More common *<unk>  or brain anoxia. * Brain tumor * Brain trauma Less common * Autoimmune disease * Paraneoplastic syndrome * Micrometastasis * neurodegenerative disorders * Certain infections (e.g., Bartonella henselae) * Metabolic disease (e.g., hyperosmolar hyperglycemic state) Common causes The most common cause of expressive aphasia is<unk> . A<unk>  is caused by hypoperfusion (lack of oxygen) to an area of the brain, which is commonly caused by thrombosis or embolism. Some form of aphasia occurs in 34 to 38% of<unk>  patients. Expressive aphasia occurs in approximately 12% of new cases of aphasia caused by<unk> . In most cases, expressive aphasia is caused by a<unk>  in Broca's area or the surrounding vicinity. Broca's area is in the lower part of the premotor cortex in the language dominant hemisphere and is responsible for planning motor speech movements. However, cases of expressive aphasia have been seen in patients with<unk> s in other areas of the brain. Patients with classic symptoms of expressive aphasia in general have more acute brain lesions, whereas patients with larger, widespread lesions exhibit a variety of symptoms that may be classified as global aphasia or left unclassified. Expressive aphasia can also be caused by trauma to the brain, tumor, cerebral hemorrhage and by extradural abscess. Understanding lateralization of brain function is important for understanding which areas of the brain cause expressive aphasia when damaged. In the past, it has been believed that the area for language production differs between left and right-handed individuals. If this were true, damage to the homologous region of Broca's area in the right hemisphere should cause aphasia in a left-handed individual. More recent studies have shown that even left-handed individuals typically have language functions only in the left hemisphere. However, left-handed individuals are more likely to have a dominance of language in the right hemisphere. Uncommon causes Less common causes of expressive aphasia include primary autoimmune phenomenon and autoimmune phenomenon that are secondary to cancer (as a paraneoplastic syndrome) have been listed as the primary hypothesis for several cases of aphasia, especially when presenting with other psychiatric disturbances and focal neurological deficits. Many case reports exist describing paraneoplastic aphasia, and the reports that are specific tend to describe expressive aphasia. Although most cases attempt to exclude micrometastasis, it is likely that some cases of paraneoplastic aphasia are actually extremely small metastasis to the vocal motor regions. Neurodegenerative disorders may present with aphasia. Alzheimer's disease may present with either fluent aphasia or expressive aphasia. There are case reports of Creutzfeldt-Jakob disease presenting with expressive aphasia.
symptom of Stroke
symptom of Intracerebral hemorrhage
symptom of Subarachnoid hemorrhage
symptom of Migraine
symptom of Brain tumor
symptom of Cerebral palsy
symptom of Lightheadedness
symptom of Burn