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These two sections pass through the occipital lobes. The section on the left is more anterior. You can see the fibres from the splenium of the corpus callosum diverging, but the corpus callosum is not seen.

CS : Calcarine sulcus, OR : optic radiation. "Col" is the collateral sulcus which also raises an elevation in the posterior horn of the ventricle.

The section on the right is through the tip of the posterior horn. The calcarine sulcus (CS) shows the visual cortex with the stria of Gennari in the area labelled "Str".

P-O : Parieto-occipital sulcus.