Dementia in the elderly is one of the factors that most diminishes the quality of life, along with the comorbidities it entails, such as sleep disturbances. However, numerous studies point to a causal bidirectionality between these two factors. The aim of this study is to conduct a systematic review of the available databases on the relationship between sleep disturbances and dementia.María Mérida Raigón1. Reina Sofia University Hospital (Cordoba).