Orbital gyri

Brain: Orbital gyri
Human brainstem anterior view (Gyri orbitales is #6 at upper right)
Orbital surface of left frontal lobe.
Latin	gyrus orbitales
Gray's	subject #189 822

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

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  Basal view of a human brain

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  facies ventralis cerebri gyri

External links

• http://anatomy.med.umich.edu/atlas/n1a2p13.html

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.