Medical Dictionary
sundowning
play
noun
sun·down·ing
\ˈsən-ˌdau̇n-iŋ\
Medical Definition of sundowning
: a state of increased agitation, confusion, disorientation, and anxiety that typically occurs in the late afternoon or evening in some individuals affected with dementia Sundowning is a major problem in the middle and late stages of disorders, such as Alzheimer's disease, that cause dementia.—Patricia N. Prinz et al., The New England Journal of Medicine, 23 Aug. 1990
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