Inclusion and exclusion criteria for PPA diagnosis
| Criteria |
| Inclusion |
| Most prominent clinical feature is language difficulty |
| These deficits are the principal cause of impaired daily living activities |
| Aphasia should be the most prominent deficit at symptom onset and for the initial phases of the disease |
| Exclusion |
| Pattern of deficits is better accounted for by other nondegenerative nervous system or medical disorders |
| Prominent initial episodic memory, visual memory, and visuoperceptual impairments |
| Prominent initial behavioral disturbance |