Table 2 N2 and P2 peak amplitude (µV) 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 | − 7.2 ± 1.5 | − 7.3 ± 1.2 | − 6.4 ± 1.0 | − 7.7 ± 1.1 |
POST | − 5.4 ± 1.5 | − 6.2 ± 1.2 | − 5.1 ± 1.0 | − 5.7 ± 1.1 | ||
P2 | PRE | 10.5 ± 1.1 | 7.3 ± 1.0 | 8.0 ± 1.1 | 9.0 ± 1.2 | |
POST | 8.5 ± 1.1 | 6.6 ± 1.0 | 5.9 ± 1.1 | 7.0 ± 1.2 | ||
C | N2 | PRE | 2.2 ± 0.71 | 0.49 ± 0.46 | 1.8 ± 0.78 | 0.42 ± 1.3 |
POST | 3.5 ± 0.71 | 0.25 ± 0.46 | 1.0 ± 0.78 | 0.57 ± 1.3 | ||
P2 | PRE | 4.4 ± 0.82 | 3.8 ± 0.42 | 5.4 ± 0.62 | 3.8 ± 1.2 | |
POST | 4.9 ± 0.82 | 3.5 ± 0.42 | 4.8 ± 0.62 | 4.2 ± 1.2 | ||