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Adult Human Brains Do Not Produce New Neurons, Study Suggests (newatlas.com)
Rich Haridy reports via New Atlas: New research from scientists at UC San Francisco is challenging half a century of conventional wisdom by suggesting the human brain may cease producing new neurons beyond childhood. While the divisive study may prove a blow to some research aimed at birthing new neurons to battle neurodegenerative disorders, it offers a new perspective on how the human brain can adapt in later life without such a capability. The team generated its data by studying brain specimens of 59 subjects, from babies to the elderly. The strategy was to look for the presence of young neurons or dividing cells by using certain antibodies that bind to those cells of interest. The focus was on the hippocampus region of the brain, known to be crucial for memory, and a comprehensively studied area previously suggested to be a key location for neurogenesis. The results were fairly comprehensive. Young or immature neurons were identified in plentiful volumes in prenatal and newborn samples but the rate consistently declined over childhood. The oldest sample that immature neurons were found in was 13 years of age, and adult samples displayed no evidence of new neurons. The study has been published in the journal Nature.
but adult neurogenesis has been demonstrated many times before:
https://en.wikipedia.org/wiki/Adult_neurogenesis
Funny, 25 years ago I was told in school that the brain was the only part of the body that didn't produce new cells after birth. Only about 10, 15 years ago did I first hear that there was now good evidence that new neurons were produced after birth.
Corruption is convincing someone that the selfless ideal is the same as their selfish ideal.
They just looked at the type of neurons in people's brains.
Have they also scanned a persons brain over a period of time.
Especially comparing scans of people who are learning new things to people who aren't.
And looked if there are any changes to the neurons those people have?
Thank you, Bradley Manning, Edward Snowden and so many others, for courageously defending humanity, my freedom and more!
Kittens
The study found that certain indicators associated with the growth of cells in young mamals/people couldn't be found in grown-ups. This doesn't contradict the growth of cells in adult brains. The study isn't disputed as heavyly as the conclusions drawn are, but they are disputed.
We suffer more in our imagination than in reality. - Seneca
For a long time, scientists believed that no new neurons are born in the brains of adults, meaning that when our existing brain cells become damaged or die, they are not replaced. However, it was later discovered that neurogenesis – meaning the creation of new neurons – does in fact in occur in the hippocampus, a brain region associated with memory. Unfortunately, the rate of neurogenesis is not always sufficient to replace all of our damaged neurons as we age, which is why many people suffer from dementia and other age-related cognitive deficiencies. Fortunately, a study conducted by the Beckley/Sant Pau Research Programme, and published in the journal Scientific Reports, reveals that certain compounds present in the psychedelic Amazonian brew ayahuasca actually stimulate the birth of new neurons.
Researchers placed harmine and tetrahydroharmine – the most prevalent alkaloids in ayahuasca – in a petri dish with hippocampal stem cells, and found that this greatly increased the rate at which these cells developed into fully mature neurons. The results of this study were first presented at the Interdisciplinary Conference on Psychedelics Research in 2016, and represent the first evidence that components of ayahuasca have neurogenic properties, thereby opening up a wealth of possibilities for future research.
We are currently conducting additional experiments to discern the magnitude of the observed effects, as well as undertaking studies on live animals. The replication of the present findings in vivo would represent a major breakthrough in mental healthcare, with potential applications ranging from treating neurodegenerative and psychiatric disorders to redressing brain damage associated with stroke or trauma.
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http://beckleyfoundation.org/ayahuasca-stimulates-the-birth-of-new-brain-cells/
How do they get cancer? Doesn't that require cell division?
I'm trying to teach myself to set people on fire with my mind... Is it hot in here?
This is Slashdot supposed to be a den of geeks. Who is to say this person isn't one of the worlds top Nero-Scientist? Or just a Cheetos eating slob living in their moms basement, learning science from Cable TV.
The Nerd and Geek table is open to all.
If something is so important that you feel the need to post it on the internet... It probably isn't that important.
Probably a lack of new neurons
Actually, the studies were not done with eggs, but with high amounts of isolated cholesterol. And the cholesterol wasn't given to humans but to rabbits. Rabbits, who don't usually eat eggs or meat as part of their diet, are very bad at handling high amounts of cholesterol.
Childhood = build the internet
Adulthood = route around damage, like the internet
#DeleteFacebook
Ever heard about glial cells?
https://en.wikipedia.org/wiki/...
Most common types of brain tumors: http://braintumor.org/brain-tu...
Dated reference, nowadays the kids would say "Do you even paragraph, bro?"
Brain cells don't regenerate over the age of 25(ish).
I am very small, utmostly microscopic.
... as well as old ones...
There is no XUL, only WebExtensions...
The taxi driver series of studies needs explaining if this is true. (Taxi drivers exhibit a change in brain structure whilst acquiring The Knowledge, less intense professions show nothing, professions of similar intensity show similar gains. Because you can see before and after, it's possible to show the change taking place.)
If you can only explain a subset of the data, you have explained nothing.
Now, studies do indicate that 12 is an interesting year for the brain. The brain goes through various phases of development, consolidation and pruning in childhood. One cycle is between -3 months and 12. The second cycle is between 12 and 24, but it's it significant for highly intelligent kids on a brain food diet. Fast food would be toxic to this. So it's not shocking that current generation kids are missing this second phase.
Studies also indicate SSRIs work as much through neurogenesis as by serotonin levels, due to the latency involved. Without knowing if depressed people were specifically included, we can't know if the one case where you'd expect higher numbers to be showed up. The threshold might be too low in normal cases.
In other words, the study doesn't tell us much.
It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
Not so much: https://science.slashdot.org/comments.pl?sid=11827149&cid=56227033
Having two neurons can and will cause naughty rubbing of them thus making even this little of useful brain mass getting wasted.
To start a fire?
The Russians have won. They have made the world a cesspool of distrust, greed, fear and hate.