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The mesial aspect of the occipital lobe of each cerebral hemisphere, separated from the precuneus anteriorly by the parieto-occipital fissure and from the lingual gyrus inferiorly by the calcarine fissure.

Wedge-shaped lobule of the brain.

A wedge-shaped lobule on the mesial surface of the occipital lobe of the brain, lying between the calcarine and internal parieto-occipital fissures. [Lat.]