The three expressions of the clinical syndrome of dementia have been well documented: cognitive deficits—amnesia, aphasia, apraxia, and agnosia; neuropsychiatric features—a heterogeneous array of psychiatric symptoms and behavioural disturbances such as depression, delusions, hallucinations, misidentifications, aggression, agitation, wandering, collectively described as neuropsychiatric features, behavioural and psychological symptoms of dementia (BPSD),1 or non-cognitive features2; and problems withactivities of daily living. The history of interest in the neuropsychiatry of dementia is relatively short by comparison with research into cognitive dysfunction. Psychiatric symptomatology …