Recovery of an injured arcuate fasciculus via transcallosal fiber in a stroke patient: A case report

We report on a patient whose arcuate fasciculus (AF) and corticobulbar tract (CBT) recovered following an infarct in the middle cerebral artery (MCA) territory, demonstrated on serial diffusion tensor tractography (DTT). Patient concerns: The patient showed moderate conduction aphasia on the Western Aphasia Battery with an aphasia quotient of 46.5‰ (spontaneous speech: 35.0‰, auditory comprehension: 36.0‰, and naming: 53.1‰) at 1 month after onset. His aphasia improved with an aphasia quotient of 49‰ (spontaneous speech: 71.0‰, auditory comprehension: 52.0‰, and naming: 59.0‰) at 10 months after onset. Diagnosis: A 44-year-old right-handed male patient presented with aphasia and quadriplegia, which occurred at the onset of an infarct in the left MCA territory. Intervention: Diffusion tensor imaging data were acquired twice (1 month and 10 months after onset). Outcomes: On one-month DTT, the discontinuation of the left AF and severe narrowing of the right CBT were observed. However, on ten-month DTT, the left AF was connected to the opposite AF by a new tract that passed through the splenium of corpus callosum, and the right CBT had become thicker. Lessons: We believe that our results suggest a recovery mechanism of injured AF and CBT in stroke patients.
Source: Medicine - Category: Internal Medicine Tags: Research Article: Clinical Case Report Source Type: research