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]]