Interpretation of ENG results are based on the response of the vestibular system to stimuli from change in position and to caloric stimulation
. The result is obtained in the form of butterfly chart, which is a graph depicting the nystagmus response to caloric stimulation
and video-head impulse testing in Meniere's disease and vestibular migraine.
Videonystagmograpy (VNG) with caloric stimulation
has been widely used in the analysis of severity of vestibular disorders.
In the patients, air caloric stimulation
was performed using Micromedical Air Fx caloric irrigator (Micromedical Technologies, Illinois).
The nonpharmacological treatment includes the use of repetitive transmagnetic stimulation , deep brain stimulation , and vestibular caloric stimulation
The caloric stimulation
test has been widely used to examine vestibular performance in clinical medicine.
Stimulation of this region was found to generate the sensation of dizziness by Penfield , and this same region is active during caloric stimulation
in humans [30-31].
Up to 25%, of migraineurs with vestibular symptoms have been reported to have reduced responses to caloric stimulation
upon laboratory testing, suggesting de creased labyrinthine sensitivity.
Up to 25% of migraineurs with vestibular symptoms have been reported to have a reduced response to caloric stimulation
upon laboratory testing, which suggests a decrease in labyrinthine sensitivity.
Before performing caloric stimulation
, check that the patient's ear drum is intact.
Vestibular caloric stimulation
done on 9 patients showed a reduction of pain by 2.58 on a scale of 10 against 0.54 in the placebo group.
with the closed-loop caloric irrigator was administered with the alternate binaural bithermal (ABB) and the simultaneous binaural bithermal (SBB) tests.