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Related Experiment Videos

Heading representations in primates are compressed by saccades.

Frank Bremmer1, Jan Churan2, Markus Lappe3

  • 1Department of Neurophysics & Marburg Center for Mind, Brain and Behavior - MCMBB, Philipps-Universität Marburg, Karl-von-Frisch Straße 8a, 35043, Marburg, Germany. frank.bremmer@physik.uni-marburg.de.

Nature Communications
|October 15, 2017
PubMed
Summary
This summary is machine-generated.

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Decoding neural activity during eye movements revealed a new visual illusion. This finding shows how brain signals during fast eye movements (saccades) can be misinterpreted, affecting our perception of self-motion.

Area of Science:

  • Neuroscience
  • Visual Perception
  • Computational Neuroscience

Background:

  • Perceptual illusions offer insights into neural signal decoding.
  • The medial superior temporal (MST) and ventral intraparietal (VIP) areas in primates are crucial for processing self-motion and heading direction.

Purpose of the Study:

  • To investigate if decoding neural activity during eye movements can predict human perceptual illusions.
  • To identify the neural basis of a newly discovered visual illusion related to heading perception during saccades.

Main Methods:

  • Recorded neural activity from monkey MST and VIP areas during self-motion stimuli and eye movements.
  • Developed a heading decoder to analyze neural signals during both slow and fast eye movements (saccades).
  • Conducted a behavioral experiment in humans to test perceived heading during saccades.

Related Experiment Videos

Main Results:

  • The heading decoder accurately represented heading during slow eye movements.
  • During fast eye movements (saccades), the decoder erroneously reported heading compression towards straight ahead.
  • Human participants exhibited a perceptual illusion where perceived heading compressed towards the direction of gaze during saccades.

Conclusions:

  • Neural decoding errors during saccades in monkeys predict a novel perisaccadic visual illusion in humans.
  • Primate areas MST and VIP are likely the neural substrates for this newly identified visual illusion.
  • This study highlights the interplay between eye movements, neural decoding, and visual perception.