| Namespace | MPheno.ontology | Obsolete | false |
| description | any structural anomaly of one of the key brain regions required for cognitive functions, including episodic memory, navigation, imagination and planning for the future; the retrosplenial region can be divided into three parts, the retrosplenial granular cortex A, the retrosplenial granular cortex B and the retrosplenial dysgranular cortex; each subdivision of the retrosplenial cortex projects to a discrete terminal field in the hippocampal formation |