Most people who've heard the word aphasia picture it happening after a stroke, all at once. Primary progressive aphasia is different. It's caused by neurodegenerative disease, not injury, and it shows up gradually, sometimes years before any other symptom appears. In this video, we break down the three distinct types of PPA: nonfluent/agrammatic, semantic, and logopenic, and why knowing which one you're watching changes what to expect and what to ask your neurologist.

0:00 Why this isn't the aphasia you're picturing
0:46 The different types of aphasia (and where PPA fits)
2:22 Nonfluent/agrammatic variant
3:05 Semantic variant
3:51 Logopenic variant
4:35 Why the distinction matters (and where the research still falls short)
5:37 What this means for your next appointment

Classification referenced: Gorno-Tempini et al., 2011, Neurology.

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