Discussion:
The findings of the current study indicated that applying a-tDCS (1 and
2 mA) and also 2 mA c-tDCS improved online motor learning compared to
the 1 mA c-tDCS and sham tDCS groups, with more significant effects of
a-tDCS (1 and 2 mA). Moreover, the lasting effects of motor learning are
also shown in a-tDCS (1&2 mA) and 2 mA c-tDCS groups. Additionally, the
results indicated that 1 mA c-tDCS can disturb both online and offline
motor learning.