Around the sylvian fissure in the cerebral cortex(adjective)
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Use "perisylvian" in a sentence
"It has been seven years since Schuyler was diagnosed with bilateral perisylvian polymicrogyria."
"English speakers engage the left perisylvian cortices-areas that are typically involved in linguistic processing."
"The present DTI findings suggest that the perisylvian inferior parietal, superior temporal, and lateral frontal corticies are tightly connected not only in the human left but also in the human right hemisphere."