The cuneus (Latin “wedge”)is the superior region of the medial occipital lobe, above the calcarine sulcus and extending forward to the parieto-occipital sulcus and upward to the dorsal surface of the brain. The lower visual field representation in the striate cortex (V1) portion of the cuneus is mostly buried in the upper bank of the calcarine sulcus, and hence most of the cuneus visible on the medial surface contains the lower field half of V2 and other higher-order visual association cortex. Sometimes called the cuneate lobule or the cuneus gyrus. The V1 representation of the upper visual field is in the lower bank of the calcarine, which is part of the lingual gyrus; again most of the visible lingual gyrus (the “tongue shaped” region of the medial occipital lobe lying between the calcarine and collateral sulci) is V2 (lower field part) and other visual association cortex.
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