la respiration élémentaire du muscle" (Fatigue and elemental muscle respiration). Career France and Belgium For the next two years, Joteyko practiced medicine in Paris but found she disliked the routine. In 1898, she accepted an offer to move to Belgium, as an assistant at the Solvay Institute of Physiology. She also lectured on experimental psychology at the Casimir Laboratory of the New University of Brussels. In 1903, she became the director of the Casimir Laboratory and a protégée of . She published papers on physiology and her research into the effects of anesthesia by means of ether or chloroform on muscles, nerves, and the nervous system. Joteyko was particularly interested in muscle and central nervous system fatigue and increasingly worked on methods to quantitatively measure fatigue. Her scientific works were recognized with numerous honors, including a joint award in 1900 with Casimir Radzikowski for the Desmath Prize of the Imperial and Royal Academy of Brussels; a co-honor in 1901 with Stefanowska for the Dieudonnée Prize of the and with Victor Pachon for the Montyon Prize of the French Academy of Sciences; and in 1903 co-honors with Paul-Émile Garnier and for the Lallemand Prize of the French Academy of Sciences and the Monyton Prize with Stefanowska and Radzikowski. In 1904, Joteyko became president of the Belgian Neurological Society and chaired the organization's congress in Liège the following year. In 1906, Stefanowska left Paris and returned to Poland, becoming headmistress of a girl's secondary school. Joteyko strongly objected to her partner leaving, but Stefanowska was tired of research and wanted to return to teaching. She convinced Joteyko, whom she referred to as her towarzyszka życia (life companion), with the promise that they could write letters and visit each other. Though she continued to research physiology, Joteyko began lecturing on pedagogical psychology at teacher's seminars in Charleroi and Mons. In 1908, she founded and became editor of the Revue Psychologique, a journal which explored developments in the field of psychology from a scientific and educational perspective. Through her work there, she met and began collaborating with a young, Georgian scientist, Varia Kipiani, who served as a secretary to the Revue. The two women carried out joint research on vegetarianism, to which they both adhered and were awarded the 1908 Vernois Prize of the Académie Nationale de Médecine. Joteyko organized summer Paedological Seminars inviting international scholars to participate. Joteyko and Stefanowska published their last