Nowadays, otologists mostly consider electronystagmography as an indispensable diagnostic procedure for a complete oto-neurological examination. However, this method is not yet used very often by practitioners, the price of the outfit being prohibitive for a private medical office. The introduction of Greiner’s torsion swing test has entirely changed the situation, however: this has made available a relatively inexpensive apparatus, and the method is sufficiently well standardized to be successfully performed by practitioners. The author presents a number of graphs obtained by the method of Greiner; he shows a case of vestibular recruitment, a central type outline after cranio-cerebral trauma and a flat graph in a case of disseminated sclerosis. The author is pointing out that in certain cases of central disturbances, the patient is unable to follow the oscillations of the pendulu