Aphasia is a disorder that affects language abilities due to brain damage, usually from a stroke or injury. Learn about the symptoms, diagnosis, and treatment of different types of aphasia , as well as the research on aphasia and dementia. Aphasia is an acquired neurogenic language disorder resulting from brain injury. Aphasia may affect receptive and expressive language. Numerous types of aphasia exist, with eight classically identified: anomic aphasia , Broca’s aphasia , conduction aphasia , global aphasia , mixed transcortical aphasia , transcortical motor aphasia , transcortical sensory aphasia , and Wernicke’s aphasia . Also (but much less preferably) called dysphasia. —aphasic adj. Aphasia affects how you communicate and understand language. Learn more about what causes this condition and how to treat it.