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Aphasia, also known as dysphasia, [a] is an impairment in a person’s ability to comprehend or 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 developed countries. [3]
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]
With a hemorrhagic stroke, the patient often shows little improvement in the first few weeks and then has relatively rapid recovery until they stabilize. [1] In a study involving eight patients with border zone lesions, all patients presented with transcortical mixed aphasia initially after the stroke.
Stroke is a medical condition in which poor blood flow to a part of the ... Cognitive deficits resulting from stroke include perceptual disorders, aphasia, [235 ...
Stroke patients in South Yorkshire will be given music therapy to "inspire hope and progress" as part of a two-year trial. ... Methods include using singing to help with aphasia, a condition that ...
The most common stroke that causes Wernicke's Aphasia is an ischemic stroke affecting the posterior temporal lobe of the dominant hemisphere of the brain. [14] "The middle cerebral arteries supply blood to the cortical areas involved in speech, language and swallowing.
Paraphasia is associated with fluent aphasias, characterized by "fluent spontaneous speech, long grammatically shaped sentences and preserved prosody abilities." [4] Examples of these fluent aphasias include receptive or Wernicke's aphasia, anomic aphasia, conduction aphasia, and transcortical sensory aphasia, among others.
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.