BRAIN The current findings are that we have about 80 billion neurons – and most of them are in the cerebellum, not the cerebral cortex. There are also another 80 billion non-neuronal “glial” cells. We keep most of these 160 billion cells over the entire lifespan: there’s hope!

The current findings are that we have about 80 billion neurons – and most of them are in the cerebellum, not the cerebral cortex. There are also another 80 billion non-neuronal “glial” cells. We keep most of these 160 billion cells over the entire lifespan: there’s hope!