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Related Experiment Videos

Basis functions for object-centered representations.

Sophie Deneve1, Alexandre Pouget

  • 1Gatsby Computational Neuroscience Unit, Alexandra House, 17 Queen Square, London WC1N 3AR, United Kingdom.

Neuron
|January 28, 2003
PubMed
Summary
This summary is machine-generated.

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This study explores how the brain represents object locations, proposing an alternative model using basis functions. This model explains neural data and a syndrome called object-centered hemineglect.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Computational Neuroscience

Background:

  • Object-centered representations encode subpart positions relative to an object's axes and origin.
  • Physiological and neuropsychological data in humans and monkeys support these representations.
  • Explicit object-centered representations may involve neurons with invariant response properties.

Purpose of the Study:

  • To investigate an alternative computational scheme for object-centered representation using basis functions.
  • To determine if this alternative scheme is consistent with existing single-cell data.
  • To explain the phenomenon of object-centered hemineglect.

Main Methods:

  • Modeling neural responses using basis functions with retinotopic receptive fields.

Related Experiment Videos

  • Modulating receptive fields by object orientation and task-related signals.
  • Analyzing the model's consistency with single-cell recordings and its ability to account for hemineglect.

    • Main Results:

    • The proposed basis function scheme is consistent with single-cell data.
    • This model is computationally efficient.
    • The model successfully accounts for object-centered hemineglect.

    Conclusions:

    • An alternative model using basis functions provides a viable explanation for object-centered representations in the brain.
    • This model integrates retinotopic information with object orientation and task demands.
    • The model offers a computational framework for understanding object-centered hemineglect.