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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Memory Research

Background:

  • Highly superior autobiographical memory (HSAM) presents a unique challenge to existing memory models.
  • The role of impaired forgetting in HSAM remains largely unexplored.

Purpose of the Study:

  • To investigate whether HSAM is associated with deficits in the ability to forget.
  • To examine the neural mechanisms underlying directed forgetting in individuals with HSAM.

Main Methods:

  • Utilized a directed forgetting paradigm with functional magnetic resonance imaging (fMRI).
  • Compared 12 individuals with HSAM and 30 healthy controls on memory recognition tasks.
  • Analyzed brain activity during initial stimulus encoding and active forgetting phases.

Main Results:

  • Behaviorally, both HSAM and control groups demonstrated similar directed forgetting effects.
  • HSAM individuals showed heightened frontoparietal activation during initial word encoding.
  • Increased midline region activity was observed in HSAM during the active forgetting period.

Conclusions:

  • HSAM individuals do not exhibit impaired forgetting behaviorally.
  • Enhanced neural resource recruitment in frontoparietal and midline regions may underlie compensatory forgetting mechanisms in HSAM.
  • Superior initial stimulus processing in HSAM necessitates additional neural effort for effective forgetting.