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Is coding a relevant metaphor for the brain?

Romain Brette1

  • 1Institut de la Vision, Université Pierre-and-Marie-Curie 06, Sorbonne Universités, INSERM, CNRS, 75012Paris, Franceromain.brette@inserm.frhttp://romainbrette.fr.

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The neural coding metaphor is misleading because neural codes have limited representational power and cannot build information from sensory-action relations. This metaphor fails to capture the brain's dynamic, distributed causal structure.

Keywords:
actioninformationneural codingperceptionsensorimotor

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Computational Neuroscience

Background:

  • The "neural coding" metaphor posits that neurons communicate world properties via spikes.
  • This metaphor is widely used in neuroscience research.

Purpose of the Study:

  • To critically evaluate the appropriateness and limitations of the neural coding metaphor.
  • To argue that the metaphor is inadequate for understanding brain function and cognition.

Main Methods:

  • Conceptual analysis of the neural coding metaphor.
  • Comparison of the metaphor's assumptions with the brain's actual causal structure and representational needs.

Main Results:

  • Neural codes have limited representational power, dependent on experimental context.
  • Neural codes cannot build information from sensory-action relations required for perception.
  • The metaphor inaccurately represents the brain's dynamic, distributed causal structure as a linear process.

Conclusions:

  • The neural coding metaphor is inappropriate and misleading.
  • It is incompatible with the brain's causal structure and cognitive representational requirements.
  • It cannot serve as a valid basis for theories of brain function.