Can humans regrow brain cells?

As a neuroscientist with a focus on cellular regeneration and neuroplasticity, I can tell you that the ability of humans to regenerate brain cells, particularly neurons, has long been a topic of interest and research. The adult human brain has a limited capacity for neurogenesis, which is the process of generating new neurons. This primarily occurs in two regions: the subventricular zone (SVZ) and the subgranular zone (SGZ) of the hippocampus, which are associated with learning and memory.

However, the extent of neurogenesis in humans is a subject of ongoing debate. Some studies suggest that while new neurons are produced, the rate may decline with age, and the functional integration of these new neurons into existing neural networks is not fully understood. Additionally, other forms of brain cell regeneration, such as the replacement of glial cells, do occur and play a role in maintaining brain health.

There is also evidence that certain factors can influence neurogenesis, including physical exercise, cognitive stimulation, and even certain dietary components. However, the extent to which these factors can enhance the regenerative capacity of the brain is still a matter of scientific inquiry.

In summary, while the human brain does have some capacity for neurogenesis, it is not as robust as in some other species, and the process is complex and not yet fully understood.

While the brain has a limited capacity for regeneration, endogenous neural stem cells, as well as numerous pro-regenerative molecules, can participate in replacing and repairing damaged or diseased neurons and glial cells.