Neuromodulation of Mind-Wandering in Depression

The specific aim of this proposed study is to investigate the feasibility and therapeutic potential of LIFUP in changing negative cognition in depression. Specifically, the investigators will study if modulating DMN activity can change maladaptive mind-wandering. The investigators hypothesize that DOWN-modulation of the posterior cingulate cortex (PCC), a key DMN node, will decrease DMN resting state functional connectivity, perfusion, and activation during a cognitive-affective task (description below). The investigators also hypothesize that DOWN-modulation of the PCC will be associated with decreased mind-wandering and increased mindfulness. Finally, the investigators hypothesize that the opposite will be true for UP-modulation of the PCC.