Due to the impact that autism has on communication and social interactions, language is affected in most instances. Acquired neurogenic language disorders Language disorders that are neurogenic affect the nervous system and result in disruption in language production. The type of language dysfunction that occurs is dependent upon the site, extent, and cause of the brain damage. Aphasia Aphasia is a language disorder that is caused by damage to the tissue in the language center in the brain. The type of incident that most often causes Aphasia is stroke but can also occur due to traumatic brain injury, infection, tumors, and degenerative brain disorders. Aphasia is a disorder that is acquired, therefore it occurs in individuals that have already developed language. Aphasia does not affect a person's intellect or speech but Instead affects the formulation of language. All areas of language are affected by aphasia including expressive and receptive language abilities. Symptoms of aphasia vary widely but generally are defined by language deficits that affect fluency, the ability to talk, reading, writing, and comprehension. There are many types of aphasia that vary in symptoms depending upon where in the language center of the brain the damage occurred. The aphasias can be categorized as different aphasic syndromes depending upon the location of lesion and the symptoms that differentiate the aphasias from one another. Global aphasia is a type of aphasia that occurs in people where a large portion of the language center of the brain has been damaged and results in deficits in all modalities of language. Broca's aphasia, also referred to as expressive aphasia, is an aphasic syndrome in which there is damage in left hemisphere, specifically in the Broca's area, of the brain. Broca's aphasia may affect an individual's ability to produce speech while comprehension remains intact. Traumatic brain injury Traumatic brain injury (TBI) is caused by neurological damage due to an open or closed head injury. The most frequent causes of head injury include motor vehicle accidents, assault, gun related incidents, and falls, TBI is categorized as either mild, moderate or severe and can affect cognitive, psychosocial, and linguistic skills. Language skills that may be affected include comprehension, motor output, word finding, and difficulties with reading. Classification In order to help distinguish between language disorders, they are often categorized as either primary disorders of language, secondary disorders of langue, acquired or developmental. A primary language disorder is one