Signs and symptoms of dementia - He or she may forget details or even an entire event. For instance, he or she may not be able to recall having ate their dinner just a short while ago - He or she may lose the ability to make decisions and their sense of time and place - He or she may lose their way around familiar areas and neighbourhoods - He or she may encounter difficulties when undertaking simple tasks such as washing, eating and dressing - He or she may lose the a