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Three creatures named 'forward model'.

A Karniel1

  • 1Department of Physiology, Northwestern University Medical School, Chicago, IL 60611-3008, USA. karniel@northwestern.edu

Neural Networks : the Official Journal of the International Neural Network Society
|July 20, 2002
PubMed
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The nervous system may use forward models for motor control. This commentary distinguishes three distinct structures—output predictor, state estimator, and distal teacher—that support this hypothesis, clarifying potential misinterpretations.

Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Motor Control

Background:

  • The nervous system's role in motor control is increasingly linked to the concept of forward models.
  • Evidence supporting the forward model hypothesis stems from both theoretical frameworks and experimental findings.

Purpose of the Study:

  • To differentiate between three specific computational structures proposed to underpin the forward model hypothesis in motor control: output predictors, state estimators, and distal teachers.
  • To clarify the distinct roles and evidence associated with each structure.

Main Methods:

  • Conceptual analysis and theoretical distinction of computational structures.
  • Review of existing theoretical and experimental evidence related to motor control models.

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Main Results:

  • Identified three distinct structures supporting the forward model hypothesis: output predictor, state estimator, and distal teacher.
  • Highlighted the potential for misinterpretation of evidence across these structures due to the general use of the term 'forward model'.

Conclusions:

  • The nervous system might utilize a combination of these structures for effective motor control.
  • Clarifying these distinctions is crucial to avoid misattributing evidence and to advance our understanding of neural control mechanisms.