[Supporting psychobehavioral disorders at home and in institutions: a systemic approach].

Caring for people with Alzheimer's disease and related disorders is a complex process, that of a chronic illness. Psychological and behavioral symptoms associated to dementia can appear in all neuro-degenerative diseases to varying degrees, and depend on numerous factors that need to be understood in order to take appropriate action. We propose a systemic approach to psychological and behavioral symptoms, with a view to preventing their onset or reducing their severity.