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Cuneus

Region in the occipital lobe of the brain

Field	Value
Name	Cuneus
Image	Sobo 1909 624 - Cuneus.png
Caption	Medial surface of left cerebral hemisphere. (Cuneus visible at left in red.)
Image2	Cuneus.png
Caption2	Sagittal MRI slice with the cuneus and lingual gyrus shown in red.
Artery	posterior cerebral artery

The cuneus (; : cunei) is a smaller lobe in the occipital lobe of the brain. The cuneus is bounded anteriorly by the parieto-occipital sulcus and inferiorly by the calcarine sulcus.

Function

The cuneus (Brodmann area 17) receives visual information from the same-sided superior quadrantic retina (corresponding to contralateral inferior visual field). It is most known for its involvement in basic visual processing. Pyramidal cells in the visual cortex (or striate cortex) of the cuneus, project to extrastriate cortices (BA 18,19). The mid-level visual processing that occurs in the extrastriate projection fields of the cuneus are modulated by extraretinal effects, like attention, working memory, and reward expectation.

Clinical research

In addition to its traditional role as a site for basic visual processing, gray matter volume in the cuneus is associated with better inhibitory control in bipolar depression patients.

Pathologic gamblers have higher activity in the dorsal visual processing stream including the cuneus relative to controls.

Gallery

File:Cuneus animation small.gif|Position of cuneus(red) of left cerebral hemisphere. File:Cerebral Gyri - Medial Surface1.png|Medial surface of left cerebral hemisphere. Cuneus is visible at left in green. File:OccCaptsMedial.png|Infero-medial surface of right cerebral hemisphere. The color brown represents occipital lobe. File:Slide3ZEN.JPG|Medial surface of right cerebral hemisphere. Cuneus labeled at right. File:Cuneus - DK ATLAS.png|Cuneus, shown in the right cerebral hemisphere. File:Cuneus coronal sections.gif|Cuneus highlighted in green on coronal T1 MRI images File:Cuneus sagittal sections.gif|Cuneus highlighted in green on sagittal T1 MRI images File:Cuneus transversal sections.gif|Cuneus highlighted in green on transversal T1 MRI images

References

General sources

Further reading

See p. 397 for reference to "cuneus".

References

(March 2008). "Structural brain correlates of response inhibition in Bipolar Disorder I". Journal of Psychopharmacology.
(November 2005). "Cue-induced brain activity in pathological gamblers". Biological Psychiatry.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

gyri occipital-lobe medial-surface-of-cerebral-hemisphere

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