[Current status of normocalcemic tetany].

The author describes the actual state of research of normocalcemic tetany. Since 1959 the infusion test with ethylene diamine tetraacetic acid (EDTA) has won a central position. The EDTA test gives the possibility to classify tetanic symptoms into the circle either of hypocalcaemic or normocalcaemic syndrome. In the latter case the functional disturbance is to be treated in a form of combined therapy by tranquilizers and psychosomatic measures.