Figure 1.

A. Timing of procedures and stimulation sessions. Six of the participants received four sessions of stimulation. DW = diffusion-weighted, RS = resting-state. Time between sessions: ▲ = 0 – 36 hours, * = 24 hours, # = 7–14 days. B. Memory tasks. Episodic memory task: Participants encoded face-word pairs during the training block and were asked to recall the paired word when shown the faces at testing. Procedural memory task: Participants were shown 14 arrangements of four cards and learned the probabilistic relationship between the cards and two possible outcomes through feedback. During testing, participants were tested on their ability to produce the optimal response for each arrangement.