Figure 3. M1 a-tDCS during Adaptation enhanced prism after-effect retention across days.

Pointing errors in healthy volunteers (N = 10) when anodal (red) or sham (blue) stimulation was applied during Adaptation (Experiment 6). Compared to the experiment of Figure 2A, there was no active washout phase. Instead, retention was measured daily over 5 days after adaptation. Solid lines show pointing accuracy averaged across participants (±1 SEM, shading). As in the experiment shown in Figure 2A, the AE persisted throughout the measured retention period only when M1 a-tDCS had been applied during Adaptation. Asterisks indicate significantly larger AEs in the anodal versus sham condition throughout Retention (p<0.05).

Figure 3—figure supplement 1. M1 stimulation-enhanced retention persists across days.

Figure shows group mean open-loop pointing errors (±1 SEM) over 4 days prior to prism adaptation (baseline), and 4 days after PA +sham tDCS (blue) or anodal tDCS (red). Pointing is significantly left-shifted in the 4 days after M1 anodal tDCS compared to both the sham and baseline conditions. Asterisk reflects p<0.05.