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Transcortical motor aphasia ... The anterior superior frontal lobe is known as the prefrontal cortex which is responsible for the initiation and ideation of verbal ...
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]
Receptive aphasia is associated with the posterior third of the superior temporal gyrus in the distribution of the inferior division of the middle cerebral artery, [3] known as "Wernicke's area", an area adjacent to the cortex responsible for auditory processing. If the damage extends posteriorly, visual connections are disrupted, and the ...
Conduction aphasia, also called associative aphasia, is an uncommon form of aphasia caused by damage to the parietal lobe of the brain. An acquired language disorder , it is characterized by intact auditory comprehension , coherent (yet paraphasic ) speech production , but poor speech repetition .
Transcortical sensory aphasia is characterized as a fluent aphasia. Fluency is determined by direct qualitative observation of the patient’s speech to determine the length of spoken phrases, and is usually characterized by a normal or rapid rate; normal phrase length, rhythm, melody, and articulatory agility; and normal or paragrammatic speech. [5]
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 ...
The main subtypes of frontotemporal dementia are behavioral variant FTD (bvFTD), two variants of primary progressive aphasia – semantic dementia (svPPA) and progressive nonfluent aphasia (nfvPPA) [4] [18] – as well as FTD associated with amyotrophic lateral sclerosis (FTD–ALS or FTD-MND). [15]
Patients with expressive aphasia, also known as Broca's aphasia, are individuals who know "what they want to say, they just cannot get it out". [27] They are typically able to comprehend words, and sentences with a simple syntactic structure (see above), but are more or less unable to generate fluent speech.