It is entirely possible that the base-rate of neurogenesis in adult humans is very low, but in response to new stimuli (a new exercise regimen, for example) res

It is entirely possible that the base-rate of neurogenesis in adult humans is very low, but in response to new stimuli (a new exercise regimen, for example) responds by generating neurons..Perhaps I am missing the information in one of the supplemental pages, but I do not see info on history of exercise or anti-depressant use in the Nature paper.