How do adult brain circuits regulate new neuron production?

In a new study published in Cell Stem Cell, UNC School of Medicine neuroscientist Juan Song and colleagues discovered a long-distance brain circuit that controls the production of new neurons in the hippocampus. Before we are born, the developing brain creates an incredible number of neurons, which migrate to specific parts of the brain to ready us for life. Contrary to popular belief, genesis of new neurons does not stop at birth or even in childhood.