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Thomas Parr1, M Berk Mirza2, Hayriye Cagnan3,4

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Summary
This summary is machine-generated.

The brain actively constructs visual perception using an internal model and eye movements. Researchers found that connections between dorsal and ventral attention networks change during visual scene exploration.

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active visionattentiondynamic causal modellingeye-trackingmagnetoencephalographyvisual neglect

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Computational Neuroscience

Background:

  • Active perception theories propose the brain uses generative models to interpret sensory input.
  • Visual perception is actively constructed through sequences of eye movements (saccades).
  • Oculomotor control involves dorsal and ventral frontoparietal attention networks.

Purpose of the Study:

  • To test if coupling between dorsal frontal cortex and right temporoparietal cortex is modulated during visual scene interrogation.
  • To investigate changes in effective connectivity within attention networks during active vision.

Main Methods:

  • Magnetoencephalography (MEG) and eye-tracking were used in human participants.
  • Dynamic causal modeling (DCM) assessed effective connectivity changes.
  • Models with and without connectivity modulation were compared.

Main Results:

  • Strong evidence for modulation of connections between dorsal and ventral attention networks.
  • A disinhibition of the ventral attention network by the dorsal network was observed.
  • Changes in effective connectivity were consistent with active vision computational models.

Conclusions:

  • The study provides empirical support for active vision theories.
  • Neuronal connections between attention networks dynamically adjust during visual exploration.
  • This modulation may reflect the brain updating beliefs about visual information based on new data.