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Visually stressful striped patterns alter human visual cortical functional connectivity.

Jie Huang1, David C Zhu1,2

  • 1Department of Radiology, Michigan State University, East Lansing, Michigan.

Human Brain Mapping
|August 1, 2017
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Summary
This summary is machine-generated.

Visually stressful patterns alter brain connectivity, enhancing connections within the visual system and to other regions. These changes persist, suggesting potential for visual neuromodulation therapies for conditions like migraine and epilepsy.

Keywords:
functional connectivityhuman brainresting-state fMRIvisual cortexvisual neuromodulation

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Area of Science:

  • Neuroscience
  • Visual Perception
  • Brain Imaging

Background:

  • Visually stressful striped patterns (around 3 cycles per degree) can cause perceptual distortions, discomfort, and trigger neurological conditions like migraine and photosensitive epilepsy.
  • While visual cortical activation by these patterns is known, their impact on the broader visual cortical network remains unexplored.

Purpose of the Study:

  • To investigate the effects of prolonged visual stimulation with stressful and non-stressful striped patterns on functional brain connectivity.
  • To determine if observed changes in connectivity persist after stimulation and if they differ between stressful and non-stressful patterns.

Main Methods:

  • Utilized resting-state functional magnetic resonance imaging (fMRI) to assess brain connectivity.
  • Compared functional connectivity patterns following stimulation with visually stressful (∼3 cpd) and non-stressful (∼0.3 cpd) striped patterns.

Main Results:

  • Visually stressful stimulation significantly enhanced functional connections within the visual system.
  • Functional connectivity between the primary visual cortex (V1) and other brain regions was significantly modified by stressful patterns.
  • Non-stressful stimulation did not produce significant changes in functional connectivity.
  • Observed alterations in connectivity persisted beyond the stimulation period, affecting both intra- and extra-visual cortical networks.

Conclusions:

  • Prolonged exposure to visually stressful patterns can induce lasting changes in brain functional connectivity.
  • These persistent alterations suggest that visual neuromodulation using stressful patterns may offer a novel therapeutic approach for visually triggered neurological disorders.