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Representing stimulus motion with waves in adaptive neural fields.

Sage Shaw1, Zachary P Kilpatrick2,3

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Neural fields model visual motion perception. Adaptive processes and synaptic depression generate traveling waves, explaining how stimuli create apparent motion perception.

Keywords:
Neural fieldSynaptic depressionTraveling wavesVisual object motion

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Area of Science:

  • Computational neuroscience
  • Neural dynamics

Background:

  • Traveling waves of neural activity are observed in cortical networks.
  • Their spatiotemporal structure provides insights into encoded information and physiological mechanisms.
  • Understanding stimulus-response relationships is crucial for modeling neural processes.

Purpose of the Study:

  • To investigate the stimulus-response relationships of traveling waves in adaptive neural fields.
  • To model visual motion processing using neural field equations.
  • To provide a mechanistic description of apparent visual motion perception.

Main Methods:

  • Utilized neural field equations to model cortical tissue as an excitable medium.
  • Incorporated adaptive processes and activity-dependent synaptic depression.
  • Employed perturbative analysis to derive a wave response function.

Main Results:

  • Demonstrated that weak stimuli can shift wave positions over time.
  • Characterized the entrainment of traveling waves to both persistent and intermittent visual stimuli.
  • Developed a theory and simulations consistent with the perception of apparent visual motion.

Conclusions:

  • Adaptive neural fields with synaptic depression can generate and control traveling waves.
  • The model successfully explains how different types of visual stimuli elicit the perception of motion.
  • This work offers a mechanistic framework for understanding visual motion processing in the brain.