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Visual space is compressed in prefrontal cortex before eye movements.

Marc Zirnsak1, Nicholas A Steinmetz2, Behrad Noudoost2

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Summary
This summary is machine-generated.

During eye movements, visual receptive fields (RFs) in the prefrontal cortex converge on the target, rather than predicting retinal displacement. This convergence influences visual perception and guides gaze control.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • Saccadic eye movements shift gaze, causing retinal image displacement.
  • Predictive remapping of visual receptive fields (RFs) is hypothesized to maintain visual stability.
  • Previous evidence for RF remapping primarily focused on postsaccadic locations.

Purpose of the Study:

  • To investigate the behavior of prefrontal neuronal RFs during saccade preparation.
  • To determine if RFs predict retinal displacements by remapping presaccadically.
  • To understand the neural mechanisms underlying visual stability during eye movements.

Main Methods:

  • Multi-electrode recordings in monkeys during fixation and saccade preparation.
  • Mapping visual RFs of prefrontal neurons before and after eye movements.
  • Analyzing RF shifts in retinocentric space and convergence towards saccadic targets.

Main Results:

  • Prefrontal RFs converged towards the saccadic target before movement onset, shifting up to 18 degrees.
  • RF convergence increased the proportion of RFs responding to target-region stimuli threefold.
  • Presaccadic stimuli were mislocalized towards the saccadic target, mirroring human perception.

Conclusions:

  • Visual RFs in the prefrontal cortex do not predict retinal displacement via remapping before saccades.
  • RF convergence reflects an overriding perception of target space during eye movement preparation.
  • This mechanism contributes to visual stability and gaze control during saccades.