In a certain sense I nevertheless remained faithful to the line of work upon which I had originally started. The subject which Brücke had proposed for my investigations had been the spinal cord of one of the lowest of the fishes (Ammocoetes Petromyzon); and I now passed on to the human central nervous system. Just at this time Flechsig’s discoveries of the non-simultaneity of the formation of the medullary sheaths were throwing a revealing light upon the intricate course of its tracts. The fact that I began by choosing the medulla oblongata as the one and only subject of my work was another sign of the continuity of my development. In complete contrast to the diffuse character of my studies during my earlier years at the University, I was now developing an inclination to concentrate my work exclusively upon a single subject or problem. This inclination has persisted and has since led to my being accused of one-sidedness. I now became as active a worker in the Institute of Cerebral Anatomy as I had previously been in the physiological one. Some short papers upon the course of the tracts and the nuclear origins in the medulla oblongata date from these hospital years, and my results were regularly noted down by Edinger. One day Meynert, who had given me access to the laboratory even during the times when I was not actually working under him, proposed that I should definitely devote myself to the anatomy of the brain, and promised to hand over his lecturing work to me, as he felt he was too old to manage the newer methods. This I declined, in alarm at the magnitude of the task; it is possible, too, that I had guessed already that this great man was by no means kindly disposed towards me. From the practical point of view, brain anatomy was certainly no better than physiology, and, with an eye to material considerations, I began to study nervous diseases. There were, at that time, few specialists in that branch of medicine in Vienna, the material for its study was distributed over a number of different departments of the hospital, there was no satisfactory opportunity of learning the subject, and one was forced to be one’s own teacher. Even Nothnagel, who had been appointed a short time before, on account of his book upon cerebral localization, did not single out neuropathology from among the other subdivisions of medicine. In the distance glimmered the great name of Charcot; so I formed a plan of first obtaining an appointment as Lecturer on Nervous Diseases in Vienna and of then going to Paris to continue my studies.