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Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
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Updated: Jan 23, 2026

Visualizing Visual Adaptation
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Towards Network-Based Neurofeedback of Visual Areas to Enhance Visual Perception.

Despina Zlatkova1,2, Stephan M Gerber3, Branislav Savic2

  • 1Division of Neurorehabilitation, Department of Clinical Neurosciences, University Hospital of Geneva, Av. de Beau-Séjour 26, Geneva, 1211, Switzerland.

Brain Topography
|January 22, 2026
PubMed
Summary
This summary is machine-generated.

This study shows that EEG-based neurofeedback targeting alpha-band connectivity in visual areas can enhance brain network communication. This approach improved the detection of low-contrast visual stimuli, particularly in male participants.

Keywords:
Alpha-bandEEGFunctional connectivityNeurofeedbackVisual perception

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Biomedical Engineering

Background:

  • Alpha-band brain network communication is crucial for visual processing.
  • Disruptions in this network are linked to visual deficits.
  • Targeting alpha-band connectivity offers a potential therapeutic avenue.

Purpose of the Study:

  • To develop and evaluate an EEG-based neurofeedback system.
  • To target alpha-band connectivity in visual cortical networks.
  • To determine if modulating this network enhances low-contrast visual stimulus detection.

Main Methods:

  • A randomized, active-controlled study involving 28 participants.
  • Real-time auditory neurofeedback to modulate global alpha-band connectivity.
  • Feedback targeted visual cortex (active group) or frontal cortex (control group).
  • Pre- and post-training assessments of connectivity, visual, and attentional performance.

Main Results:

  • 50% of the active group showed increased alpha-band connectivity in the visual cortex.
  • Connectivity decreased in control and non-responder groups.
  • Improvements in stimulus detection were noted, especially in male participants.
  • Effectiveness was influenced by baseline performance.

Conclusions:

  • Brief, network-based neurofeedback can effectively enhance alpha-band connectivity in visual areas.
  • This approach shows promise for improving visual processing.
  • Further research is needed to explore influencing factors and optimize interventions.