Beta-ERD response | Mean ratio (± SD retransformed) | | | |
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| Migraine | Control | t | df | p |
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C3 SM | 0.79 (0.54–1.16) | 0.82 (0.51–1.32) | .30 | 57.4 | .76 |
C3 M | 0.99 (0.65–1.51) | 0.88 (0.61–1.28) | −1.12 | 61.8 | .27 |
C4 SM | 0.77 (0.53–1.13) | 0.87 (0.58–1.31) | 1.21 | 60.6 | .23 |
C4 M | 1.05 (0.63–1.74) | 1.07 (0.70–1.64) | .14 | 61.3 | .89 |
- Beta-ERD response is the ratio between mean power in the interval from 1 to 3 s after movement onset and mean power in the interval − 3 to −1 s before movement onset (baseline). Ratios were LN-transformed before statistical analysis and retransformed to mean ratios and mean ± SD for tabulation. Two-sample Student’s t-tests (equal variance not assumed) are included. EEG from central electrodes C3 (contralateral, left) and C4 (ipsilateral, right). SM = sensorimotor test, M = motor test