Table 4. Correlations between the normalized pain NRS on different levels of nociceptive images and the amplitudes of the later ERP components at selected sites (included only those with p<0.05).
| Normalized Pain NRS | ||||
| Level 1 | Level 3 | Level 5 | Average | |
| P2 Component | ||||
| F4 | –0.501 | –0.549 | –0.469 | –0.456 |
| Cz | –0.455 | |||
| P3 | –0.444 | –0.441 | ||
| P3 Component | ||||
| F4 | –0.556 | –0.483 | –0.436 | |
| Cz | –0.582 | |||
| P3 | –0.497 | –0.449 | –0.414 | |
| N400 Component | ||||
| F4 | –0.470 | –0.549 | –0.418 | |
| Cz | –0.530 | –0.417 | –0.406 | |
| P3 | –0.524 | |||
| P600 Component | ||||
| F4 | –0.482 | |||
| Cz | –0.489 | |||
Note: All significant level was p<0.05; Normalized Pain NRS = NRSImagery–NRSPerception. Average normalized pain NRS is computed by averaging the ratings across five levels of stimulation.
No significant correlations were obtained for levels 2 and 4 normalized pain NRS.