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Table 2 Latencies and amplitudes of the various cortical SSEP components after median nerve stimulation (mean ± standard deviation)

From: Short-latency afferent inhibition and somato-sensory evoked potentials during the migraine cycle: surrogate markers of a cycling cholinergic thalamo-cortical drive?

 

HV

(n = 16)

MO

(n = 16)

MI

(N = 14)

N20 (ms)

19.0 ± 0.9

18.6 ± 0.7

18.9 ± 0.9

P25 (ms)

23.6 ± 1.8

23.2 ± 1.7

23.0 ± 2.1

N20-P25 (μV)

2.3 ± 0.9

2.2 ± 0.9

1.8 ± 1.0

1st N20-P25 (μV)

2.8 ± 1.1

2.1 ± 0.9

2.1 ± 1.1

2nd N20-P25 (μV)

2.4 ± 0.9

2.5 ± 0.9

1.9 ± 1.0

3rd N20-P25 (μV)

2.5 ± 0.9

2.5 ± 0.9

1.9 ± 0.9

Slope (block 1–3)

− 0.33 ± 0.44 *

0.49 ± 0.51

−0.14 ± 0.32 **

Early HFOs amplitude (μV)

0.058 ± 0.022 *

0.039 ± 0.019

0.051 ± 0.025

Late HFOs amplitude (μV)

0.061 ± 0.039

0.043 ± 0.019

0.070 ± 0.033

  1. (p < 0.05 * MO vs. HV, ** MI vs. MO) HV Healthy volunteers, MO Migraine patients between attacks, MI Migraine patients during attacks