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].
Further, lesions to the inferior parieto-temporal area can eliminate the perception of vertigo during caloric stimulation while the nystagmus response is preserved [40].
Caloric stimulation with the closed-loop caloric irrigator was administered with the alternate binaural bithermal (ABB) and the simultaneous binaural bithermal (SBB) tests.
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.
Caloric stimulation is an "artificial," but convenient, way to evaluate the adequacy of the vestibular system by causing the endolymph to move in the semicircular canal (due to a convection current) even when the head is still.
In the case described herein, the abnormality was reflected as a hyperactive response to the bithermal
caloric stimulation in the left ear.
16,17) Also, when nodulectomy was performed on cats, previously acquired habituation to
caloric stimulation was lost.
She exhibited the same left-beating nystagmus while supine with both the 0[degrees] and 30[degrees] positions, as well as before and after
caloric stimulation.
Some of these findings, especially the hyperactive responses to
caloric stimulation, might have reflected the effects of his drug therapy.
The preferred medium for
caloric stimulation is water.
The range of vestibular function tested by
caloric stimulation is limited.
