Figure 6

Experiment design: Data were collected from 2 sessions: ‘Active’ and ‘Sham’.

The order of the sessions was counterbalanced across subjects for head experiment. Each session consisted of 6 currents applied in pseudorandom order with 7 interleaving 0 mA currents. Field maps were acquired for each applied current. An additional ‘–Active’ session was included for the Phantom experiment, wherein the polarity of the applied currents was reversed (compared to ‘Active’).