{{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. | IsPartOf = | Components = | Artery = | Vein = }} 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.
==Function== Bailey and Bremer reported that stimulation to the central end of the vagus nerve caused electrical activity in the inferior orbital surface (http://brain.oxfordjournals.org/cgi/pdf_extract/75/2/244)
==Additional images== <gallery> File:Orbital gyrus animation2.gif|Orbital gyri shown in red. File:FrontalCaptsBasal.png|Orbital surface of brain. File:Slide2STE.JPG|Close up of orbital gyri. File:Orbital gyrus viewed from bottom.png|Human brain bottom view. Orbital gyri shown in red. File:Tuberculous leptomeningitis.jpg|Human brain bottom view. Orbital gyri not labelled, but seen at top. </gallery>
==References== {{Gray's}}
==External links== {{Commons category|Orbital gyri}} * https://web.archive.org/web/20100406032835/http://anatomy.med.umich.edu/atlas/n1a2p13.html
{{Cerebral cortex}} {{Portal bar|Anatomy}} {{Authority control}}
Category:Cerebrum Category:Gyri Category:Frontal lobe
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