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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