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.
