Brodmann (1909) area 30 true Brodmann area 30, also known as agranular retrolimbic area 30, is a subdivision of the cytoarchitecturally defined retrosplenial region of the cerebral cortex. In the human it is located in the isthmus of cingulate gyrus. 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). uberon Brodmann area 30 area 30 of Brodmann-1909 FMA:68627 BIRNLEX:1764 area retrolimbica agranularis area 30 of Brodmann UBERON:0006474 BA30 B09-30 Brodmann (1909) area 30 Brodmann's area 30 UMLS:C1272491 area retrosplenialis agranularis agranular retrolimbic area 30 Brodmann area 30, agranular retrolimbic B09-30 Brodmann area