The American Academy of Neurology (AAN) periodically releases Practice Parameters -- extensively referenced, evidence-based reviews that give 4 levels of recommendations, from standards to advisories. Three recent Practice Parameters deal with dementia, revising the 1994 Practice Parameter for the Diagnosis of Dementia (see Neurology 1994; 44:2203) and providing new parameters for management of dementia and for early detection of dementia (mild cognitive impairment)