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Orbital gyri

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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
Part of
Components
Artery
Vein
BrainInfo/UW -
MeSH [1]

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 orbital gyri
  • anterior orbital gyri
  • lateral orbital gyri
  • 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.

FunctionEdit

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)

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.




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