sundowning

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English

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Etymology

From sundown +‎ -ing.

Noun

sundowning (uncountable)

  1. (medicine, psychology, psychiatry) A state of agitation, confusion, or delirium, especially in patients suffering from Alzheimer's disease, which begins daily at nightfall and which is alleviated by daylight.
    Synonyms: nocturnal delirium, sundowner syndrome
    • 1986, Norma Sullivan, Barry Fogel, “Could This Be Delirium?”, in The American Journal of Nursing, volume 86, number 12, page 1363:
      Impaired judgment and sundowning (increased confusion when orienting cues diminish at night) often makes it necessary to restrict and protect the delirious patient.
    • 2023 April, Abhijit Satpati, Thomas Neylan, Lea T. Grinberg, “Histaminergic neurotransmission in aging and Alzheimer's disease: A review of therapeutic opportunities and gaps”, in Alzheimer’s & Dementia: Translational Research & Clinical Interventions‎, volume 9, number 2, Wiley, →DOI, →ISSN:
      Polysomnography and othersleep measures show sleep fragmentation with shortening of N3 sleep togetherwith excessive daytime sleepiness (EDS) and sundowning as the main findings in AD patients.

Verb

sundowning

  1. present participle and gerund of sundown

See also

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