Table 1.
Amplitudes and latencies for evoked potential components N2 and P2 across experimental condition (Placebo or Control), Order of stimulation (P first or C first) and Run
| Placebo | Control | |||||||
|---|---|---|---|---|---|---|---|---|
| P first | C first | P first | C first | |||||
| Run 1 | Run 2 | Run 1 | Run 2 | Run 1 | Run 2 | Run 1 | Run 2 | |
| N2 amplitude (µV) | ||||||||
| FCz | −10.35 (2.32) | −10.69 (2.71) | −9.59 (2.61) | −6.62 (2.18) | −11.36 (2.59) | −10.67 (2.62) | −11.11 (3.16) | −8.76 (2.44) |
| Cz | −12.16 (2.24) | −12.43 (2.45) | −8.13 (2.29) | −5.59 (1.93) | −12.69 (2.21) | −11.67 (2.27) | −9.65 (3.06) | −8.28 (2.34) |
| CPz | −9.19 (1.94) | −10.00 (2.06) | −5.05 (1.56) | −3.11 (1.35) | −8.83 (1.74) | −8.34 (1.95) | −5.91 (2.18) | −5.52 (1.69) |
| Pz | −5.96 (1.41) | −7.12 (1.48) | −3.14 (0.87) | −2.21 (0.99) | −5.66 (1.17) | −5.90 (1.49) | −3.57 (1.48) | −3.79 (1.22) |
| P2 amplitude (µV) | ||||||||
| FCz | 16.26 (1.60) | 13.72 (1.09) | 14.76 (2.49) | 14.05 (2.50) | 15.45 (1.40) | 12.50 (1.40) | 20.85 (3.29) | 15.84 (3.29) |
| Cz | 18.13 (2.00) | 15.43 (1.75) | 16.21 (2.60) | 14.68 (2.61) | 17.76 (2.25) | 13.84 (1.49) | 22.21 (3.36) | 16.58 (3.36) |
| CPz | 17.86 (1.65) | 15.49 (1.75) | 16.64 (2.66) | 14.69 (2.56) | 18.04 (2.12) | 14.44 (1.39) | 21.40 (3.46) | 16.29 (3.25) |
| Pz | 15.03 (1.43) | 12.89 (1.39) | 14.56 (2.38) | 12.34 (2.16) | 15.69 (1.69) | 12.05 (1.04) | 18.86 (3.01) | 14.41 (2.69) |
| N2 latency (ms) | ||||||||
| FCz | 201.8 (15.3) | 187.2 (4.2) | 183.7 (7.4) | 201.8 (12.5) | 190.7 (6.6) | 204.3 (14.8) | 206.7 (15.4) | 209.7 (15.1) |
| Cz | 183.3 (8.2) | 180.3 (4.4) | 182.8 (7.3) | 187.2 (9.9) | 186.5 (7.5) | 200.3 (7.9) | 191.0 (11.5) | 202.2 (15.6) |
| CPz | 186.8 (6.8) | 191.7 (8.7) | 178.3 (8.1) | 193.0 (9.8) | 196.7 (8.4) | 197.5 (7.2) | 204.5 (13.5) | 184.8 (8.1) |
| Pz | 188.3 (7.4) | 193.3 (9.3) | 196.3 (12.5) | 211.8 (11.4) | 203.2 (8.7) | 197.7 (8.7) | 206.0 (14.2) | 196.3 (13.0) |
| P2 latency (ms) | ||||||||
| FCz | 321.5 (18.3) | 319.0 (12.8) | 327.5 (18.5) | 340.3 (15.7) | 322.0 (14.1) | 333.7 (17.5) | 328.3 (13.9) | 350.2 (22.2) |
| Cz | 314.5 (16.5) | 319.7 (11.8) | 338.7 (14.7) | 344.2 (14.3) | 320.7 (12.3) | 321.0 (13.4) | 320.8 (11.5) | 344.3 (13.1) |
| CPz | 321.0 (16.9) | 339.0 (15.5) | 334.7 (12.9) | 353.7 (10.8) | 330.7 (14.6) | 331.0 (12.7) | 334.5 (12.5) | 346.0 (13.0) |
| Pz | 322.3 (16.5) | 340.0 (12.9) | 343.7 (14.0) | 363.2 (13.9) | 333.3 (14.5) | 339.5 (11.8) | 338.5 (14.3) | 367.5 (16.6) |
Values are mean and standard error (n = 24)