Demographics
| Group | n | Age (y) | MMSE |
| Young controls | 10 | 33 ± 7* | >28 |
| Elderly controls | 25 | 74 ± 8 | 29 ± 1 |
| Patients with mild cognitive impairment | 10 | 75 ± 9 | 27 ± 3* |
| Patients with AD | 7 | 73 ± 11 | 24 ± 2* |
| Patients with frontotemporal dementia | 3 | 68 ± 5* | 27 ± 1* |
↵* Significantly different from elderly controls (P < 0.05).
MMSE = mini–mental state examination score.
Data are mean ± SD.