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Anodal online transcranial direct current stimulation facilitates visual motion perceptual learning
Di Wu1,2, Pan Zhang3, Yifan Wang1
1Department of Medical Psychology, Air Force Medical University, Xi'an, China.
The European Journal of Neuroscience
|December 13, 2022
Summary
Anodal transcranial direct current stimulation (tDCS) enhances visual perceptual learning (VPL) when applied during training, not before. This finding offers a more efficient tDCS protocol for VPL applications.
Area of Science:
- Neuroscience
- Cognitive Science
- Ophthalmology
Background:
- Visual perceptual learning (VPL) shows clinical potential but requires lengthy training.
- Transcranial direct current stimulation (tDCS) may accelerate VPL, but results are inconsistent.
Purpose of the Study:
- To investigate the effect of anodal tDCS on VPL.
- To determine if the timing of anodal tDCS relative to training influences VPL.
Main Methods:
- Anodal tDCS applied online (during training) or offline (before training) over the left hMT+.
- Coherent motion discrimination task used for VPL training over five consecutive days.
- Sham tDCS served as a control condition.
Main Results:
- Anodal tDCS significantly enhanced VPL when applied online, but not offline.
- No significant differences in within-session or between-session improvement were observed across online, offline, and sham tDCS conditions.
Conclusions:
- Online application of anodal tDCS during training is a more effective strategy for enhancing VPL.
- Findings contribute to optimizing tDCS protocols for VPL and understanding its underlying mechanisms.
