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False recognition in Lewy-body disease and frontotemporal dementia

C de Boysson1, S Belleville, N A Phillips

  • 1Université de Montréal, Montréal, Canada.

Brain and Cognition
|November 25, 2010
PubMed

Insights

Frontotemporal dementia (FTD) and Lewy-body disease (LBD) patients exhibit reduced false recognition. This memory phenomenon was less pronounced in Lewy-body disease than frontotemporal dementia patients.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • False recognition, a cognitive phenomenon, is increasingly studied in neurodegenerative diseases.
  • Frontotemporal dementia (FTD) and Lewy-body disease (LBD) are distinct neurodegenerative conditions impacting cognition differently.

Purpose of the Study:

  • To investigate and compare the false recognition phenomenon in individuals with FTD and LBD.
  • To explore the relationship between false recognition deficits and specific cognitive impairments in these patient groups.

Main Methods:

  • Utilized the Deese-Roediger-McDermott (DRM) paradigm to elicit false recognition.
  • Assessed recognition levels in patients with LBD (n=10) and FTD (n=15), alongside 30 healthy controls.
  • Administered neuropsychological tests to evaluate cognitive functions, including inhibition and verbal memory.

Main Results:

  • Both FTD and LBD patient groups demonstrated a reduced level of false recognition compared to controls.
  • The reduction in false recognition was significantly greater in patients with LBD than in those with FTD.
  • Correlations revealed that reduced false recognition in LBD was linked to inhibition deficits, while in FTD, it was associated with both inhibition deficits and verbal memory impairments.

Conclusions:

  • Cognitive components such as inhibition and verbal memory play a crucial role in the false recognition effect.
  • Findings support existing models of memory and cognitive function in neurodegenerative diseases.
  • The study highlights differential impacts of FTD and LBD on memory processes, particularly false recognition.

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