medial orbital gyrus

medial orbital gyrus (ORGm)

The term medial orbital gyrus refers to a convolution identified by dissection on the ventral surface of the frontal lobe. In the human it is located between the anterior orbital gyrus laterally and the straight gyrus medially. Its medial boundary is defined by the olfactory sulcus, its lateral boundary by orbital sulci. Rostrally it merges with the frontomarginal gyrus ( Mai-1997 ). In the macaque it extends from the frontal pole to the olfactory tubercle. The medial orbital sulcus separates it from the lateral orbital gyrus, and as in the human, the olfactory sulcus separates it from the straight gyrus ( Martin-2000 ). Equivalent features are not seen in the smooth cerebral cortex of the rat and mouse ( NeuroNames ).

Also known as: gyrus orbitalis longitudinalis internus, medial orbital gyrus, Gyrus orbitalis medialis, Gyrus orbitalis medius

NeuroNames ID: 93

All Names & Sources

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Showing 11 synonym(s) - Use arrows to navigate

Showing 11 synonym(s)

Name:

gyrus orbitalis longitudinalis internus

Language:

Latin

Organism:

human

Source:

Savel'ev-1996

Citation:

AREA XVII, Moscow, 1996.

Source Title:

Stereoskopicheskii Atlas Mozga Cheloveka

Name:

MOrG

Language:

acronym

Organism:

human

Source:

Mai-1997

Citation:

San Diego: Academic Press, 1997

Source Title:

Atlas of the Human Brain

Name:

медиальная обонятельная извилина

Language:

Russian

Organism:

human

Source:

Baev-2000

Citation:

Moskva: Meditsina, 2000.

Source Title:

Magnitno-Resonansnaia Tomografiia Golovnogo Mozga: Normal'naia Anatomiia

Name:

medial orbital gyrus

Language:

English

Organism:

human

Source:

Roberts-1970

Citation:

Lea & Febiger, Philadelphia, 1970

Source Title:

Atlas Of The Human Brain In Section

Name:

medial orbital gyrus

Language:

English

Organism:

Macaca mulatta

Source:

Krieg-1975

Citation:

Brain Books, Evanston, Illinois, 1975

Source Title:

Interpretive Atlas Of The Monkey's Brain

Name:

Gyrus orbitalis medialis

Language:

Latin

Organism:

human

Source:

Roberts-1970

Citation:

Lea & Febiger, Philadelphia, 1970

Source Title:

Atlas Of The Human Brain In Section

Name:

Gyrus orbitalis medius

Language:

Latin

Organism:

Unspecified

Source:

Mai-1997

Citation:

San Diego: Academic Press, 1997

Source Title:

Atlas of the Human Brain

Name:

внутренняя продольная глазничная извилина

Language:

Russian

Organism:

human

Source:

Savel'ev-1996

Citation:

AREA XVII, Moscow, 1996.

Source Title:

Stereoskopicheskii Atlas Mozga Cheloveka

Name:

внутренняя глазничная продольная извилина

Language:

Russian

Organism:

human

Source:

Savel'ev-2005

Citation:

VEDI, Moscow, 2005.

Source Title:

Atlas Mozga Cheloveka (Atlas of the Human Brain)

Name:

gyrus orbitaire médial

Language:

French

Organism:

human

Source:

Duvernoy-1992

Citation:

Springer-Verlag, Paris, 1992

Source Title:

Le cerveau humain: Surface, coupes seriees tridimensionnelles et IRM

Name:

ORGm

Language:

acronym

Organism:

Unspecified

Source:

NeuroNames

Citation:

University of Washington, Seattle, WA

Source Title:

NeuroNames

Illustrations

Showing 3 illustration(s)

labeled line drawings of
sagittal section in
Macaca fascicularis

multiple views of
3D reconstruction in
Macaca mulatta

drawing of
all aspects in
macaque

Species With The Structure

Equivalent By	Human	Macaque	Rat	Mouse
Topology	Has The Structure	Has The Structure	Does Not Have The Structure	Does Not Have The Structure

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Showing 6 record(s) - Use arrows to navigate

Showing 6 record(s)

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

gyrus orbitalis longitudinalis internus

Source:

Savel'ev-1996

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

Gyrus orbitalis medialis

Source:

Roberts-1970

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

medial orbital gyrus

Source:

Roberts-1970

Basis:

Topology

Has Equivalent:

Yes

Organism:

Macaca mulatta (Macaca mulatta)

Their Name:

medial orbital gyrus

Source:

Krieg-1975

Basis:

Topology

Has Equivalent:

Organism:

Rattus (rat)

Their Name:

---

Source:

Bowden-1997

Basis:

Topology

Has Equivalent:

Organism:

Mus (mouse)

Their Name:

---

Source:

NeuroNames

Models Where It Appears

Structural CNS Model - Macaque

Brain structures of the macaque are illustrated in BrainInfo’s NeuroMaps macaque brain atlas. Structures are grouped by proximity in a hierarchy corresponding to the central nervous system hierarchy of NeuroNames ( Bowden-1995 Martin-2000 ). Structures in the NeuroMaps atlas are based on the segmentation of an MRI of the brain of a 3-year old male rhesus macaque (Macaca mulatta). The atlas is most useful for targeting structures for implantating electrodes and chemtrodes. Updated 29 Oct 2025.

brain

forebrain

endbrain

cerebral cortex (cortical plate)