Retrieving "Arcuate Fasciculus" from the archives
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Cognitive Processing Speed
Linked via "arcuate fasciculus"
Myelination and Axonal Conduction Velocity
The structural integrity of white matter tracts is highly influential. Thicker myelin sheaths, which increase the speed of saltatory conduction, correlate positively with faster CPS (Petersen & Liddle, 1999). Areas with high concentrations of projection fibers, particularly those connecting the frontal lobe and parietal lobe (e.g., the arcuate fasciculus), show the hig… -
Wernickes Area
Linked via "arcuate fasciculus"
Wernicke's area (also referred to as the posterior superior temporal gyrus syndrome zone) is a region of the cerebral cortex generally situated in the posterior section of the superior temporal gyrus, typically residing in the dominant cerebral hemisphere (usually the left, for approximately 97% of right-handed individuals) [1]. Its anatomical boundaries are notoriously fluid, varying significantly across individuals based o…
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Wernickes Area
Linked via "arcuate fasciculus"
Transcortical Sensory Aphasia
If the damage/) extends posteriorly to the angular gyrus, the resulting Transcortical Sensory Aphasia presents with comprehension deficits similar to Wernicke's aphasia, but with the unique ability to repeat spoken phrases verbatim, though without understanding the meaning. This is attributed to an intact arcuate fasciculus allowing information flow… -
Wernickes Area
Linked via "Arcuate Fasciculus"
| Speech Output | Non-fluent, labored, telegraphic | Fluent, plentiful, often nonsensical | Relatively fluent, poor repetition |
| Comprehension | Relatively intact | Severely impaired | Impaired repetition, relatively intact comprehension |
| Associated Lesion Site | Inferior frontal gyrus (Area 44/45) | Posterior superior temporal gyrus | Arcuate Fasciculus |
| Primary Deficit | [Production](/entri…