How are primary progressive aphasias differentiated?
Agrammatic/nonfluent aphasia is a disorder of word order and production . Fluency Impaired Naming Some anomia Repetition Impaired Comprehension Intact (simple items) Reading Intact (short pieces)
Logopenic progressive aphasia is a disorder of word finding.
Fluency OK Naming Anomia Repetition OK Comprehension Intact (simple items) Reading Intact (short pieces)
Semantic dementia is a disorder of word understanding.
Fluency OK Naming Some anomia Repetition OK Comprehension Impaired, even for single words Reading Surface dyslexia (literally phonetic reading such that individuals are unable to pronounce irregular nouns)
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