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Hierarchical process memory: memory as an integral component of information processing.

Uri Hasson1, Janice Chen1, Christopher J Honey2

  • 1Department of Psychology and the Neuroscience Institute, Princeton University, NJ 08544-1010, USA.

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Working memory models often overlook continuous information use. This study reveals that brain circuits accumulate information hierarchically across various timescales, suggesting memory is integral to ongoing neural processing.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Computational Neuroscience

Background:

  • Traditional working memory (WM) models emphasize discrete encoding and retrieval events.
  • Real-world cognition involves continuous integration of past information with incoming data across diverse timescales.

Purpose of the Study:

  • To propose a hierarchical systems perspective on information accumulation in cortical circuits.
  • To challenge localized storage views of memory in favor of intrinsic processing roles.

Main Methods:

  • Analysis of single-unit recordings.
  • Review of electrocorticography (ECoG) data.
  • Synthesis of functional imaging studies (e.g., fMRI).

Main Results:

  • Evidence suggests widespread cortical circuits possess information accumulation capabilities.
  • A hierarchy of accumulation timescales exists, from rapid sensory processing (milliseconds) to prolonged cognitive functions (seconds to minutes).

Conclusions:

  • Memory is not confined to specific brain regions but is an emergent property of neural processing across multiple timescales.
  • This hierarchical accumulation framework offers a more comprehensive view of how the brain utilizes past information for continuous cognition.