Table 6.

The advantages and disadvantages of transcranial direct current stimulation (tDCS).

Transcranial direct current stimulation (tDCS)
Advantages	(1) Relative ease of use and good safety profile [37]. (2) A safe, noninvasive technique [39]. (3) Stimulation was well-tolerated [39]. (4) It is a painless, noninvasive, easily applied, and effective therapy [40].
Disadvantages	(1) There is an ongoing debate about the precise neurophysiological processes that are stimulated by these techniques [36]. (2) They can only directly affect activity in cortical regions [36]. (3) Did not focus on possible late-occurring side effects or side (4) Effects that might be caused by intensified use [36]. (5) Lack of large-sample clinical trials [40].