Effects of Repetitive Transcranial Magnetic Stimulation Combined With Cognitive Training of Response Inhibition on...

Repetitive transcranial magnetic stimulation (rTMS) combined with cognitive training (CT) has been explored as a potential novel method to improve response inhibition, but its neural mechanisms remain unclear. This study investigated the effects of rTMS + CT on oscillatory activity across different frequency bands and theta-gamma phase-amplitude coupling during the Stroop task. Sixty healthy participants were randomly assigned to receive four sessions of either active or sham prolonged intermittent theta burst stimulation (iTBS) + CT. Each session involved iTBS over both the right inferior frontal cortex and the pre-supplementary motor area, with participants completing the Stop Signal training task first, followed by the Go/No-Go training task. The Stroop task was administered before and immediately after the intervention while electroencephalography was recorded. There was a significant group effect on the change in beta desynchronization during incongruent trials (t = -2.03, p = 0.048), with a significant decrease observed in the active group (p = 0.03) and no change in the sham group (p = 0.83). Additionally, changes in gamma synchronization differed between groups for congruent trials (t = 2.28, p = 0.03), though neither group showed a significant pre-post change (p > 0.05). Our study suggests that four sessions of iTBS + CT may modulate beta and gamma oscillations during the Stroop task, potentially enhancing motor inhibition and processing speed in response inhibition. These results provide neurophysiological insights into the neural mechanisms through which rTMS + CT may enhance response inhibition.