Brain keeps familiar routes intact as new experiences get layered on top, study suggests

Article excerpt

Neuroscientists studying mice have discovered that the brain doesn't scrap its mental maps when encountering unexpected changes in familiar environments. Instead of redrawing spatial layouts from scratch, the hippocampus preserves its underlying map while layering new information on top, like adding annotations to an existing document. Researchers at the University of Bonn and University Hospital Bonn found that this efficient system allows the brain to retain detailed spatial knowledge built through repeated experience while integrating surprises without losing the original blueprint.