TABLE 3.

Adverse or side effects, including bodily sensations and mood state changes induced by θ-tACS.

Bodily sensations and mood states changes		Indi vidualized	Non-individualized	Sham	p-value*
Adverse or side post-modulation effects	Mild Headache	1	2	0	0.22
	Irritability	1	9	0	<0.001
	Harmonization or Calm	8	1	0	0.001
	Increase of Energy	0	3	0	0.05
	Fatigue	1	0	0	0.37
Tingling or burning during tACS		15	15	14	0.37
Phosphenes during tACS		3	2	0	0.25

The data presents adverse or side effects, including bodily sensations and mood state changes in specific θ-tACS protocols during and after θ-tACS. The data show the number of participants who reported the symptoms. The cells “tingling” or “burning” refer to sensations on the skin in the area around the neuromodulatory electrodes at the beginning of θ-tACS application. *Cochrane Q-test.