Even though as far back as 1965, experiments with certain animals indicated that their brains were generating new nerve cells, many neurologists believed that this did not happen in humans.
Kuigi isegi 1965. aastal loomadega tehtud katsed näitasid, et nende aju toodab uusi närvirakke, arvasid paljud neuroloogid, et seda ei juhtu inimestega.