This article tries to establish the possible associations, on the level of discourse, between psychiatry and geriatrics. For this purpose we revised the debate on mental health and old age, respectively, trying to apply the idea of social buildups. We made a parallel between gerontology and mental health within two aspects: their reaction to a previous hegemonically medical order in presenting psychiatric and geriatrics and the way medical knowledge has been later questioned, by offering a discourse based on interdisciplinary expression. We used Debert as a basic text in the discussion on old age wherein it classified "third age" and the consequences of the invention of its category in transformations in the field of gerontology, of an interdisciplinary nature.
Psychiatry; geriatrics; gerontology; mental health; epistemology