Attention deficit in Alzheimer's disease is not simulated by an anticholinergic/antihistaminergic drug and is distinct from deficits in healthy aging.

Abstract:

OBJECTIVE:To evaluate attention deficit in Alzheimer's disease (AD) and its relationship to attention deficits associated with aging and with medications altering alertness. METHODS:Ten patients with probable AD, 10 healthy old controls, and 15 young controls performed a covert orienting of spatial attention task. Young controls performed the task an additional time after ingestion of diphenhydramine 1 mg/kg. Reaction times were obtained following valid, neutral, and invalid cues. RESULTS:In all groups, the reaction times were shortest for the validly cued stimuli and longest for the invalidly cued stimuli. Additionally, the AD patients performed disproportionately worse following the invalid cue than did the control groups. Young controls given diphenhydramine had decreased subjective alertness, performed worse than they did before drug but better than the old controls or AD patients, and had no disproportionate impairment with the invalid cue. CONCLUSIONS:AD patients have disproportionate problems shifting spatial attention compared with age-matched controls. Impaired attentional performance in AD cannot be simulated in young subjects by ingestion of a combined antihistamine/anticholinergic agent at a dose sufficient to produce significant changes in alertness.

journal_name

Neurology

journal_title

Neurology

authors

Oken BS,Kishiyama SS,Kaye JA,Howieson DB

doi

10.1212/wnl.44.4.657

subject

Has Abstract

pub_date

1994-04-01 00:00:00

pages

657-62

issue

4

eissn

0028-3878

issn

1526-632X

journal_volume

44

pub_type

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