Primary Progressive Aphasia is not caused by stroke or injury but by degenerative neurological conditions. Language difficulties gradually worsen over time.

• Progression: Gradually worsening language abilities
• Varies by subtype: May affect grammar, word meanings, or speech production
• Other cognitive functions: Initially preserved, unlike typical dementia
• Age of onset: Often affects people in their 50s and 60s

The impact depends on the specific type of PPA, but generally language difficulties become more pronounced over time, eventually affecting daily communication significantly.