Table 3 N2 and P2 peak latency (ms) for the four experimental groups (mean ± SD)
From: Effects of chiropractic spinal manipulation on laser-evoked pain and brain activity
No intervention | Placebo intervention | SM at T4 | SM at T8 | |||
|---|---|---|---|---|---|---|
Aδ | N2 | PRE | 201.9 ± 8.5 | 220.8 ± 9.1 | 217.0 ± 7.5 | 224.1 ± 15.3 |
POST | 195.6 ± 8.5 | 208.4 ± 9.1 | 214.9 ± 7.5 | 223.6 ± 15.3 | ||
P2 | PRE | 377.9 ± 21.4 | 398.3 ± 41.7 | 407.4 ± 35.8 | 398.8 ± 16.2 | |
POST | 361.0 ± 21.4 | 393.0 ± 41.7 | 411.5 ± 35.8 | 401.8 ± 16.2 | ||
C | N2 | PRE | 543.7 ± 13.3 | 513.8 ± 11.0 | 476.6 ± 16.5 | 483.0 ± 9.4 |
POST | 544.7 ± 13.3 | 521.2 ± 22.0 | 465.7 ± 16.5 | 489.2 ± 9.4 | ||
P2 | PRE | 603.5 ± 17.0 | 601.7 ± 16.5 | 577.8 ± 21.0 | 596.4 ± 8.1 | |
POST | 594.9 ± 17.0 | 609.9 ± 16.5 | 575.8 ± 21.0 | 586.6 ± 8.1 | ||