The current study is an initial stage of a clinical trial on the use of EquiCue™ for patients with vestibular imbalance. The hypothesis is that EquiCue™ can at least partially substitute the lost vestibular function and therefore helps a vestibular patient to achieve better postural stability in daily activities. The basic questions regarding the technology are: 1) How to represent head movement using electrical pulses on the palate; 2) Whether the electrotactile presentation on the palate can be reliably recognized and used for balance control. The study also helps to understand the role of multisensory integration on balance, especially the impact of alternative sensory feedback on the balance system.