Figure 1.

(A) Experimental design. Each of the three feedback training sessions consisted of two runs with continuous feedback (B) followed by one run with end-of-block feedback (EoBF; C). The feedback display, shown in (B) and (C), is updated every TR. The arrow indicates the regulation direction, which is linked to “UP”- or “DOWN”-regulation of the amygdala in a counter-balanced fashion. A simple bar without arrow head indicates a rest period. Regulation or rest periods were 12 TR ≊ 30 s in length (TR = 2.54 s). All runs began with a rest block followed by 8 blocks each of left regulation, right regulation, or rest. The dots mark the amygdala signal from the last 12 fMRI image acquisitions. The red dot represents the most recently acquired data, while the purple dots represent progressively older data.