Numerous developments have improved the safety and efficacy of electroconvulsive therapy (ECT) in recent years, so that ECT is now one of the safest forms of treatment under anesthesia. The indications for psychiatric patients are clearly defined. ECT is also under discussion with respect to certain neurological disorders. This discussion has, however, been largely ignored by the German medical profession. Critical evaluation of previous experience, especially in the United States and in Scandinavia, reveals some clinical situations (e.g., akinetic crisis in Parkinson's disease) in which a primary neurological indication for ECT might be present. ECT is frequently indicated in other brain diseases if pronounced psychopathological disturbances (especially of a depressive type) occur and fail to respond to conventional treatment with psychotropic drugs. ECT may then be indicated on a case-by-case basis. ECT should not be withheld from such patients; on the other hand, there is the risk of uncontrolled expansion of these indications for ECT.