| EEG and partial onset epilepsy |
 | Spikes: steep ascending & descending negative wave, lasts 20-70 msec.
|
| Sharp wave: as above, lasts 70-200 msec. |
|
| Temporal Sharp |
| most common finding in patient with partial onset seizure |
|
| Bitemporal sharp |
| most patients have seizure starting from one side, may still be surgical
candidate |
|
| Central sharp |
| 50% of patient do not have seizure |
|
| Central temporal spike |
| (Rolandic spike) diphasic or polyphasic discharge of 200-300 msec |
| usually seen in Benign Childhood epilepsy |
|
| Occipital spike |
| least epileptogenic, 40-50% has seizures |
|
| TIRDA: |
| interictal temporal intermittent rhythmic delta activity: moderate
amplititude rhythmic delta activity in temporal area, most prominent during drowsiness
& NREM sleep |
| epileptogenic significance similar to temporal sharp waves |
|
| Bifrontal spike & slow wave |
| seen in partial onset seizure with inferior or mesial frontal
epileptogenic focus |
|
| PLEDS: |
| periodic lateralized epileptiform discharges |
| seen in acute cerebral injuries, >60% will have seizure |
|
