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Table 4 Grand-average somatosensory evoked potentials (SSEPs) latencies and amplitudes in healthy volunteers (HV), in the total group of migraine patients (M-tot) and its subgroups undergoing normo- (M-norm) or hypo- (M-hypo) caloric ketogenic diet (KD) before and after 1-month KD

From: Cortical functional correlates of responsiveness to short-lasting preventive intervention with ketogenic diet in migraine: a multimodal evoked potentials study

Electrophysiological parameters HV (n = 18) M-tot (n = 18)   M-norm (n = 8)   M-hypo (n = 10)  
   Before After Before After Before After
N9 (ms) 9.7 ± 0.7 9.8 ± 0.9 9.8 ± 0.7 9.5 ± 0.7 9.5 ± 0.7 10.0 ± 1.0 10.1 ± 0.5
N13 (ms) 13.4 ± 0.8 13.4 ± 1.0 13.3 ± 1.0 13.0 ± 0.7 13.0 ± 0.9 13.6 ± 1.1 13.6 ± 1.0
N20 (ms) 19.4 ± 1.2 19.1 ± 1.3 19.1 ± 1.2 18.4 ± 0.7 18.7 ± 0.8 19.7 ± 1.4 19.5 ± 1.4
P25 (ms) 24.9 ± 2.1 24.9 ± 3.1 25.7 ± 3.1 24.3 ± 2.2 25.1 ± 2.3 25.4 ± 3.7 26.1 ± 3.7
N33 (ms) 30.6 ± 2.4 31.5 ± 2.3 31.4 ± 3.1 31.2 ± 1.9 31.3 ± 3.1 31.8 ± 2.6 31.5 ± 3.3
N9-p (μV) 2.9 ± 1.4 3.0 ± 1.8 3.1 ± 2.0 3.3 ± 2.3 3.7 ± 2.3 2.7 ± 1.4 2.6 ± 1.6
N13-p (μV) 1.6 ± 0.5 1.6 ± 0.5 1.7 ± 0.5 1.8 ± 0.6 2.1 ± 0.4 1.4 ± 0.5 1.4 ± 0.4
N20-P25 (μV) 1.8 ± 0.6 1.8 ± 0.7 1.8 ± 0.9 1.8 ± 0.8 1.9 ± 1.1 1.8 ± 0.5 1.7 ± 0.6
P25-N33 (μV) 0.8 ± 0.4 0.9 ± 0.5 0.9 ± 0.4 1.0 ± 0.7 0.9 ± 0.2 0.9 ± 0.3 1.0 ± 0.5
N20-P25 1st amplitude (μV) 2.3 ± 0.9 2.1 ± 0.9 2.1 ± 1.2 2.2 ± 1.2 2.6 ± 1.5 2.0 ± 0.6 1.7 ± 0.8
N20-P25 amplitude slope - 0.3 ± 0.7 0.3 ± 0.7 § - 0.5 ± 0.6 * 0.4 ± 0.5 - 0.7 ± 0.7 * 0.2 ± 0.9 - 0.3 ± 0.4 *
  1. Data are expressed as means ± SD. * = p < 0.01 paired sample t test before vs. after 1-month ketogenic diet. § = p < 0.01 ANOVA vs. HV