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Related Experiment Videos

Contextual interference in recognition memory with age.

Angela H Gutchess1, Andrew Hebrank, Bradley P Sutton

  • 1Beckman Institute, University of Illinois, Urbana-Champaign, IL, USA. gutchess@nmr.mgh.harvard.edu <gutchess@nmr.mgh.harvard.edu>

Neuroimage
|March 16, 2007
PubMed
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Elderly adults show memory difficulties with irrelevant contexts due to cognitive control network disruption. High-performing elderly may compensate using additional brain resources.

Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Human Aging Research

Background:

  • Behavioral studies indicate elderly adults' memory is sensitive to contextual information, with irrelevant contexts causing significant interference.
  • Understanding age-related changes in cognitive control networks is crucial for explaining memory performance variations in older adults.

Purpose of the Study:

  • To investigate age-related differences in brain activity during contextual information processing for recognition memory using event-related functional magnetic resonance imaging (fMRI).
  • To examine how task-irrelevant contexts impact memory performance and neural engagement in young and elderly adults.

Main Methods:

  • Event-related fMRI was employed with 21 young and 20 elderly adults who incidentally encoded object images in meaningful contexts.

Related Experiment Videos

  • Participants completed a recognition memory test with objects presented in identical or novel contexts.

    • Main Results:

    • Elderly adults exhibited higher false alarm rates than young adults when novel objects were in familiar, task-irrelevant contexts.
    • Reduced engagement of the bilateral dorsolateral prefrontal cortex and anterior cingulate was observed in elderly compared to young adults, indicating cognitive control network disruption.
    • This disruption was evident in both high and low-performing elderly individuals, suggesting pervasive age-related deficits.
    • High-performing elderly adults additionally recruited middle and medial frontal regions, unlike young adults and low-performing elderly.

    Conclusions:

    • Age-related disruption of the cognitive control network impairs the processing of contextual information in recognition memory.
    • Cognitive control deficits related to context processing appear widespread across elderly individuals.
    • High-performing elderly adults may employ compensatory strategies by recruiting additional frontal brain regions to mitigate these age-related cognitive control deficits.