scholarly journals Assessment of Vestibular and Oculomotor Function in Patients with Vestibular Migraine: A Preliminary Study

2020 ◽  
Author(s):  
Wei Fu ◽  
Junliang Han ◽  
Feng He ◽  
Ya Bai ◽  
Dong Wei ◽  
...  
Keyword(s):  
Vestibular Function ◽  
Test Group ◽  
Vestibular Migraine ◽  
Vestibular Evoked Myogenic Potentials ◽  
Caloric Irrigation ◽  
Function Test ◽  
Abnormal Rate ◽  
Vestibular Function Test ◽  
Oculomotor Function ◽  
The Relationship

Abstract Background: The purpose of the study is to assess the vestibular and oculomotor function in patients with vestibular migraine(VM).And we also investigate the relationship between test resultsandeffectiveness of prophylactic medication.Methods: We recruited 41 patientswith VM. They were examinedwith vestibular-evoked myogenic potentials(VEMP), video head impulse test(vHIT) and videonystagmography(VNG), including spontaneous or positional nystagmus, gaze-evoked nystagmus, smooth pursuit and caloric irrigation testing.All VM patients were treated withprophylactic medications. Theintensity of vertigo were evaluated with dizziness handicap inventory(DHI) before and after treatment. After 6 months, we evaluate the effectiveness of prophylactic medication. We analyzed the relationship between test resultsandeffectiveness of prophylactic medication.Results:In vestibular function test,71% of VM patients showed abnormal result. 20% showed abnormal air-conducted cVEMP and 42% showed abnormal air-conducted oVEMP. 32% showed abnormal vHIT and 56% showed abnormal caloric irrigation test.The abnormal rate of oVEMP was significantly higher than cVEMP (p<0.05). And the abnormal rate of caloric irrigation test was significantly higher than vHIT(p<0.05). In oculomotor function test, 42% showed pathological result. The abnormal rate of oculomotor function test was significantly lower than vestibular function test (p<0.05). After 6 months follow-up, rate of good effectiveness was significantly higher in normal vestibular function test group compared with the abnormal vestibular function test group (p<0.05). Rate of good effectiveness was no statistically significant difference between normal oculomotor function test group and abnormal oculomotor function test group (p>0.05).Conclusions: Abnormal vestibular and oculomotor function are commonly observed in VM patients. And VM patients with abnormal vestibular function have a weak effectiveness of prophylaxis medications.

scholarly journals Worldwide survey on laboratory testing of vestibular function

2019 ◽  
Vol 10 (5) ◽  
pp. 379-387 ◽  
Author(s):  
Michael Strupp ◽  
Joy Grimberg ◽  
Julian Teufel ◽  
Göran Laurell ◽  
Herman Kingma ◽  
...  
Keyword(s):  
Reference Values ◽  
Vestibular Function ◽  
Vestibular Evoked Myogenic Potentials ◽  
Head Impulse Test ◽  
Slow Phase ◽  
Bilateral Vestibulopathy ◽  
Large Variability ◽  
Horizontal Canal ◽  
Caloric Irrigation ◽  
Cutoff Values

BackgroundThe function of the peripheral vestibular system can nowadays be quantified. The video head impulse test (vHIT) and caloric irrigation are used for the semicircular canals, cervical vestibular evoked myogenic potentials (cVEMP) for the sacculus, and ocular vestibular evoked myogenic potentials (oVEMP) for the utriculus. Because there is no agreement on normal and pathologic values, we performed a worldwide survey.MethodsA web-based standardized survey questionnaire was used to collect data on “reference values” and “cutoff” values. Thirty-eight centers from all continents (except Africa) replied.Results“Reference values”: vHIT: mean for the vestibulo-ocular reflex gain of the left horizontal canal 0.91 (range: 0.7–1.01) and of the left horizontal canal 0.92 (0.7–1.05); side difference 0.15 (0.25–0.3). Caloric irrigation: mean peak slow phase velocity of caloric-induced nystagmus for warm (44°C) water 18.65°/s (12–30°/s); cold (30°C) water 18.21°/s (10–25°/s). cVEMP: P13-N23 amplitude mean for the lower limit 28.67 μV (16–50 μV); upper limit 200 μV (50–350 μV). “Cutoff values”: vHIT: side difference 0.26 (0.1–0.4), bilateral vestibulopathy <0.61 (0.3–0.8); unilateral vestibulopathy (UVP) <0.68 (0.4–0.8). Caloric irrigation pathologic side difference mean 25.93% (17.7%–40%) or 12°/sec (5–30°/s); side difference UVP 26.73% (20%–40%) or 29.8°/s (5–100°/s). cVEMP: P13/N23 amplitude mean lower cutoff 32.5 μV (15–50 μV), mean upper cutoff 125 μV (50–200 μV), asymmetry 36.08 μV (20–50 μV).ConclusionThis worldwide survey showed a large variability in terms of reference and pathologic cutoff values in the 38 centers included. Therefore, standardization of how to achieve these values and agreement on which values should be used is highly warranted to guarantee a high quality of vestibular testing and interpretation of clinical and scientific results.

scholarly journals Laboratory Management Status of Vestibular Function Test in Korea

2018 ◽  
Vol 17 (4) ◽  
pp. 160-166
Author(s):  
Tae Su Kim ◽  
Mi Joo Kim ◽  
Byung-Kun Kim ◽  
Hyun Ah Kim ◽  
Dae Woong Bae ◽  
...  
Keyword(s):  
Vestibular Function ◽  
Laboratory Management ◽  
Function Test ◽  
Vestibular Function Test

scholarly journals Cervical Vestibular-Evoked Myogenic Potentials: Norms and Protocols

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Suwicha Isaradisaikul ◽  
Niramon Navacharoen ◽  
Charuk Hanprasertpong ◽  
Jaran Kangsanarak
Keyword(s):  
Vestibular Function ◽  
Tone Burst ◽  
Contralateral Side ◽  
Vestibular Evoked Myogenic Potentials ◽  
Normative Values ◽  
Vestibular Evoked Myogenic Potential ◽  
Reference Guide ◽  
Inferior Vestibular Nerve ◽  
Set Up ◽  
Vestibular Function Test

Vestibular-evoked myogenic potential (VEMP) testing is a vestibular function test used for evaluating saccular and inferior vestibular nerve function. Parameters of VEMP testing include VEMP threshold, latencies of p1 and n1, and p1-n1 interamplitude. Less commonly used parameters were p1-n1 interlatency, interaural difference of p1 and n1 latency, and interaural amplitude difference (IAD) ratio. This paper recommends using air-conducted 500 Hz tone burst auditory stimulation presented monoaurally via an inserted ear phone while the subject is turning his head to the contralateral side in the sitting position and recording the responses from the ipsilateral sternocleidomastoid muscle. Normative values of VEMP responses in 50 normal audiovestibular volunteers were presented. VEMP testing protocols and normative values in other literature were reviewed and compared. The study is beneficial to clinicians as a reference guide to set up VEMP testing and interpretation of the VEMP responses.

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