Table 5

Summary of stimulation protocols details, treatment strategies and associated therapies

StudyIntensityDurationCoil/electrode positiontDCS referenceSham procedurePsychological interventionTreatment strategyMedication
De Lima et al.86 (2019)2 mA
Electrode size 5 × 7
20 minF3FP230 sNot allowedMonotherapyStable doses
Deppermann et al.115 (2014)15 Hz
80% rMT
3 min; 18 trains of 2 sF390° from skullPsychoeducation, 3 group sessionsMonotherapyStable doses for 3 wk
Diefenbach et al.116 (2016)1 Hz
90% rMT
15 min; 900 pulses per sessionIndividual structural MRI: x, y, z = 42, 36, 32 (MNI)Sham coilNot allowedMonotherapyStable doses for 3 mo or stable benzodiazepines for 2 wk
Dilkov et al.87 (2017)20 Hz
110% rMT
20 trains, 9 s per train; 51 s intertrain interval5 cm rostral to motor cortex90° from skull, same intensityAllowedMonotherapyStable doses for 6 mo or no medications for at least 2 wk
Herrmann et al.117 (2017)10 Hz
100% rMT
40 trains of 4 s (1560 pulses; intertrain interval 26 sFPZSham coilVirtual reality exposureAugmentationNot allowed
Huang et al.118 (2018)1 Hz
90% rMT
3 trains of 500 pulses; intertrial interval 10 minP4Sham coilNot allowedMonotherapyStable doses for 3 mo
Mantovani et al.119 (2013)1 Hz
110% rMT
30 min5 cm anterior to motor cortexSham coilAllowedMonotherapyStable doses for 4 wk or no medication for 6–8 wk before
Movahed et al.120 (2018)2 mA
Electrode size NR
20 minF4Left deltoidNRNot allowedMonotherapyNot allowed
Nasiri et al.121 (2020)2 mA
Electrode size 5 × 5
30 minF4Left deltoidF3UP 12 sessionsMonotherapyNot allowed
Notzon et al.88 (2015)15 Hz
80% rMT
3 min; 18 trains of 2 sF390° from skullVirtual reality exposureAugmentationNot allowed
Prasko et al.122 (2007)1 Hz
110% rMT
30 min5 cm rostral to motor cortex90° from skull, same intensityNRMonotherapyStable doses
  • EEG = electroencephalogram; F3 = 10–20 EEG position corresponding to the left dorsolateral prefrontal cortex; F4 = 10–20 EEG position corresponding to the right dorsolateral prefrontal cortex; FP2 = 10–20 EEG position corresponding to the supraorbital region; FPZ = 10–20 EEG position corresponding to the ventromedial prefrontal cortex; MNI = Montreal Neurological Institute; NR = not reported; P4 = 10–20 EEG position corresponding to the right posterior parietal cortex; rMT = resting motor threshold; UP = unified protocol.