Table 3 SSEP and EEG findings in epileptic and non-epileptic myoclonus
Epileptic myoclonus (N = 29) | Non-epileptic (N = 21) | P value | |
|---|---|---|---|
Age | 32.76 ± 11.96 | 48.33 ± 16.08 | < 0.001* |
Sex | |||
Male | 11 | 12 | 0.179 |
Female | 18 | 9 | |
Right median nerve | |||
N20 amplitude | 1.99 ± .68 | 1.87 ± .75 | 0.590 |
N20 latency | 23.24 ± .17 | 23.26 ± .14 | 0.792 |
P24 amplitude | 8.95 ± 17.98 | 7.34 ± 1.86 | 0.687 |
N24 latency | 25.08 ± .39 | 25.07 ± .61 | 0.924 |
N33 amplitude | 10.77 ± 20.21 | 9.11 ± 2.05 | 0.664 |
N33 latency | 33.86 ± .27 | 34.11 ± .57 | 0.070 |
P24–N33 complex amp | 19.72 ± 38.16 | 16.50 ± 3.68 | 0.655 |
Left median nerve | |||
N20 amplitude | 1.97 ± .73 | 1.92 ± .73 | 0.835 |
N20 latency | 23.20 ± .13 | 23.26 ± .13 | 0.106 |
P24 amplitude | 8.56 ± 15.07 | 7.60 ± 2.11 | 0.739 |
P24 latency | 25.14 ± .53 | 24.88 ± .25 | 0.105 |
N33 amplitude | 10.75 ± 17.78 | 9.37 ± 2.42 | 0.681 |
N33 latency | 33.97 ± .49 | 33.96 ± .53 | 0.977 |
P24–N33 complex amp | 19.33 ± 32.84 | 16.97 ± 4.46 | 0.705 |
EEG findings | |||
Spike/polyspike wave complex | 22 | 8 | 0.007* |
Normal | 7 | 13 | |