Table 2.
Predominant neuromagnetic activities in interictal epileptiform discharges (IED), non-IED and healthy controls (HC) group.
| Frequency band (Hz) | Source location | Non-IED | IED | HC | p-value | Non-IED vs. IED (P-value) | Non-IED vs. HC (P-value) | IED vs. HC (P-value) |
|---|---|---|---|---|---|---|---|---|
| 1–4 | PR | 3 | 7 | 1 | 0.027* | 0.198 | 0.311 | 0.024 |
| PC/PCC | 1 | 0 | 7 | 0.001* | 0.476 | 0.024 | 0.004** | |
| MFC | 10 | 5 | 10 | 0.007* | 0.012** | 1.000 | 0.063 | |
| MTL | 0 | 0 | 0 | 1.000 | – | – | – | |
| 4–8 | PR | 3 | 7 | 3 | 0.234 | – | – | – |
| PC/PCC | 3 | 2 | 4 | 0.709 | – | – | – | |
| MFC | 9 | 9 | 11 | 0.512 | – | – | – | |
| MTL | 0 | 0 | 0 | 1.000 | – | – | – | |
| 8–12 | PR | 0 | 2 | 0 | 0.313 | – | – | – |
| PC/PCC | 4 | 2 | 6 | 0.207 | – | – | – | |
| MFC | 9 | 8 | 8 | 0.649 | – | – | – | |
| MTL | 0 | 0 | 0 | 1.000 | – | – | – | |
| 12–30 | PR | 0 | 5 | 1 | 0.029* | 0.035 | 1.000 | 0.149 |
| PC/PCC | 1 | 2 | 6 | 0.085 | – | – | – | |
| MFC | 9 | 6 | 8 | 0.297 | – | – | – | |
| MTL | 0 | 0 | 0 | 1.000 | – | – | – | |
| 30–80 | PR | 1 | 4 | 0 | 0.062 | – | – | – |
| PC/PCC | 0 | 0 | 0 | 1.000 | – | – | – | |
| MFC | 9 | 10 | 8 | 0.579 | – | – | – | |
| MTL | 9 | 7 | 2 | 0.003* | 0.311 | 0.002** | 0.080 | |
| 80–250 | PR | 0 | 0 | 0 | 1.000 | – | – | – |
| PC/PCC | 0 | 0 | 0 | 1.000 | – | – | – | |
| MFC | 6 | 6 | 8 | 0.737 | – | – | – | |
| MTL | 9 | 7 | 7 | 0.336 | – | – | – | |
| 250–500 | PR | 0 | 0 | 0 | 1.000 | – | – | – |
| PC/PCC | 0 | 0 | 0 | 1.000 | – | – | – | |
| MFC | 9 | 6 | 9 | 0.202 | – | – | – | |
| MTL | 10 | 9 | 8 | 0.327 | – | – | – |
PR, peri-Rolandic area; PC/PCC, precuneus/posterior cingulate; MFC, medial frontal cortex; MTL, medial temporal lobe. *p < 0.05 after Fisher’s exact test; **p < 0.0167 after Bonferroni multiple.