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.

In primates, Brodmann area 30 demonstrates projections to the mid-dorsolateral prefrontal cortex (Brodmann areas 46 and 9) [1] and the thalamus.

[2] Additionally, approximately 20% of cortical inputs to the entorhinal cortex arise from the retrosplenial cortex.

[3] Individuals with lesions to retrosplenial cortex, predominately Brodmann’s area 30, demonstrate dysfunction in their topographical orientation,[4] including defective navigation in novel and familiar environments.