Table 2.
Mean amplitude in μV and standard deviation (SD) of the three ERP components in response to the first (S1) and second (S2) stimuli in each region of interest and group.
| Region | Young (n = 20) Mean (SD) | Older (n = 20) Mean (SD) | |||
|---|---|---|---|---|---|
| S1 | S2 | S1 | S2 | ||
| P50 | Frontal | −3.18 (1.481) | −1.09 (0.825) | −2.72 (0.964) | −0.68 (0.748) |
| Fronto-central | 1.45 (1.103) | 0.49 (0.456) | 1.63 (0.701) | 0.94 (0.568) | |
| Central | 1.92 (0.850) | 0.59 (0.719) | 2.75 (1.105) | 1.05 (0.581) | |
| Centro-parietal | 2.07 (1.019) | 1.01 (0.813) | 2.76 (1.022) | 1.28 (0.751) | |
| N100 | Frontal | 5.45 (3.233) | 2.40 (1.159) | 2.20 (1.585) | 1.73 (0.974) |
| Fronto-central | −3.52 (2.236) | −1.51 (0.602) | −3.16 (1.939) | −1.01 (0.655) | |
| Central | −5.18 (2.523) | −2.04 (0.994) | −3.39 (2.814) | −1.48 (0.951) | |
| Centro-parietal | −4.14 (2.480) | −1.79 (1.037) | −1.54 (2.126) | −1.23 (0.958) | |
| LPC | Frontal | 1.61 (1.587) | 0.26 (0.803) | 0.30 (1.491) | 0.51 (0.772) |
| Fronto-central | 2.55 (1.595) | 0.64 (0.745) | 0.86 (1.480) | 0.61 (0.718) | |
| Central | 2.24 (1.691) | 0.66 (0.657) | 0.90 (1.270) | 0.41 (0.560) | |
| Centro-parietal | 1.46 (1.575) | 0.49(0.678) | 1.01 (1.182) | 0.23 (0.706) | |