It can manifest in many different ways, but the most common symptoms are difficulty keeping several things in mind at once, difficulty with mental arithmetic, and becoming more passive. Hallucinations, usually benign visual illusions, may occur. Mild ‘cognitive’ symptoms like these – that is, those relating to memory and thinking – are very common. It is referred to as ‘dementia’ if the symptoms affect a person’s ability to carry out everyday tasks, such as paying bills, shopping, and so on. /Dag Nyholm
