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Transcranial Direct Current Stimulation to Modulate Fmri Drug Cue Reactivity in Methamphetamine Users: A Randomized Clinical Trial Publisher Pubmed



Ekhtiari H1 ; Soleimani G2, 3 ; Kuplicki R1 ; Yeh HW4 ; Cha YH5 ; Paulus M1
Authors
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Authors Affiliations
  1. 1. Laureate Institute for Brain Research, Tulsa, OK, United States
  2. 2. Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
  3. 3. Iranian National Center for Addiction Studies, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. UMKC School of Medicine, University of Missouri-Kansas City School of Medicine, Kansa City, MO, United States
  5. 5. Department of Psychiatry, Medical school, University of Minnesota, Minneapolis, MN, United States

Source: Human Brain Mapping Published:2022


Abstract

Transcranial direct current stimulation (tDCS) has been studied as a therapeutic option to alter maladaptive brain functions associated with chronic substance use. We present a randomized, triple-blind, sham-controlled, clinical trial to determine the neural substrates of tDCS effects on drug craving. Sixty participants with methamphetamine use disorder were assigned to two groups: active tDCS (5 x 7 cm2, 2 mA, 20 min, anode/cathode over the F4/Fp1) and sham stimulation. Neuroimaging data of a methamphetamine cue reactivity task were collected immediately before and after stimulation. There was a significant reduction in self-reported craving after stimulation without any significant effect of time-by-group interaction. Our whole-brain analysis demonstrated that there was a global decrease in brain reactivity to cues following sham but not active tDCS. There were significant time-by-group interactions in five main clusters in middle and inferior frontal gyri, anterior insula, inferior parietal lobule, and precuneus with higher activations after active stimulation. There was a significant effect of stimulation type in the relationship between electrical current at the individual level and changes in task-modulated activation. Brain regions with the highest electric current in the prefrontal cortex showed a significant time-by-group interaction in task-modulated connectivity in the frontoparietal network. In this trial, there was no significant effect of the one session of active-F4/Fp1 tDCS on drug craving self-report compared to sham stimulation. However, activation and connectivity differences induced by active compared to sham stimulation suggested some potential mechanisms of tDCS to modulate neural response to drug cues. © 2022 The Authors. Human Brain Mapping published by Wiley Periodicals LLC.
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