Using Combined EEG and Non-invasive Brain Stimulation to Examine and Improve Reward Functioning in Opioid Use Disorder

The primary aims of this study are to identify impaired cognitive control in opioid use disorder (OUD) and subsequently to examine the effects of transcranial magnetic stimulation (TMS) on reward processing, as measured by the reward positivity (an electrophysiological signal) in people with OUD. To this end, the investigators will adopt a randomized sham-controlled trial to evaluate the efficacy of Ri-TMS on cognitive control in OUD. The investigators hypothesize that Ri-TMS will be successful in modulating the reward positivity in opioid users in the active TMS condition.