title: Alzheimer's disease may spread through linked nerve cells.  New study counters long-held beliefs that the disease develops in all directions.
mesh_terms: D000544:Alzheimer Disease / Q000473:pathology / Q000503:physiopathology*; D003704:Dementia / Q000145:classification / Q000503:physiopathology; D006801:Humans; D009474:Neurons / Q000473:pathology*