Table 3 The type and location of slow wave changes found in patients with young onset Alzheimer’s disease and young onset frontotemporal dementia
|  | Alzheimer’s disease (n = 89) | Frontotemporal dementia (n = 12) |
|---|---|---|
Type of slow wave changes | ||
Only theta frequencies | 25 (28.1%) | 6 (50.0%) |
Only delta frequencies | 11 (12.4%) | 0 (0.0%) |
Theta and delta frequencies | 53 (59.6%) | 6 (50.0%) |
Location of slow wave changes | ||
Left frontal | 72 (80.1%) | 9 (75.0%) |
Right frontal | 62 (69.7%) | 8 (66.7%) |
Left temporal | 70 (78.7%) | 10 (83.3%) |
Right temporal | 57 (64.0%) | 10 (83.3%) |
Left posterior | 10 (11.2%) | 1 (8.3%) |
Right posterior | 9 (10.1%) | 1 (8.3%) |
Central | 18 (20.2%) | 1 (8.3%) |
Generalised* | 42 (47.2%) | 0 (0.0%) |