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An Isolated Retinal Preparation to Record Light Response from Genetically Labeled Retinal Ganglion Cells
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Encoding surprise by retinal ganglion cells.

Danica Despotović1, Corentin Joffrois1, Olivier Marre1

  • 1Institut de la Vision, INSERM, CNRS, Sorbonne Université, Paris, France.

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Summary
This summary is machine-generated.

Early retinal neurons encode stimulus surprise, not just unexpected events. This study shows retinal ganglion cells (RGCs) adjust responses based on prior expectations and stimulus history, supporting efficient coding.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Sensory Coding

Background:

  • The efficient coding hypothesis predicts neurons maximize information transmission under constraints.
  • Neurons are hypothesized to prioritize encoding surprising stimuli.
  • Previous studies indicated retinal ganglion cells (RGCs) exhibit 'omitted stimulus responses' to rare events.

Purpose of the Study:

  • To investigate if RGC responses vary gradedly with stimulus surprise.
  • To determine if RGCs encode surprise relative to internal expectations.
  • To test a normative model of surprise encoding in the retina.

Main Methods:

  • Presented retinal neurons with stochastic flash sequences.
  • Quantified stimulus surprise analytically based on flash/silence history.
  • Developed and applied a normative model to RGC responses.

Main Results:

  • RGC responses were well-explained by a model combining prior expectations and stimulus history.
  • The model accurately predicted how RGCs encode graded surprise.
  • Neural response diversity was attributed to differing prior expectations among RGCs.

Conclusions:

  • Retinal ganglion cells encode stimulus surprise relative to internally generated expectations.
  • This suggests surprise encoding is present even in early visual processing.
  • Findings support the efficient coding hypothesis in the retina.