[Fatigue and its disturbances: conditions of possibility and the rise and fall of twentieth-century neurasthenia].

The article first analyzes some of the social and historical components underlying the conditions ofpossibility that allowed neurasthenia to emerge as a nosological category in the latter half of the nineteenth century and then explores the elements that influenced its demise in medical and lay circles. It offers a brief introduction to this medical category and a more detailed discussion of some supporting debates, including the idea of nervous exhaustion, twentieth-century studies and concerns on fatigue, and the malady's presumed somatogenesis. The concluding analysis of how the category met its demise highlights elements that altered its status and its diagnostic usefulness.