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Related Experiment Video

Updated: Aug 19, 2025

Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
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Recollection and prior knowledge recruit the left angular gyrus during recognition.

Buddhika Bellana1,2,3, Natalia Ladyka-Wojcik4, Shany Lahan5

  • 1Department of Psychology, York University, Glendon Campus, Toronto, Canada. bbellana@yorku.ca.

Brain Structure & Function
|November 28, 2022
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Summary
This summary is machine-generated.

The human angular gyrus (AG) is crucial for memory retrieval. This study shows the left AG processes both specific episode recall and general knowledge, expanding its known mnemonic functions.

Keywords:
Default mode networkEpisodic memoryParietalSemantic memoryfMRI

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Psychology

Background:

  • The human angular gyrus (AG) is linked to memory recollection and general mnemonic representations.
  • Existing research presents separate views on AG function in memory.

Purpose of the Study:

  • To reconcile differing views of AG function by investigating its role in both specific recollection and general prior knowledge access.
  • To determine if AG activity is modulated by task-specific recollection and general prior knowledge within individuals.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed.
  • A Remember-Know paradigm was used with famous and non-famous faces.
  • The study examined brain activity in relation to recollection and prior knowledge.

Main Results:

  • Increased BOLD activity in the left AG occurred during recollection without prior knowledge.
  • The left AG showed heightened activity when accessing prior knowledge without specific recollection.
  • Left AG responses during recollection were influenced by encoding duration and prior knowledge.

Conclusions:

  • The left AG is sensitive to both specific episodic recollection and incidental access of general prior knowledge.
  • These findings broaden the understanding of mnemonic representations processed by the AG.
  • The study highlights the dual role of the left AG in memory processing.