The MAPP Room Memory Test: Examining Contextual Memory Using a Novel Computerized Test in Cognitively-Unimpaired...

Area of Science:

• Neuroscience
• Cognitive Psychology
• Genetics

Background:

• Contextual memory, crucial for recalling event details, is impaired in Alzheimer's disease (AD).
• Existing tests for contextual memory are insufficient, particularly for visuospatial aspects.
• Autosomal dominant AD mutations, like Presenilin-1 E280A, offer insights into early AD pathology.

Purpose of the Study:

• To develop and evaluate a novel computerized test, the MAPP Room Memory Test, for assessing visuospatial contextual memory.
• To investigate whether cognitively-unimpaired carriers of the Presenilin-1 E280A mutation exhibit deficits in contextual memory compared to non-carriers.

Main Methods:

• Development of the MAPP Room Memory Test, a computerized cognitive assessment.
• Participants identified previously presented target items within visual scenes.
• Comparison of performance between mutation carriers (n=15) and non-carriers (n=31) from autosomal dominant AD families.

Main Results:

• Mutation carriers demonstrated significantly poorer delayed room recognition compared to non-carriers.
• The MAPP Room Memory Test revealed subtle cognitive differences in at-risk individuals.
• Results suggest the test's sensitivity to early cognitive changes associated with AD risk.

Conclusions:

• The MAPP Room Memory Test shows promise in detecting early, subtle cognitive impairments related to Alzheimer's disease risk.
• Further research with larger cohorts and biomarkers is warranted to validate the test's utility in preclinical AD.
• This test could aid in identifying individuals at higher risk for AD, facilitating early intervention strategies.