TABLE II.
Clinical and scalp electrical features of the ictal event recorded in EEG-fMRI
| Pts | Ictal EEG pattern during fMRI | Duration | Clinical manifestations | Similar events in the run (nb) | Other types of epileptiform events (nb) | Number of F test windows (peak start/nd) | Statistical threshold (voxels/F-value) |
|---|---|---|---|---|---|---|---|
| 1 | L FT spiking activity followed by rhythmic 10–12 Hz bil F and L T activity and then by sharp and slow waves in the same areas. | 12.5 s | No | 1 | Bil FTP spikes (8) | 18 (−9/29) | 5/5.7 |
| 2 | L T sharp waves followed by clear 11– 12 Hz discharge and by LT slow waves at the end. | 10.6 s | No | 4 | No | 17 (−9/27) | 4/5.7 |
| 3 | 7 Hz sharp wave discharges over R TPO and L TO areas followed by rhythmic bil spike and waves. | 23.5 s | Possible mouth movement | 9 | Bil O slow waves (11) | 24 (−9/41) | 5/5.75 |
| 4 | R TPO discharges propagating to L homologous regions | 13.1 s | No | 2 | L TP polyspikes and spikes (4), R TP polyspikes and spikes (8), bil TP polyspikes (2) and slow waves (1) | 24 (−9/41) | 5/5.75 |
| 5 | Bil O and R TPO discharges | 13.5 s | No | — | Bil TPO rhythmic slow waves (1) | 18 (−9/29) | 5/5.7 |
| 6 | Rhythmic spike and slow wave discharges over R post quadrant followed by bil spiking activity with a clear R predominance. | 12.3 s | No | — | R T spikes (14) or slow waves (5), (4.5s before the discharge) | 17 (−9/27) | 4/5.7 |
| 7 | R F rhythmic spike and waves with secondary bil F involvement | 11.1 s | Deep breath | 3 | L FT spike (1), R F spike and slow waves (8) | 17 (−9/27) | 4/5.7 |
| 8 | Bil FC sharp waves (predominant on the R) with rapid diffusion and after 29s predominance again of sharp and slow waves over the R FC region. | 44.6 s | Leg jerks | 2 | No | 34 (−9/61) | 5/5.8 |
| 9 | R FC slow waves followed by a 10Hz rhythmic activity over bil F and parasagittal areas and then by slow waves on the R side. | 7.7 s | No | — | No | 16 (−9/25) | 4/5.7 |
| 10 | Post R T spikes associated later in the seizure with synchronous or asyn chronous L T spikes. | 45 s | No | — | R sharp waves (2), R slow waves (5), general rhythmic fast activity (3). | 34 (−9/61) | 5/5.8 |
| R T spike 9 s before seizure onset | |||||||
| Mean ± SD | 19.4 ± 14 s |
R, right; L, left; Bil, bilateral; T, temporal; F, frontal; C, central; P, parietal; O, occipital; nb, number.