الفهرس 
A NATOMICAL O VERVIEWOnly 14 pages are availabe for public view
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Abstract
Aphasia is most often caused by stroke, but any disease or damage to the parts of the brain that control language can cause aphasia. Some of these can include brain tumors, traumatic brain injury, and progressive neurological disorders. In rare cases, aphasia may also result from herpes viral encephalitis.
Aphasia is best thought of as a collection of different disorders, rather than a single problem.
People with aphasia may experience any of the following behaviors due to an acquired brain injury. Aphasia symptoms can vary based on the location of damage in the brain. Signs and symptoms may or may not be present in individuals with aphasia and may vary in severity and level of disruption to communication.
Inability to comprehend language, Inability to pronounce not due to muscle paralysis or weakness, Inability to speak spontaneously, Inability to form words, Inability to name objects (anomia), Poor enunciation, Excessive creation and use of personal neologisms, Inability to repeat a phrase, Persistent repetition of one syllable, word, or phrase (stereotypies, recurrent/recurring utterances/speech automatism),Paraphasia (substituting letters, syllables or words), Agrammatism (inability to speak in a grammatically correct fashion), Dysprosody (alterations in inflexion, stress, and rhythm), Incomplete sentences, Inability to read, Inability to write, Limited verbal output, Difficulty in naming, Speech disorder, Speaking gibberish and Inability to follow or understand simple requests.