[Idiopathic orthostatic hypotension].

The disease picture of idiopathic orthostatic hypotonia is described from a clinical and histological point of view with reference to a case treated by the present authors. The independent character of this particular ailment may be considered as resulting from the virtually uncontrollable orthostatic decreases in blood pressure in connection with the progressive disorders especially of the motor system. Also, the etiology is not yet fully understood.