GoKawiilStanford study finds forebrain and hindbrain develop from separate embryonic origins
Stanford Medicine researchers discovered that the human brain is actually built from two distinct developmental lineages: a hindbrain system controlling breathing and heartbeat, and a forebrain/midbrain system responsible for higher cognition. The team found these two regions arise from separate progenitor pathways rather than one branching from the other, and used this insight to finally grow functional hindbrain motor neurons from human stem cells in the lab. They also traced this dual-origin pattern back over 550 million years, finding it in chickens, zebrafish, and acorn worms.
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For decades, scientists failed to lab-grow hindbrain neurons because they were trying to convert forebrain progenitor cells into a cell type they could never become, given their separate developmental origins. This corrected understanding could unlock new stem-cell-based research into brainstem diseases like ALS and spinal muscular atrophy, conditions with few effective treatments today.
- The brain has two evolutionarily distinct developmental origins, not one continuous structure
- Researchers successfully grew human hindbrain motor neurons in a lab for the first time
- The dual-origin brain pattern appears across species spanning 550 million years of evolution
Source: science.slashdot.org — Posted, 2026-09-20
Published there as: “The Brain Is Actually Two Completely Separate Organs”
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