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Related Experiment Videos

Executive dysfunction in early Alzheimer's disease

G Binetti1, E Magni, A Padovani

  • 1Alzheimer's Disease Unit, Istituto S Cuore Fatebenefratelli, Brescia, Italy.

Journal of Neurology, Neurosurgery, and Psychiatry
|January 1, 1996
PubMed
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Mild Alzheimer's disease (AD) patients may show early executive dysfunction, impacting other cognitive areas. This executive impairment in AD+ patients was not linked to disease severity or duration.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Alzheimer's disease (AD) is a progressive neurodegenerative disorder.
  • Executive functions are crucial for complex cognitive tasks.
  • The role of executive dysfunction in early-stage AD requires further investigation.

Purpose of the Study:

  • To assess executive functioning deficits in patients with probable mild Alzheimer's disease.
  • To determine the impact of executive dysfunction on other neuropsychological domains.
  • To explore the relationship between executive impairment and clinical/demographic factors in mild AD.

Main Methods:

  • Twenty-five patients with probable mild Alzheimer's disease were evaluated.
  • Executive function was assessed using the Wisconsin Card Sorting Test, release from proactive interference, verbal fluency, and Stroop tests.

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  • Patients were classified into those with (AD+) and without (AD-) executive deficits based on test performance.

    • Main Results:

    • Seven out of 25 patients (28%) exhibited executive dysfunction (AD+).
    • Executive dysfunction was defined as scoring below the cutoff in at least two executive function tests.
    • No significant differences were found in clinical assessments, demographics, or other cognitive functions between AD+ and AD- groups.

    Conclusions:

    • Executive dysfunction may represent an early feature in a subset of mild Alzheimer's disease patients.
    • Impairment in executive functions appears independent of disease severity, duration, or broader cognitive deficits.
    • These findings highlight the potential early involvement of frontal lobe functions in Alzheimer's disease progression.