Table 4 ERSP power (dB) 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 | ||
|---|---|---|---|---|---|
2–10 Hz | PRE | 8.4 ± 0.8 | 7.2 ± 0.7 | 7.8 ± 0.7 | 8.3 ± 0.9 |
POST | 7.0 ± 0.8 | 6.1 ± 0.7 | 6.1 ± 0.7 | 6.7 ± 0.9 | |
8–29 Hz | PRE | − 1.8 ± 0.3 | − 2.1 ± 0.3 | − 2.0 ± 0.4 | − 2.2 ± 0.4 |
POST | − 1.4 ± 0.3 | − 1.9 ± 0.3 | − 1.7 ± 0.4 | − 1.8 ± 0.4 | |
30–60 Hz | PRE | 0.9 ± 0.3 | 1.0 ± 0.3 | 1.1 ± 0.2 | 1.1 ± 0.3 |
POST | 1.0 ± 0.3 | 1.1 ± 0.3 | 0.9 ± 0.2 | 1.1 ± 0.3 | |
61–100 Hz | PRE | 1.4 ± 0.4 | 1.8 ± 0.2 | 1.4 ± 0.4 | 1.6 ± 0.2 |
POST | 1.4 ± 0.4 | 1.6 ± 0.2 | 1.6 ± 0.4 | 1.3 ± 0.2 |