A REVIEW: Electrifying the motor engram: effects of tDCS on motor learning and control

…In this review, we summarize the effects of tDCS on neural activity and suggest a few key principles: 1) firing rates are
increased by anodal polarization and decreased by cathodal polarization, 2) anodal polarization strengthens newly formed associations, and 3) polarization modulates the memory of new/preferred firing patterns. With these principles in mind, we review the effects of tDCS on motor control, motor learning, and clinical applications…

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