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Similarity in activity and laterality patterns in the angular gyrus during autobiographical memory retrieval and

Tamar Mizrahi1,2, Vadim Axelrod3

  • 1The Gonda Multidisciplinary Brain Research Center, Bar Ilan University, Ramat Gan, Israel.

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Summary

Self-referential processing, judging traits as self-related, shows neural similarity with autobiographical memory retrieval. This suggests the sense of self may partly explain left angular gyrus activation during memory recall.

Keywords:
Angular gyrusAutobiographical memoryEpisodic memoryFunctional MRILateral parietal cortexSelf-referential processing

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Long-term memory, crucial for cognition, involves the lateral parietal cortex and angular gyrus, especially in the left hemisphere, during retrieval.
  • Left-lateralized angular gyrus activation is also observed during self-referential processing, where individuals assess trait relevance to themselves.

Purpose of the Study:

  • To investigate the neural relationship between autobiographical memory retrieval and self-referential processing.
  • To determine if self-referential processing contributes to the activation patterns observed in autobiographical memory retrieval.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used in thirty participants across two experiments.
  • Experiment 1 focused on autobiographical memory retrieval, while Experiment 2 examined self-referential processing.
  • Spatial correlation analysis was employed to compare neural activity between the two experimental conditions.

Main Results:

  • A significant neural similarity was found between autobiographical memory retrieval and self-referential processing.
  • The findings indicate that self-referential processing may partially account for left angular gyrus activation during autobiographical memory recall.

Conclusions:

  • Self-referential processing appears to play a role in the neural mechanisms underlying autobiographical memory retrieval.
  • This supports the view that the sense of self is integral to long-term memory recollection, though the angular gyrus's role in episodic detail retrieval requires further investigation.