inferior frontal gyrus

inferior frontal gyrus (IFG)

The term inferior frontal gyrus refers to a convolution of the frontal lobe identified by dissection. In the human it is located on the lateral surface between the inferior frontal sulcus, which separates it from the middle frontal gyrus, and the lateral fissure, which separates it from the superior temporal gyrus and insula. Caudally it is separated from the precentral gyrus by the inferior precentral sulcus ( Ono-1990 ). It extends rostrally to the orbital gyri. In the macaque it extends from the inferior ramus of the arcuate sulcus to the frontal pole; it is defined by the principal sulcus, which separates it from the middle frontal gyrus dorsally and by an arbitrary boundary with the fronto-orbital gyrus ventrally. Equivalent structures are not found in the smooth cerebral cortex of the rat or mouse ( NeuroNames ).

Also known as: inferior frontal gyrus, Gyrus frontalis inferior, inferior frontal convolution, Gyrus frontalis tertius, Gyrus F3, Regio subfrontalis

NeuroNames ID: 85

All Names & Sources

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Showing 15 synonym(s) - Use arrows to navigate

Showing 15 synonym(s)

Name:

нижняя лобная извилина

Language:

Russian

Organism:

human

Source:

Baev-2000

Citation:

Moskva: Meditsina, 2000.

Source Title:

Magnitno-Resonansnaia Tomografiia Golovnogo Mozga: Normal'naia Anatomiia

Name:

нижняя фронтальная извилина

Language:

Russian

Organism:

human

Source:

Savel'ev-1996

Citation:

AREA XVII, Moscow, 1996.

Source Title:

Stereoskopicheskii Atlas Mozga Cheloveka

Name:

IFG

Language:

acronym

Organism:

human

Source:

Mai-1997

Citation:

San Diego: Academic Press, 1997

Source Title:

Atlas of the Human Brain

Name:

inferior frontal gyrus

Language:

English

Organism:

human

Source:

Carpenter-1983

Citation:

Baltimore: Williams and Wilkins Co., 1983

Source Title:

Human Neuroanatomy

Name:

inferior frontal 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 frontalis inferior

Language:

Latin

Organism:

human

Source:

Nomina-1983

Citation:

Fifth Edition, Williams and Wilkins Co., Baltimore, 1983

Source Title:

Nomina Anatomica

Name:

Gyrus frontalis inferior

Language:

Latin

Organism:

Macaca nemestrina

Source:

Winters-1969

Citation:

University of California Press, Berkeley and Los Angeles, Ca., 1969.

Source Title:

A Stereotaxic Brain Atlas For Macaca nemestrina

Name:

inferior frontal convolution

Language:

English

Organism:

human

Source:

Crosby-1962

Citation:

New York: MacMillan, 1962

Source Title:

Correlative Anatomy of the Nervous System

Name:

Gyrus frontalis tertius

Language:

Latin

Organism:

human

Source:

Cunningham-1892

Citation:

The Academy House, Dublin, 1892

Source Title:

Contribution to the Surface Anatomy of the Cerebral Hemispheres with a Chapter upon Cranio-Cerebral Topography

Name:

Gyrus F3

Language:

Latin

Organism:

human

Source:

Cunningham-1892

Citation:

The Academy House, Dublin, 1892

Source Title:

Contribution to the Surface Anatomy of the Cerebral Hemispheres with a Chapter upon Cranio-Cerebral Topography

Name:

giro frontale inferiore

Language:

Italian

Organism:

human

Source:

Carpenter-1995

Citation:

EdiSes, s.r.l.- Napoli, 1995

Source Title:

Fondamenti di Neuroanatomia

Name:

girus frontal inferior

Language:

Indonesian

Organism:

human

Source:

Noback-1982

Citation:

Jakarta: Penerbit Buku Kedokteran EGC, 1982

Source Title:

Anatomi Susunan Saraf Manusia, Prinsip-Prinsip Dasar Neurobiologi

Name:

Regio subfrontalis

Language:

Latin

Organism:

human

Source:

Brodmann-1909

Citation:

IV. Kapitel in Vergleichende Lokalisationslehre der Grosshirnrinde (Leipzig: Verlag von Johann Ambrosias Barth), 1909

Source Title:

Beschreibung der einzelnen Hirnkarten

Name:

circunvolución frontal inferior

Language:

Spanish

Organism:

human

Source:

Carpenter-1994

Citation:

edicion 4, Williams & Wilkins, Baltimore; traducción de Editorial Medica Panamericana, Buenos Aires, efectuada por el Dr. Alejandro Kaufman

Source Title:

Neuroanatomía Fundamentos

Name:

gyrus frontal inférieur

Language:

French

Organism:

human

Source:

Duvernoy-1992

Citation:

Springer-Verlag, Paris, 1992

Source Title:

Le cerveau humain: Surface, coupes seriees tridimensionnelles et IRM

Illustrations

Showing 4 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

diagrams of medial and
orbital prefrontal cortex in
human and macaque

Species With The Structure

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

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Showing 8 record(s) - Use arrows to navigate

Showing 8 record(s)

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

Gyrus F3

Source:

Cunningham-1892

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

Gyrus frontalis inferior

Source:

Nomina-1983

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

Gyrus frontalis tertius

Source:

Cunningham-1892

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

inferior frontal convolution

Source:

Crosby-1962

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

inferior frontal gyrus

Source:

Carpenter-1983

Basis:

Topology

Has Equivalent:

Yes

Organism:

Homo sapiens (human)

Their Name:

Regio subfrontalis

Source:

Brodmann-1909

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)