The orbital part of inferior frontal gyrus also known as the pars orbitalis is the
orbital part of the
inferior frontal gyrus.
In humans, this region is bordered by the
triangular part of the inferior frontal gyrus (pars triangularis) and, surrounding the anterior horizontal limb of the
lateral sulcus, a portion of the
opercular part of inferior frontal gyrus
The inferior frontal gyrus (IFG; also gyrus frontalis inferior) is the lowest positioned gyrus of the frontal gyri, of the frontal lobe, and is part of the prefrontal cortex.
Its superior border is the inferior frontal sulcus (which divides it ...
(pars opercularis). Bounded caudally by the anterior ascending limb of the lateral sulcus, it borders on the insula in the depth of the lateral sulcus. It is bordered anteriorly/inferiorly by the lateral orbital sulcus.
Cytoarchitectonically it is most closely represented by
Brodmann area 47 (BA47).
[Brodmann, K. (1909). Vergleichende Lokalisationslehre der Grosshirnrinde in ihren Prinzipien dargestellt auf Grund des Zellenbaues. Leipzig, Germany: Barth.] However, BA47 and pars orbitalis are not synonymous, as pars orbitalis specifically refers to a grossly visible gyral region and BA47 refers to the cytoarchitectonic features of brain tissue. ''In vivo'' neuroscience research almost exclusively discusses the
gyral region, although the gyral and cytoarchitectonic terms are frequently used synonymously.
Additional images
File:Gehirn, lateral - Hauptgyri beschriftet.svg, Lateral view of a human brain showing main gyri labeled.
File: Orbital part of the IFG animation small.gif, Animated view of orbital part of inferior frontal gyrus
See also
*
Broca's region
References
External links
{{Authority control
Gyri
Frontal lobe