Dizziness is dangerous sign. The proofs are presented that it is always related to vestibular disorder, even if it is of visual origin. Vestibular system does not resemble any other type of analyser. It has six peripheral sensors: gravitation, movement, acoustic, vibration, magnetic impulse and metabolism. Being sensory system it has at the same time integrative function. Together with hearing, vision and proprioception it provide space orientation and interaction. Vestibular cortical projection has four representations: in vestibular, somatosensory, visual and acoustic cortical areas. It has...