The authors emphasize significance for people caring for the elderly of the knowledge on the glymphatic system, discovered a few years ago They present the basic data about the contemporary possibilities of objective estimation of the function of this system. The authors postulate that it would be reasonable to search for clinical symptoms indicative for the impairment of function of glymphatic system in older people. They believe that it is possible to propose some candidatures of such symptoms on the basis of analysis of the content of interviews with elderly people suffering from ineffective sleep. They postulate also to review the known psychometric tests designed for sleep quality assessment. As results of these considerations they propose some possible indicative symptoms, however they emphasize that these propositions should be verified by neuroscientist, which can apply the contrastenhanced MRI.

Sleep disorders are common in the general population. People suffering from a variety of general, neurological, and mental disorders are in high risk group. Insomnia, which is the most often form of sleep disorder, can be the onset of depression. Symptoms accompanying various neurological disorders are often a consequence of underlying sleep disorders.Objective: Examining the correlation between sleep disorders and the reduction of cognitive abilities among older people. Methods:We gathered data from 56 respondents from the University of the Third Age, aged between 52 and 81. We also performed certain objective measurements, using Montreal Cognitive Assessment (MOCA), a test of working memory system and the measurements of "visuomotor" coordination.Results: Correlation has been found between the results from the proposed sleep quality scale and the outcome of MOCA as well as other measurements.