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Interference Impacts Working Memory in Mild Cognitive Impairment

Sara Aurtenetxe1, Javier García-Pacios2, David Del Río3

  • 1Laboratory of Cognitive and Computational Neuroscience, Center for Biomedical Technology of Madrid (CBT), Universidad Complutense de Madrid and Universidad Politécnica de Madrid Madrid, Spain.

Frontiers in Neuroscience
|October 30, 2016
PubMed

Insights

Mild cognitive impairment (MCI) patients struggle with working memory (WM) due to interference. Interruption significantly impairs MCI performance, highlighting attentional control deficits in memory loss.

Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Mild cognitive impairment (MCI) is a precursor to Alzheimer's disease (AD).
  • Episodic memory loss and working memory (WM) deficits are common in MCI.
  • Interference negatively impacts WM by depleting attentional resources.

Purpose of the Study:

  • To investigate the impact of interference on working memory (WM) performance in individuals with MCI.
  • To explore the specific effects of distraction and interruption on WM in MCI.
  • To understand the relationship between attentional control and WM deficits in MCI.

Main Methods:

  • A delayed match-to-sample paradigm was employed.
  • Two interference conditions (distraction, interruption) and a control condition were used.
  • Participants included 20 individuals with MCI and 20 healthy older adults.

Main Results:

  • Individuals with MCI showed a disproportionately greater decline in WM performance under interference conditions compared to controls.
  • Interruption had a more pronounced negative effect on WM performance in the MCI group.
  • These results suggest difficulties in attentional control mechanisms contribute to WM forgetting in MCI.

Conclusions:

  • Interference, particularly interruption, significantly impairs working memory (WM) in individuals with mild cognitive impairment (MCI).
  • Attentional control deficits are strongly associated with memory-related impairments in MCI.
  • These findings offer insights into the mechanisms underlying WM forgetting in MCI and its link to Alzheimer's disease progression.
Keywords:
agingbehavioral researchinterferencemild cognitive impairmentworking memory

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