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Table 3 Latencies (in milliseconds) of VEPs 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
N1 75.3 ± 7.4 76.4 ± 5.9 76.1 ± 5.5 75.2 ± 3.6 75.3 ± 4.2 77.2 ± 7.2 78.4 ± 6.2
P1 103.7 ± 4.8 102.9 ± 9.0 103.2 ± 9.0 101.8 ± 4.4 100.1 ± 6.6 103.7 ± 7.4 105.4 ± 10.1
N2 145.1 ± 8.3 144.9 ± 9.9 143.8 ± 10.4 141.8 ± 11.6 141.7 ± 11.9 147.2 ± 8.4 145.0 ± 11.3
N1-P1 1st amplitude block (μV) 8.3 ± 2.3 8.5 ± 4.0 9.3 ± 3.9 10.2 ± 3.7 10.5 ± 3.8 7.0 ± 3.8 8.4 ± 4.0
N1-P1 amplitude slope - 0.3 ± 0.2 0.1 ± 0.3 § - 0.2 ± 0.3 * 0.2 ± 2.6 - 0.2 ± 0.3 * 0.05 ± 0.3 - 0.2 ± 0.3 *
P1-N2 1st amplitude block (μV) 7.6 ± 3.3 9.1 ± 4.2 8.3 ± 4.4 9.7 ± 4.5 9.3 ± 5.0 8.6 ± 4.1 7.5 ± 3.9
P1-N2 amplitude slope −0.3 ± 0.7 - 0.1 ± 0.2 - 0.05 ± 0.3 0.005 ± 0.2 - 0.02 ± 0.2 - 0.1 ± 0.3 - 0.06 ± 0.1
  1. Data are expressed as means ± SD. * = p < 0.05 before vs. after 1-month KD. § = p < 0.01 vs. HV