[Stabilometry and definition of the threshold of galvanic vestibular stimulation in normal subjects: an experimental study].
The effect of the galvanic stimulation on the vestibular apparatus has been evaluated by registration on the postural deviations, using a stabilometry platform. We have studied the galvanic body-sway responses in a group of normal subjects, using a binauricolar bipolar stimulation, with the electrodes attached by means of surgical tape to the mastoid area. The records of body-sway responses have demonstrated in 80% of the considered cases a significant variation of all positional parameters after a current intensity of 2 mA, according the body sways toward the positive stimulus. At the same current intensity only five of the studied subjects have shown multidirectional swinging, in three cases joined with a subjective slight sway toward the ear stimulated with positive polarity. Therefore the galvanic test, joined with the posturography, proves to be a useful auxiliary method in vestibular investigation, allowing us to lower the threshold of galvanic stimulation and to make the electric stimulus better supported for the patient.
Petrone
D
D
Istituto Policattedra di Otorinolaringoiatria dell'Università di Bari.
De Benedittis
G
G
Cortese
M
M
D000328:Adult; D004558:Electric Stimulation / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D011187:Posture / Q000502:physiology*; D012684:Sensory Thresholds / Q000502:physiology; D014724:Vestibular Function Tests / Q000379:methods*; D014722:Vestibule, Labyrinth / Q000502:physiology*
Stabilometria e definizione di soglia galvanica di eccitamento vestibolare nei soggetti normali: richerche sperimentali.