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Storage and processing working memory functions in Alzheimer-type dementia.

T. Vecchi1, V. Saveriano, L. Paciaroni

  • 1Istituto di Psicologia, Università di Pavia, Italy.

Behavioural Neurology
|September 25, 2001
PubMed
Summary
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Alzheimer's patients show significant working memory deficits, especially in tasks requiring active information manipulation. This highlights active processing as crucial for understanding cognitive decline in early Alzheimer's disease.

Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Working memory decline is linked to normal aging and Alzheimer's disease.
  • Understanding specific working memory processes (storage vs. manipulation) is key to interpreting cognitive limitations.

Purpose of the Study:

  • To investigate working memory deterioration in early Alzheimer's disease.
  • To compare active and passive information processing deficits in Alzheimer's patients versus healthy elderly controls.

Main Methods:

  • Adapted a procedure to assess verbal and visuo-spatial working memory.
  • Included tasks for both passive storage and active manipulation of information.
  • Matched early-stage Alzheimer's patients with a healthy elderly control group.

Main Results:

Related Experiment Videos

  • Alzheimer's patients performed worse than controls across all tasks.
  • The performance gap was largest for tasks involving active information manipulation.
  • Deficits in active processing were consistent across verbal and visuo-spatial materials.

Conclusions:

  • Active processing is a critical factor in cognitive decline during early Alzheimer's disease.
  • The degree of active manipulation significantly impacts working memory performance in Alzheimer's patients.