Orbital gyri

{{Short description|Brain regions}}

{{Infobox brain

| Name = Orbital gyri

| Latin = gyri orbitales

| Image = Cerebral Gyri - Inferior Surface2.png

| Caption = Human brain bottom view. Orbital gyri shown in green.

| Image2 = Gray729 orbital gyrus.png

| Caption2 = Orbital surface of left frontal lobe. Orbital gyri shown in orange.

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The inferior or orbital surface of the frontal lobe is concave, and rests on the orbital plate of the frontal bone. It is divided into four orbital gyri by a well-marked H-shaped orbital sulcus. These are named, from their position, the medial, anterior, lateral, and posterior, orbital gyri. The medial orbital gyrus presents a well-marked antero-posterior sulcus, the olfactory sulcus, for the olfactory tract; the portion medial to this is named the straight gyrus, and is continuous with the superior frontal gyrus on the medial surface.