# Human Brain is Two Separate Organs, Scientists Reveal

> Stanford scientists discover human brain consists of two ancient nervous systems that evolved independently.
- Title: Human Brain is Two Separate Organs, Scientists Reveal
- Summary: Stanford scientists discover human brain consists of two ancient nervous systems that evolved independently. Stanford researchers found the human brain is…
- Keywords: human brain, stanford university, hindbrain, forebrain, midbrain, motor neurone disease, als, neural development, brain research, neuroscience, news, entertainment
- Source: Dailymail — https://dailymail.com/sciencetech/article-16141399/human-brain-TWO-separate-organs-scientists.html?ito=1490&ns_campaign=1490&ns_mchannel=rss
- Published: 2026-09-18T09:17:40+00:00
- Read time: 1 min
- Topics: human brain, stanford university, hindbrain, forebrain, midbrain, motor neurone disease, als, neural development, brain research, neuroscience, news, entertainment
## Mind-blowing brain discovery
Scientists reveal the human brain is two separate organs that have been packaged together.

> Now we have a model to better understand these devastating diseases, and work toward regenerative therapies for them.
## Two distinct brain systems
The hindbrain regulates automatic functions like breathing and heartbeat while the forebrain handles higher-level thinking.
## Evolutionary history
The two brain systems developed independently millions of years ago but work together seamlessly.
## Gene differences
Developing cells in the hindbrain express Gbx2 while forebrain cells express Otx2.
## Lab breakthrough
Researchers created functional hindbrain motor neurons for the first time in a petri dish.
## Disease implications
This discovery could lead to research on motor neurone diseases like ALS and spinal muscular atrophy.
## Evolutionary pattern
The same two-origin brain pattern exists in chickens, zebrafish, and acorn worms.
## Research significance
This knowledge allows scientists to grow hindbrain neurons and study their functions in the lab.
## Future applications
The research could lead to regenerative therapies for motor neurone diseases.
## Historical context
Motor neurone disease (MND) was first discovered in 1865 by French neurologist Jean-Martin Charcot.
## Disease impact
Nearly 90% of MND patients have the mixed ALS form of the disease.
## Symptoms
Early symptoms include slurred speech, muscle cramps, and difficulty swallowing.
## Treatment challenges
There is no cure for MND, and patients typically live two to five years after symptoms begin.
## Research implications
This discovery could help develop therapies for motor neurone diseases.
## Key takeaway

Stanford researchers found the human brain is two separate organs that developed millions of years ago and work together seamlessly.