[Visual Impairment and False Perceptions in Dementia with Lewy Bodies].

Visual impairment and visual hallucinations are diagnostic signposts of dementia with Lewy bodies (DLB). Visual impairment is easily explicable as a functional impairment that results from damage to the visual cortices, whereas there is currently no compelling explanations for the mechanisms of visual hallucinations and other false perceptions. Here, I review evidence regarding the phenomenology and mechanisms of false perceptions in DLB, and propose that false perceptions maybe behavioral consequence of aberrant cortical state caused by cholinergic insufficiency.