Abstract
Repetitive transcranial magnetic stimulation (rTMS) has been developed as a novel tool for modulating cognition by delivering stimulation in the brain. However, the effects of rTMS on cognition are still controversial. This randomized, sham-controlled, crossover study was designed to determine whether rTMS of the left dorsolateral prefrontal cortex (DLPFC) interferes with the Go/NoGo task and whether personal parameters such as age affect rTMS. A total of 24 healthy subjects (12 male and 12 female, aged 20-37 years) underwent one session of active rTMS followed by sham rTMS (total of 1600 pulses, 100% of motor threshold, 5 Hz, 8 s), or vice versa. The results did not show any differences between active and sham rTMS stimulation in terms of performance accuracy, response speed, or choice reaction time (cRT) implicating that short-term rTMS will not enhance or deteriorate cognition. However, percentage cRT shortening induced by active rTMS was negatively correlated with age (r = -0.57, P = 0.005), whereas that induced by sham rTMS was not (r = -0.23, P > 0.05), suggesting that cognition of younger subjects might have greater modulation by active stimulation than older ones. This finding may help explain some of the controversies ...Continue Reading
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