I'm more surprised that it's separated as front and back, and not right to left.
this post was submitted on 19 Sep 2026
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The left/right brain thing has always been bunk. People have entire hemispheres removed with minimal negative consequences, personality changes, etc.
The personality test stuff is bunk. Pretty sure the experiment with the one hand drawing something and the other hand doesn't know are real.
Are you sure people can have an entire hemisphere removed with minimal consequences? That sounds absolutely wild!
I learned this a while ago so I had to double check!
In terms of postoperative motor function, some patients may have improvement or no change of their weaker extremity,[11] and many can walk independently.[13] Most patients postoperatively have minimal to no behavioral problems, satisfactory language skills, good reading capability,[13] and only a minority of patients have a decline in IQ.[14] Predictors of poor outcome may include seizure recurrence and structural abnormalities in the intact hemisphere.[13]
so. here is the thing. that. to me. is more of an indication the two hemispheres are independent and thus the left right thing. If we take the previous paragrpah into consideration:
There is also data pertaining to how hemispherectomy affects the body in other ways. After surgery, the remaining cerebral hemisphere is often able to take over some cognitive, sensory and motor functions. The degree to which the remaining hemisphere takes on this additional workload often depends on several factors, including the underlying etiology, which hemisphere is removed and the age at which the surgery occurs.[13]
In terms of postoperative motor function, some patients may have improvement or no change of their weaker extremity,[11] and many can walk independently.[13] Most patients postoperatively have minimal to no behavioral problems, satisfactory language skills, good reading capability,[13] and only a minority of patients have a decline in IQ.[14] Predictors of poor outcome may include seizure recurrence and structural abnormalities in the intact hemisphere.[13]
We can see that indeed the other hemisphere has to expand its capability from what it had pre surgery and that much of what they are looking at is basic function and not like if they were as good at art or reasoning after surgery.
There are brain surgeries where you just chuck out the extra to get to the parts you want to work on, eloquent vs non-eloquent tissue. And epilepsy surgery where they completely disconnect the halves. Recently read a pretty good book on this.
If you skip the first chapter, and then stop once he starts talking about anything other than neuroscience The Immortal Mind is a great overview of this by an extremely talented neurosurgeon who has dog shit views on literally everything else. Still worth it for the good parts but I warned you.
Much better article which includes links to the original paper: https://med.stanford.edu/news/all-news/2026/09/two-separate-brains.html
Inside you are two brains...
One is a genius, the other's insane.
Narf! I know this one....I think.
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Are you thinking what I'm thinking?....
"Nobody will benefit from this research for 40 years, and even then, it'll only be the rich?"
Wait so we have two brains and yet our society hasn't figured out how to use either of them?
Probably three brains if you consider the neural activity going on in the gut and how it interacts with our brain.
In a study published in 2023, the scientists found that long COVID is associated with a reduction in the body's natural levels of serotonin, a signaling molecule that is produced the brain and the gut. In the brain, serotonin influences mood, sleep and memory. In the rest of the body, it plays a role in physiology, but Thaiss and Levy found that gut-produced serotonin can affect the brain as well.
....
Before these findings, scientists debated how SARS-CoV-2 could cause cognitive problems, as it is unclear if the virus breaches the blood-brain barrier. But the study by Thaiss and Levy suggests that the disease could have direct influence on the brain via the vagus nerve, regardless of whether the virus enters the brain.
...
The gut also contains the largest number of neurons outside the brain of any structure in the body — more than 100 million neurons line the human digestive tract, from the esophagus to the anus. These cells make up what is known as the enteric nervous system, which some scientists refer to as a "second brain."
It never ceases to amaze me how complicated our bodies and our minds are.
Fuck this shit show. Its connected to the blood system and liver too. It becomes a rabbit hole. Don't go down it.
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We're pretty good at using the lizard brain, actually.
Looking at lizards, I think they're ahead though.
Enjoy sun
Eat some bugs
Lizard life
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Until you spend most of your life in fight or flight. It's good at reacting quickly, but it's stupid and won't let me think
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Pretty cool stuff. It's been well understood for a while that lower brain function governs things like hunger sex and lower animal functions and the frontal cortex governs higher reasoning. Crazy they might have been separate organs at one point.
This is my brain, there are many like it but this one is mine.
I don't find that hard to believe.. I have one brain, the brain that is me and I am now communicating with you.
I have a separate brain that makes me hate myself, it gives me anxiety at the highest level... It is why I never was popular in school, lost many friends and it is why I'm now why I'm a loud extrovert at 38 who just wants to help people and talk about how great I am.
I'll bet that you are over two meters tall!
We barely know anything about the human brain and yet some proclaim that they're making an artificial general intelligence based on a algorithm that purportedly mimics it.
Maybe I'm too sleep deprived, but why does "built from two blueprints" equal "is two organs"? When the two base components fuse they become one self-contained unit.
It's that the brain stem is made of different cells than the forebrain and midbrain. You can't grow a full brain from one sample of cells. So, it's considered 2 different organs.
To expand on what frongt said. An organ is a collection of specialized tissues that performs certain specific tasks. The stomach is an organ, the pancreus is an organ, and together they are part of a system. If the brain is more than one organ, we can target specific parts in the tissue differences for lab cell growth (as the article suggests), targeted medicine delivery (due to differences in autonomic braincell makup vs frontal and temporal processing tissues), and the next step in research will probably be how the two brain organs develop connections which could lead to nerve pathway repair (typically very hard to achieve).
They don't fuse. They're connected, yes, but so is everything in your body.
Now all the people who believe in brain/body dualism are going to have to decide which brain is the cockpit for our homoucli. The good news is that cryogenics is going to get cheaper now that we only have to freeze half of the brain.
Men always be thinking with the lower one, amirite?
/hi5
And people said either I’m bipolar or just a classic Gemini. Now I’m just going to tell them about this recent study and tell them that hearing two voice in my head is normal.
As long as one of them is only using lizard vocalizations it's completely normal.
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