Table 2.
Description of ictal EEG patterns and the locations of GLM activations and deactivations.
| Patient | # ictal events | Ictal EEG pattern | Duration (seconds, mean ± standard deviation) | GLM fMRI activation | GLM fMRI deactivation |
|---|---|---|---|---|---|
| 1 | 30 | RT high amplitude sharp slow wave followed by low amplitude polyspikes | 3.5±1.1 | Widespread RFTP, L cerebellum | BilO, scattered LFTP |
| 2 | 1 | R posterior T sharp rhythmic activity | 22.3±0 | BilTP, RF | BilF |
| 3 | 1 | RCT rhythmic activity | 65.4±0 | BilTO, BilF, Bil cerebellum | Bil insula, mesial F |
| 4 | 4 | LT rhythmic sharp waves | 2.6±1.0 | BilTO, BilF, Bil cerebellum | BilT, BilO, BilFP |
| 5 | 3 | R posterior spike and slow waves followed by Bil spikes predominantly R | 9.7±4.8 | RTPO (around the lesion) | BilFT, BilO |
| 6 | 10 | RF rhythmic spike and waves with secondary BilF involvement | 23.9±15.6 | BilTO, BilF, Bil cerebellum | BilT, BilF, BilPO |
| 7 | 1 | LCP rhythmic sharp fast activity | 9.1±0 | RT, BilO, LCP, Bil cerebellum | BilF, BilP |
| 8 | 11 | RTPO discharges propagating to L homologous regions | 4.5±3.2 | BilTPO, RFP, R cerebellum | LFTP, BilF, BilO, L cerebellum |
| 9 | 2 | BilO and RTPO discharges | 11.9±3.0 | Bil mesial F, BilTO | BilO, BilFC |
| 10 | 10 | BilFC sharp waves predominantly R becoming more diffuse | 10.6±5.1 | BilCP, RTP, Bil thalamus, Bil putamen, Bil cerebellum | BilF, RPO |
| 11 | 3 | RFC slow waves followed by BilF and parasagittal rhythmic activity and then R slow waves | 9.3±2.3 | BilFC, BilT, BilO | Bil inferior F, BilPO |
| 12 | 1 | RT spikes and later synchronous or asynchronous LT spikes | 44.3±0 | BilT, BilC | RF, RPO, L cerebellum |
| 13 | 31 | LT rhythmic sharp waves followed by rhythmic discharges and LT slow waves | 10.3±2.2 | Widespread L hemisphere, BilTP, Bil cerebellum | RFT, BilO, BilC |
| 14 | 12 | LFT spiking activity followed by BilF and LT rhythmic activity and then sharp and slow waves in the same areas | 14.6±3.9 | BilF, Bil cerebellum | BilTP, Bil inferior F, BilO |
| 15 | 1 | RTPO and LTO sharp wave discharges followed by rhythmic Bil spike and waves | 23.5±0 | BilT, RF, Bil cerebellum | BilPO, BilF |
Responses concordant with the presumed epileptogenic focus are indicated in bold type. Abbreviations: R: right, L: left, Bil: bilateral, F: frontal, C: central, T: temporal, P: parietal, O: occipital.