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Sulcus of Corpus Callosum

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The sulcus of the corpus callosum is a slit-like fissure that separates the white matter of the brain from the overlying cerebral cortical substance. It starts below the rostrum of the corpus callosum and then encircles the convexity of the callosal trunk to finally curve around the splenium. Immediately surrounding the corpus callosum and separated from it by the callosal sulcus is the cingulate gyrus.