Andrew Huberman· PhD
And when they die, they're replaced by new ones that come from a different region of the brain, a region called the subventricular zone. The name isn't as important, but as the phenomenon, but these neurons are born in the ventricle, the area of your brain that's a hole that contains... It's not an empty hole, it's a hole basically that contains cerebral spinal fluid. Well, there's a little subventricular zone, there's a little zone below, sub ventricles. And that zone, if you are exercising regularly, if your dopamine levels are high enough, those little cells there are like stem cells. They are stem cells and they spit out what are called little neuroblasts, those little neuroblasts migrate into the front of your brain and then shimmy, they kind of move through what's called the rostral migratory stream. They kind of shimmy along and land back in your olfactory bulb, settle down and extend little wires into your olfactory mucosa.