| Anomia | Word-finding difficulty, particularly for low-frequency items |
| Single-word Comprehension Deficit | Loss of word meaning, especially for objects |
| Surface Dyslexia | Reading words with irregular pronunciation |
| Object Agnosia | Inability to recognize objects despite intact vision |
| Preserved Speech Fluency | Fluent, grammatically correct speech with empty content |
| Preserved Repetition | Normal repetition ability |
| Agrammatism | Omission of function words, simplified grammar, short phrases |
| Hesitant/Slow Speech | Effortful, halting speech production |
| Phonological Errors | Sound-level errors (substitutions, transpositions) |
| Motor Speech Impairment | Apraxia of speech |
| Preserved Word Comprehension | Understanding of single words relatively intact |
| Preserved Object Knowledge | Object recognition maintained |
| Databases | OMIMOrphanetClinicalTrialsPubMed |