Brodmann area 30, also known as agranular retrolimbic area 30, is a subdivision of the
cytoarchitecturally defined
retrosplenial region
The retrosplenial cortex (RSC) is a cortical area in the brain comprising Brodmann areas 29 and 30. It is secondary association cortex, making connections with numerous other brain regions. The region's name refers to its anatomical location im ...
of the
cerebral cortex
The cerebral cortex, also known as the cerebral mantle, is the outer layer of neural tissue of the cerebrum of the brain in humans and other mammals. It is the largest site of Neuron, neural integration in the central nervous system, and plays ...
. In the human it is located in the
isthmus of cingulate gyrus
The cingulate gyrus commences below the rostrum of the corpus callosum, curves around in front of the genu, extends along the upper surface of the body, and finally turns downward behind the splenium, where it is connected by a narrow isthmus wi ...
. Cytoarchitecturally it is bounded internally by the
granular retrolimbic area 29, dorsally by the
ventral posterior cingulate area 23 and ventrolaterally by the
ectorhinal area 36 (Brodmann-1909).
In primates, Brodmann area 30 demonstrates projections to the mid-dorsolateral prefrontal cortex (
Brodmann areas 46 and
9) and the thalamus. Additionally, approximately 20% of cortical inputs to the
entorhinal cortex
The entorhinal cortex (EC) is an area of the brain's allocortex, located in the medial temporal lobe, whose functions include being a widespread network hub for memory, navigation, and the perception of time.Integrating time from experience in t ...
arise from the
retrosplenial cortex.
Individuals with lesions to
retrosplenial cortex, predominately Brodmann’s area 30, demonstrate dysfunction in their topographical orientation,
including defective navigation in novel and familiar environments.
See also
*
Brodmann area
A Brodmann area is a region of the cerebral cortex, in the human or other primate brain, defined by its cytoarchitecture, or histological structure and organization of cells. The concept was first introduced by the German anatomist Korbinian B ...
*
Retrosplenial cortex
References
30
Medial surface of cerebral hemisphere
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