTSThree patients had a normal vHIT, 12 had an isolated SVN pattern, 5 had an isolated IVN pattern, 7 had a predominant SVN pattern, and 4 had a predominant IVN pattern. vHIT was able to correctly identify the nerve of origin in 89.7% of cases (100% of altered exams).CONCLUSIONThe pattern of semicircular canal dysfunction on vHIT has a localizing value to identify the nerve of origin in VSs.

Bilateral posterior semicircular canal dysfunction: a new finding with video head impulse test

2020 ◽  
Vol 267 (8) ◽  
pp. 2347-2352
Author(s):  
Florencia Lerchundi ◽  
Alfredo Hernan Laffue ◽  
Marina Olivier ◽  
Francisco Jose Gualtieri
Keyword(s):  
Semicircular Canal ◽  
Head Impulse Test ◽  
Video Head Impulse Test ◽  
Posterior Semicircular Canal ◽  
Head Impulse ◽  
New Finding
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