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. 2019 Oct 31;9(11):303. doi: 10.3390/brainsci9110303

Table 1.

Electrical stimulation parameters used in this study.

Group Name Stimulation Parameters Charge Balance Duty Cycle Cathodic Charge Anodic Charge Waveform Shape
Monophasic Cathodic F = 50 Hz
PW = 50 μs		 Unbalanced 0.25% 7.5 nC 0 graphic file with name brainsci-09-00303-i001.jpg
Asymmetric Biphasic 1:0.5
(AsymBi 1:0.5)		 F = 50 Hz
PW = 50 μs cathodic, 25 μs anodic		 Active unbalanced 0.38% 7.5 nC 3.8 nC graphic file with name brainsci-09-00303-i002.jpg
Symmetric Biphasic 1:1
(SymBi 1:1)		 F = 50 Hz
PW = 50 μs per phase		 Active balanced 0.50% 7.5 nC 7.5 nC graphic file with name brainsci-09-00303-i003.jpg
Cathodic PR F = 50 Hz
PW = 60μs ‡ 		Passive balanced 5% * 9.0 nC 9.0 nC graphic file with name brainsci-09-00303-i004.jpg
Anodic PR F = 50 Hz
PW = 60 μs ‡ 		Passive balanced 5% * 9.0 nC 9.0 nC graphic file with name brainsci-09-00303-i005.jpg
Asymmetric Biphasic 1:2
(AsymBi 1:2)		 F = 50 Hz
PW = 50 μs cathodic, 100 μs anodic		 Active unbalanced 0.75% 7.5 nC 15 nC graphic file with name brainsci-09-00303-i006.jpg
Monophasic Anodic F = 50 Hz
PW = 50 μs		 Unbalanced 0.25% 0 7.5 nC graphic file with name brainsci-09-00303-i007.jpg

F = Frequency, PW = pulse width. Charges are mean values. Duty Cycle = (PWcathodic + PWanodic) × F. *, PW for balancing phase approximated to be around 1 ms. ‡, PW of leading phase.