Impairment can range Impairment can range What is mild cognitive impairment (MCI)? declínio cognitivo cognitive decline mild cognitive impairment doença de Alzheimer e vários tipos de demência 5-20 percent mild cognitive impairment mild cognitive impairment mild cognitive impairment Dementia mild cognitive impairment (MCI) What is mild cognitive impairment (MCI)? mild cognitive impairment cognitive decline mild cognitive impairment mild cognitive impairment