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A First Principles Approach to Subjective Experience.

Brian Key1, Oressia Zalucki1, Deborah J Brown2

  • 1School of Biomedical Sciences, University of Queensland, Brisbane, QLD, Australia.

Frontiers in Systems Neuroscience
|March 7, 2022
PubMed
Summary
This summary is machine-generated.

Subjective experience relies on specific neural computations. This study defines a minimal neural architecture, the hierarchical forward models algorithm, necessary for consciousness, proposing animals lacking it cannot be conscious.

Keywords:
awarenessfeelingsphenomenal consciousnessqualiasentience

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Philosophy of Mind

Background:

  • Understanding consciousness is a major scientific challenge.
  • Higher-order theories often overlook specific neural computations.
  • Current approaches may not adequately assess non-human animal consciousness.

Purpose of the Study:

  • To identify neural computations essential for subjective experience.
  • To define the minimal neural architecture required for consciousness.
  • To provide a framework for assessing consciousness across species.

Main Methods:

  • Utilizing the principles that subjective experience depends on complex neural functions and structure determines function.
  • Reasoning that subjective experience necessitates a neural architecture of stacked forward models.
  • Defining a minimal architecture based on prediction, error detection, and feedback control.

Main Results:

  • A minimal neural architecture, termed the hierarchical forward models algorithm, is defined.
  • This architecture involves stacked forward models for predictive processing.
  • The framework outlines necessary, though not sufficient, components for subjective experience.

Conclusions:

  • Subjective experience is contingent upon a specific neural architecture.
  • The hierarchical forward models algorithm provides a testable framework for consciousness.
  • Animals lacking this architecture are postulated to be incapable of subjective experience.