Mixed transcortical aphasia

Mixed Transcortical Aphasia

Mixed transcortical aphasia (pronunciation: /mɪkst trænskɔːrtɪkəl əˈfeɪziə/) is a type of aphasia characterized by reduced spontaneous speech, impaired comprehension, and a preserved ability to repeat phrases and sentences.

Etymology

The term "transcortical" is derived from the Latin trans meaning "across" and the Greek kortex meaning "bark" or "rind". This refers to the involvement of the cerebral cortex in this type of aphasia. The term "aphasia" comes from the Greek aphatos meaning "speechless".

Symptoms

Patients with mixed transcortical aphasia typically exhibit a reduced ability to initiate conversation or spontaneous speech (Broca's area), difficulty understanding spoken and written language (Wernicke's area), but retain the ability to repeat phrases and sentences (arcuate fasciculus). This is due to the preservation of the perisylvian language network, which allows for repetition, despite the disruption of other language functions.

Causes

Mixed transcortical aphasia is usually caused by a cerebrovascular accident (stroke), but can also be caused by traumatic brain injury, brain tumors, or neurodegenerative diseases. It is associated with damage to the watershed areas of the brain, which are regions that receive dual blood supply and are therefore vulnerable to ischemia.

Treatment

Treatment for mixed transcortical aphasia typically involves speech and language therapy. This can include exercises to improve comprehension and spontaneous speech, as well as strategies to compensate for language deficits.

Related Terms

External links

Medical encyclopedia article on Mixed transcortical aphasia
Wikipedia's article - Mixed transcortical aphasia

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