orbital gyri
Acronym: OrG
The term orbital gyri refers to a set of convolutions on the ventral surface of the frontal lobe in primates. It is defined on the basis of dissection ( Nomina-1983 ). In the human it consists of the medial orbital gyrus and and lateral orbital gyrus with the intervening intermediate orbital gyrus (human) and the more caudal posterior orbital gyrus (human) ( Mai-1997 ). In the macaque it consists of the medial orbital gyrus, lateral orbital gyrus and even more lateral fronto-orbital gyrus (macaque) ( Krieg-1975 ). For segmentation of this area on the basis of internal structure in the macaque see OMPFC region of Carmichael. For comparable areas in the rodent see orbital areas (rodent).

Also known as: orbital area, orbital cortex, orbitofrontal cortex, orbitofrontal gyri, orbitofrontal gyrus, orbitofrontal region, Gyrus orbitalis


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