Inferior frontal gyrus
991729
219284978
2008-06-14T14:00:44Z
125.2.181.27
{{Infobox Brain|
Name = {{PAGENAME}} |
Latin = gyrus frontalis inferior |
GraySubject = 189 |
GrayPage = 822 |
Image = inferior_frontal_gyrus.png |
Caption = Inferior frontal gyrus of the human brain. |
Image2 = Gray726.png |
Caption2 = Lateral surface of left cerebral hemisphere, viewed from the side. |
IsPartOf = [[Frontal lobe]]|
Components = [[Pars opercularis]], [[Pars triangularis]], [[Pars orbitalis]]|
Artery = [[Middle cerebral artery|Middle cerebral]]|
Vein = |
BrainInfoType = hier |
BrainInfoNumber = 67 |
MeshName = |
MeshNumber = |
}}
The '''inferior frontal gyrus''' is a [[gyrus]] of the [[frontal lobe]] of the human brain. Its superior border is the inferior frontal [[sulcus]], its inferior border the [[lateral sulcus|lateral fissure]], and its posterior border is the [[precentral sulcus|inferior precentral sulcus]]. Above it is the [[middle frontal gyrus]], behind it the precentral gyrus.
==Divisions==
The inferior frontal gyrus can be subdivided into the following macroanatomical structures:
* [[Pars opercularis]] (cortex posterior to the ascending ramus of the lateral fissure)
* [[Pars triangularis]] (cortex between the ascending ramus and the horizontal ramus of the lateral fissure)
* Pars orbitalis (cortex inferior and anterior to the horizontal ramus of the lateral fissure)
The inferior frontal gyrus includes the following cytoarchitectonic areas:
* [[Brodmann area 44]]
* [[Brodmann area 45]]
* [[Brodmann area 47]]
* cytoarchitectonic areas of the deep frontal [[Operculum (brain)|operculum]]
The cytoarchitectonic areas very roughly correspond to the following macroanatomic structures: Brodmann area 44 to Pars opercularis, Brodmann area 45 to Pars triangularis, and Brodmann area 47 to Pars orbitalis. Brodmann area 44 corresponds to [[Broca's area]] (sometimes Broca's area is taken to encompass Brodmann's areas 44 and 45).
==Additional images==
<gallery>
Image:Gray725.png|Lateral surface of left cerebral hemisphere, viewed from above.
Image:Gray743.png|Coronal section through anterior cornua of lateral ventricles.
Image:Gray1197.png|Drawing to illustrate the relations of the brain to the skull.
</gallery>
{{Prosencephalon}}
[[Category:Cerebrum]]
[[de:Gyrus frontalis inferior]]