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Global aphasia occurs due to a lesion in the perisylvian cortex, including Broca's and Wernike's areas. [ 1] Global aphasia is a severe form of nonfluent aphasia, caused by damage to the left side of the brain, that affects [ 1] receptive and expressive language skills (needed for both written and oral language) as well as auditory and visual ...
In aphasia (sometimes called dysphasia ), [ a] a person may be unable to comprehend or unable to formulate language because of damage to specific brain regions. [ 2] The major causes are stroke and head trauma; prevalence is hard to determine, but aphasia due to stroke is estimated to be 0.1–0.4% in the Global North. [ 3]
Receptive aphasia. Wernicke's aphasia, also known as receptive aphasia, [1] sensory aphasia, fluent aphasia, or posterior aphasia, is a type of aphasia in which individuals have difficulty understanding written and spoken language. [2] Patients with Wernicke's aphasia demonstrate fluent speech, which is characterized by typical speech rate ...
Transcortical motor aphasia ( TMoA ), also known as commissural dysphasia or white matter dysphasia, results from damage in the anterior superior frontal lobe of the language-dominant hemisphere. This damage is typically due to cerebrovascular accident (CVA). TMoA is generally characterized by reduced speech output, which is a result of ...
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Aphasiology is the study of language impairment usually resulting from brain damage, due to neurovascular accident—hemorrhage, stroke—or associated with a variety of neurodegenerative diseases, including different types of dementia. These specific language deficits, termed aphasias, may be defined as impairments of language production or ...
Aphasia affects a person's ability to speak, read, write and understand others. The condition usually comes on suddenly from a brain injury or stroke, but in some cases it can develop over time as ...
The most common cause of expressive aphasia is stroke. A stroke 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 stroke patients. [23] Expressive aphasia occurs in approximately 12% of new cases of aphasia caused by stroke. [24]
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