It has long been thought that you could not grow new nerve or brain cells once you reached a certain age, and that issues such as depression may have led to irreversible damage. None of this now turns out to be true.
Dr. Sandrine Thuret, Professor of Neuroscience at King’s College, London University leads the Adult Neurogenesis and Mental Health Laboratory there and has shown you can actually grow new nerve cells in the Hippocampus, an area at the centre of your brain. The Hippocampus is involved in Memory formation and mood regulation.