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.
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 [10], deep brain stimulation [11], and vestibular
caloric stimulation [12].
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 [29], 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.
Caloric stimulation with the closed-loop caloric irrigator was administered with the alternate binaural bithermal (ABB) and the simultaneous binaural bithermal (SBB) tests.
