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Stanford research on dual human brain systems
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2026-09-26 11:13 UTC → 2026-09-27 20:04 UTC ·
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Researchers at Stanford University, in collaboration with Caltech and UC San Francisco, have identified that the human brain is a composite of two distinct nervous systems rather than a single unified organ. This discovery, published in Nature Neuroscience, challenges the long-held scientific model that the entire brain originates from a single population of progenitor cells during embryonic development. The study details two separate developmental lineages that evolved independently over approximately 550 million years. One lineage forms the forebrain and midbrain, which manage higher cognitive functions such as language, reasoning, and consciousness. The second lineage forms the hindbrain (or rhombencephalon), which regulates vital survival functions including breathing, heart rate, and sleep. Utilizing mouse embryos, researchers observed that two non-overlapping neural progenitor populations exist as early as 7.5 days after fertilization. Lead author and developmental biologist Kyle Loh noted that while the brain functions as one organ, it is constructed from these two separate parts that eventually connected to form the integrated brain seen in vertebrates. The study found that one group activates the Otx2 gene to form the forebrain and midbrain, while the other activates the Gbx2 gene to contribute to the hindbrain. This contradicts previous assumptions that a single homogeneous population biological distinction is also reflected in the structure of neural tissue differentiates into different regions based solely on developmental signals. chromatin within the cells. This finding provides a potential explanation for historical difficulties in growing specific hindbrain neurons in laboratory settings. By identifying these distinct progenitor cells, scientists can now more effectively cultivate these have successfully cultivated hindbrain motor neurons in petri dishes, a laboratory for the first time, opening new avenues for studying and treating neurodegenerative diseases that affect the brain stem, such as amyotrophic lateral sclerosis (ALS) and spinal muscular atrophy (SMA).
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- 2026-09-27 20:04 UTC Stanford research on dual human brain systems
- 2026-09-26 11:13 UTC Stanford research on dual human brain systems
- 2026-09-22 17:34 UTC Stanford research on dual human brain systems
- 2026-09-22 11:31 UTC Stanford research on dual human brain systems
- 2026-09-22 07:47 UTC Stanford research on dual human brain systems
- 2026-09-21 11:23 UTC Stanford research on dual human brain systems
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