抄録
Galvanic Vestibular Stimulation (GVS) can present left/right, front/back and left/right yaw acceleration sensation. It is known that the acceleration is produced towards anode from cathode. However, presenting superior-inferior directional acceleration sensation is not reported. It seems that current path in the head is not well understood and that gravity acceleration masks the perception of weak acceleration sensation even though it evoked superior-inferior acceleration within the GVS safety guideline. Therefore, we invented the stimulation method that can make subjects feel inferior-superior acceleration sensation within the safety guideline by applying inferior-superior direction countercurrent that can present strong inferior-superior directional acceleration sensation passing through the holes of temporal bone. The effects of inferior-posterior directional countercurrent were investigated by measuring subjective acceleration perception and body sway.
