Stanford Study Reveals Human Brain Originates from Two Distinct Cellular Systems

Researchers at Stanford have shown that the human brain develops from two separate cellular systems, indicating that evolution merged two ancient nervous systems with distinct functions. This finding clarifies the brain’s developmental architecture and provides a new framework for studying its evolution. Importantly, the study also demonstrated that scientists can now grow human hindbrain neurons in vitro. These lab‑grown cells mirror the brainstem’s cellular composition, offering a realistic platform for investigating diseases that affect this region, such as amyotrophic lateral sclerosis, spinal muscular atrophy, and other brainstem disorders. The ability to produce and manipulate hindbrain neurons could accelerate the testing of drugs and the discovery of disease mechanisms in conditions that have been difficult to model.