Start by asking the patient's family. One of the most important pieces of information is the duration of the disease and how quickly it has progressed. Rapid progression with the previous position requires good underlying cause potentially treatable. A family history should be carefully taken and the patient's medical history should beanalysed, for example, the patient had uncontrolled hypertension sion and a step-down course which would be characteristic of multi-infarct dementia? Learn about: • the patient's ability to interact with others, function at home or at work, and self-care should be evaluated. • Change in personality. • A specific drug and alcohol history should be obtained, and a history of head trauma. A mental status examination will be required complete. This should include the state of consciousness and assessmentof orientation tests, speech, shortand long-term memory, calculation and abstract reasoning. The patient's mood should be assessed as the main differential diagnosis of dementia isdepressionor pseudodementia. Physical examination is as described in answer 2.