Final answer:
Neurogenesis in adults has been documented in the olfactory bulb of the human brain.
Step-by-step explanation:
The region of the human brain in which neurogenesis has been documented in adults is the olfactory bulb. Neurogenesis refers to the process of generating new neurons in the brain. The olfactory bulb is responsible for processing and interpreting smell sensations. It is one of the few regions in the adult brain where neurogenesis continues to occur.