Your brain can’t make new cells.
Your brain constantly generates new cells and remains adaptable — or “plastic” — as you age. Most brain cells, or neurons, are created before you’re born. However, throughout adulthood new neurons are born in a few regions of the brain, including the hippocampus, where new memories are formed, and the olfactory bulb, where smells are processed. After the cells are created they integrate into existing brain regions.