[Impairment of Attention in Dementia].

Impairment of attention, especially complex attention, appears in the early stage of dementia. Complex attention is one of the six neurocognitive domains, which are disturbed in dementia. Impairment of complex attention promotes symptoms of dementia, difficulties in activities of daily living (ADLs), and disturbed communication in dementia due to Alzheimer disease, Lewy body disease, and cerebrovascular diseases. Despite its importance, research on "impairment of attention in dementia" is scarce. We look forward to future studies addressing this topic. In this article, we emphasized on providing care for ADL and communication for people with dementia, who have attention deficits.