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Table 5 Beta-ERD mean of response/baseline ratios in interictal migraine subjects and controls

From: Fluctuations of sensorimotor processing in migraine: a controlled longitudinal study of beta event related desynchronization

Beta-ERD response Mean ratio (± SD retransformed)    
  Migraine Control t df p
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
  1. 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
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