Table 4 The type and location of epileptiform activity found in patients with young onset Alzheimer’s disease and young onset frontotemporal dementia
|  | Alzheimer’s disease (n = 40) | Frontotemporal dementia (n = 8) |
|---|---|---|
Type of epileptiform activity | ||
Sharp wave | 22 (55.0%) | 5 (62.5%) |
Spike and wave | 17 (42.5%) | 2 (25.0%) |
Sharp and slow waves | 23 (57.5%) | 5 (62.5%) |
Location of epileptiform activity | ||
Left frontal | 22 (55.0%) | 2 (25.0%) |
Right frontal | 16 (40.0%) | 3 (37.5%) |
Left temporal | 24 (60.0%) | 3 (37.5%) |
Right temporal | 21 (52.5%) | 4 (50.0%) |
Left posterior | 2 (5.0%) | 1 (12.5%) |
Right posterior | 6 (15.0%) | 1 (12.5%) |
Central | 11 (27.5%) | 1 (12.5%) |
Generalised | 5 (12.5%) | 0 (0.0%) |