The body-sway responses obtained by anodal unipolar and anodal double galvanic stimulation at 0.8 mA for 10 see. were studied in 40 normal subjects and cases with vestibular lesions, such as Meniere's disease, vestibular neuritis, deafmutism and cerebellopontine angle tumour. The results obtained were processed and analyzed by a medical data processing computer. The body-sway responses in normal subjects were divided into three groups. From the body-sway responses in patients it is possible to differentiate the labyrinthine lesions from the retrolabyrinthine disturbances by means of our galvanic stimulation technique.