Table 1 tDCS-induced sensations and the general sensation index (discomfort) felt by participants (n = 14)
Sensation | DLPFC a-tDCS | M1 a-tDCS | Sham tDCS | χ2 | p | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Mean ± SD | Median (IQR) | n(%) | Mean ± SD | Median (IQR) | n(%) | Mean ± SD | Median (IQR) | n(%) | |||
Itchiness | 1.29 ± 0.61 | 1.0 (1.00–2.0) | 13 (92.9) | 1.14 ± 0.54 | 1.0 (1.0–1.25) | 13 (92.9) | 1.29 ± 0.47 | 1.0 (1.0–2.0) | 14 (100) | 1.60 | 0.45 |
Pain | 0.07 ± 0.27 | 0.0 (0.0–0.0) | 1 (7.1) | 0.07 ± 0.27 | 0.0 (0.0–0.0) | 1 (7.1) | 0.07 ± 0.27 | 0.0 (0.0–0.0) | 1 (7.1) | N/A | N/A |
Burning | 0.64 ± 0.63 | 1.0 (0.00–1.00) | 8 (57.1) | 0.57 ± 0.51 | 1.0 (0.0–1.0) | 8 (57.1) | 0.64 ± 0.63 | 1.0 (0.0–1.0) | 8 (57.1) | 2.00 | .37 |
Warmth/heat | 0.14 ± 0.36 | 0.0 (0.0–0.0) | 2 (14.3) | 0.14 ± 0.36 | 0.0 (0.0–0.0) | 2 (14.3) | 0.14 ± 0.36 | 0.0 (0.0–0.0) | 2 (14.3) | N/A | N/A |
Pinching | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | N/A | N/A |
Iron taste | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | N/A | N/A |
Fatigue | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | N/A | N/A |
Other | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | 0.00 ± 0.00 | 0.0 (0.0–0.0) | 0 (0) | N/A | N/A |
Discomfort | 2.14 ± 1.03 | 2.0 (1.75–2.25) | – | 1.93 ± 0.83 | 2.0 (1.0–3.0) | – | 2.14 ± 1.10 | 2.0 (1.0–3.0) | – | 1.60 | 0.45 |
Start | 0.93 ± 0.27 | 1.0 (1.0–1.0) | – | 1.14 ± 0.36 | 1.0 (1.0–1.0) | – | 1.14 ± 0.36 | 1.0 (1.0–1.0) | – | 4.50 | 0.11 |
End | 1.43 ± 0.65 | 1.0 (1.0–2.0) | – | 1.64 ± 0.63 | 2.0 (1.0–2.0) | – | 1.71 ± 0.61 | 2.0 (1.0–2.0) | – | 6.50 | 0.04 |
Affect performance | 2.21 ± 0.58 | 2.0 (2.0–3.0) | 14 (100) | 2.07 ± 0.73 | 2.0 (1.75–3.0) | 14 (100) | 2.21 ± 0.58 | 2.0 (2.0–3.0) | 14 (100) | 4.00 | 0.14 |