Effectiveness of TDCS Over Broca's Area in Verb Naming: a Randomized, Double-Blind, Crossover Study

Participants receive anodic tDCS using a battery-driven Eldith (neuroConn GmbH) Programmable Direct Current Stimulator with surface-soaked sponge electrodes (5×7 cm). A constant current of 2 mA is applied for 20 minutes per session. The stimulation targets the left frontal region (F5 of the extended International 10-20 EEG system), corresponding to Broca's area, while the reference electrode is placed over the contralateral frontopolar cortex. tDCS is performed for 10 daily sessions over two consecutive weeks (5 days per week).

Participants receive sham tDCS using a battery-driven Eldith (neuroConn GmbH) Programmable Direct Current Stimulator with surface-soaked sponge electrodes (5×7 cm). No therapeutic current is applied during the 20-minute session. The electrode placement mimics the active condition, targeting the left frontal region (F5 of the extended International 10-20 EEG system), corresponding to Broca's area, while the reference electrode is placed over the contralateral frontopolar cortex. Sham tDCS is performed for 10 daily sessions over two consecutive weeks (5 days per week).