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Updated: Jul 17, 2026

Motor Imagery Brain-Computer Interface in Rehabilitation of Upper Limb Motor Dysfunction After Stroke
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Motor Imagery Brain-Computer Interface in Rehabilitation of Upper Limb Motor Dysfunction After Stroke

Published on: September 1, 2023

Improved visual perception through visuomotor-coupled brain stimulation.

Stefano Giannoni-Luza1, Sofia Osimo2, Silvio Ionta1

  • 1SensoriMotorLab, Jules Gonin Eye Hospital/Fondation Asile des Aveugles, Department of Ophthalmology/University of Lausanne, Lausanne, Switzerland.

Neuroimage
|July 15, 2026
PubMed
Summary

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Oscillatory transcranial direct current stimulation (otDCS) combined with visuomotor activity significantly enhances visual detection performance. This non-invasive brain stimulation method shows promise for improving vision, especially in the peripheral visual field.

Area of Science:

  • Neuroscience
  • Visual Perception
  • Brain Stimulation

Background:

  • Non-invasive brain stimulation (NIBS) investigates brain region function and task performance.
  • Previous NIBS studies on visual cortex yielded mixed results, potentially due to varied protocols and overlooking visuomotor activity's influence.

Purpose of the Study:

  • To determine which specific NIBS protocol, when coupled with visuomotor activity, most effectively enhances visual perception.
  • To investigate the impact of different excitatory, high-definition NIBS methods on visual detection.

Main Methods:

  • Eighty-four participants received one of three visuomotor-coupled NIBS protocols (tDCS, otDCS, tRNS) or sham stimulation over four days.
  • Visual detection accuracy was measured daily using stimuli presented during a virtual reality visuomotor task.
Keywords:
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Last Updated: Jul 17, 2026

Motor Imagery Brain-Computer Interface in Rehabilitation of Upper Limb Motor Dysfunction After Stroke
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  • NIBS was delivered to the visual cortex.

    • Main Results:

    • Oscillatory transcranial direct current stimulation (otDCS) significantly improved visual detection compared to sham, tDCS, and tRNS.
    • The enhancement in visual detection emerged after the first session and increased with subsequent sessions.
    • The positive effects of otDCS were more pronounced for stimuli in the peripheral visual field.

    Conclusions:

    • Visuomotor-coupled otDCS is a promising non-invasive brain stimulation technique for enhancing visual detection.
    • This method shows particular efficacy in improving peripheral visual field detection.
    • Future research can explore otDCS for visual rehabilitation or enhancement.