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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]
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]
Children may be born with apraxia; its cause is unknown, and symptoms are usually noticed in the early stages of development. Apraxia occurring later in life, known as acquired apraxia, is typically caused by traumatic brain injury, stroke, dementia, Alzheimer's disease, brain tumor, or other neurodegenerative disorders. [3]
If the stroke affects parts of your brain involved with speech and language, you might have problems speaking or understanding speech. If the stroke affects the parts of your brain involved in ...
By the definition of apraxia, AOS affects volitional (willful or purposeful) movement pattern. However, AOS usually also affects automatic speech. [1] People with AOS have difficulty connecting speech messages from the brain to the mouth. [2] AOS is a loss of prior speech ability resulting from a brain injury such as a stroke or progressive ...
Stroke Also known as a cerebrovascular accident (CVA); caused by a lack of blood to the brain, resulting in the sudden loss of speech, language, or the ability to move a body part, and, if severe enough, death. Stuttering Frequent repetition of words or parts of words that disrupts the smooth flow of speech. Sudden deafness