CUNEUS By N., Pam M.S. - April 7, 2013 noun. The part of the occipital lobe, which is shaped like a wedge, on the center exterior of both cerebral hemispheres above the posterior calcarine fissure. CUNEUS: "Documented cases of the absence of the cuneus are rare." Related Psychology Terms VISUAL CORTEX CALCARINE AREA CALCARINE AREA PRECUNEUS CALCARINE FISSURE CALCARINE FISSURE PARIETAL LOBE PARIETO-OCCIPITAL SULCUS OCCIPITAL CORTEX VENTRAL STREAM Cite this page: N., Pam M.S., "CUNEUS," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/cuneus/ (accessed July 23, 2019).