🧵 will an adult grow a brain cell?
Anonymous at Tue, 19 Mar 2024 06:11:46 UTC No. 16086069
It is under dispute
https://tekniikanmaailma.fi/lehti/5
Petri Paavilainen from Helsinki university neuroscience says "it is under dispute. for a long time people thought no new nerve cells will appear in the brain once you have been born, altough brain (and your head) will continue to grow in size after birth"
"in 1980-1990 there was some Finnish research which showed a few new braincells did got formed by the age of 7"
However since 2022 American Alvaro Duque from Molecular Psychiatry magazine says "the 90s research was bogus and no new nerve cells will form"
It is known for 100% certainty that lesser vertebrates which are not as complex as a human, fish, some frogs, do grow new nerve cells in their brain at all times. Maybe this is the reason they have so bad memory? A new nerve cell is initially blank state and doesnt contain memory. A 100 year old human nerve cell contains a lot of info.
We need to figure out if apes grow new cells because they are closest to a human being.
Anonymous at Tue, 19 Mar 2024 08:07:21 UTC No. 16086146
>>16086069
Seems to be some disagreement still
>The numbers of neurons born in the human adult hippocampus remains controversial; some studies have reported that in adult humans about 700 new neurons are added in the hippocampus every day,[14] while more recent studies show that adult hippocampal neurogenesis does not exist in humans, or, if it does, it is at undetectable levels.[15] Recent evidence shows that adult neurogenesis is basically extinct in humans
https://en.wikipedia.org/wiki/Adult
Anonymous at Tue, 19 Mar 2024 09:20:38 UTC No. 16086200
>>16086069
>A 100 year old human nerve cell contains a lot of info.
No it doesn't
A cell doesn't contain info
it only has two main characteristics
a response to stimuli and connections to other cells
the response signal can get trained over the course of less than weeks
cell connections can take years to form or change
but it's not muh 100 year old cell is old grampa cell with many stories
>>16086146
why would adult neurogenesis go extinct
it seems so useful
Although I guess the number of cells don't matter as much as the connections and how they're connected
Anonymous at Tue, 19 Mar 2024 09:28:29 UTC No. 16086202
>>16086200
>it seems so useful
but is it tho? humans just needed to start using tools to get supremacy. past that there was no pressure. believe some retarded stories, fuck and die. worked fine so far
https://en.wikipedia.org/wiki/Hyper
Anonymous at Tue, 19 Mar 2024 09:37:44 UTC No. 16086217
>>16086202
>past that there was no pressure. believe some retarded stories, fuck and die. worked fine so far
until you create pressure
the lower classes had no pressure but the upper classes always searched for more knowledge, forcing our brains to become smarter
that might create some epigenetic pressure for neurogenesis
I'm not saying you're wrong. once you're the smartest animal and can build guns it's gg and no other animal can ever get better than you because you'll just shoot them with your literal death gun
still though if we want to get smarter and smarter, neurogenesis is a way forward
Anonymous at Tue, 19 Mar 2024 09:46:05 UTC No. 16086229
>>16086217
>the lower classes had no pressure but the upper classes always searched for more knowledge
being smart didn't do much for you, or could even have you killed back in those days, if not royalty.
retarded or not royalty had all chances to reproduce.
people died way younger back then, so brain had to be good for 30-40 years. plus knowledge was seen as magic in many places, plenty burned for being smart or asking questions.
Anonymous at Tue, 19 Mar 2024 09:55:00 UTC No. 16086242
>>16086229
no not really
>being smart didn't do much for you, or could even have you killed back in those days
like this is true but
people easily lived up to 50
you just needed to survive childhood diseases although yeah bacterial infections were much more common because they didn't know shit about hygiene and sewage treatment
>knowledge was seen as magic in many places, plenty burned for being smart or asking questions.
and this generally wasn't true
like even the old testament distinguishes wisdom from knowledge
wisdom is more God-given but knowledge is certainly obtainable by humans by thinking
I guess you make fair point
in general even among upper classes there's just no evolutionary demand of becoming even smarter
Anonymous at Tue, 19 Mar 2024 10:00:36 UTC No. 16086252
>>16086242
yeah but difference between wisdom and knowledge is if you were serving the right people, basically. I mean in practice. but I haven't lived in those times so yeah, we can only believe what history left for us (many times curated by the very ones making that distinction).
Anonymous at Tue, 19 Mar 2024 10:13:43 UTC No. 16086271
where did the neurogenesis thing come from with Lion's Mane? was there any study on it?
Anonymous at Tue, 19 Mar 2024 10:21:15 UTC No. 16086288
>>16086252
>many times curated by the very ones making that distinction
I don't entirely agree with you, but you're right about this
Lots of wisdom statements are detrimental to the elite class so it's not as simple as
>say good thing about elite = wise
bodhi at Tue, 19 Mar 2024 11:46:44 UTC No. 16086365
>Activities linked to IQ increase
Doing difficult math and logic problems (e.g. Springer Graduate Texts)
Orbitofrontal D1-D2 stimulation (apparently very potent)
Learning a new language (the more it differs from your mother tongue, the better)
Nucleus Basalis stimulation
Learn to play an instrument
Some (!) meditation techniques
Neurofeedback training (specifically Dual-N-Back)
Intermittent fasting
transcranial direct current stimulation (tDCS)
some memory activities/games
Continued education
lucid dreaming
some binaural beats
Anonymous at Tue, 19 Mar 2024 14:28:39 UTC No. 16086548
>>16086200
>why would adult neurogenesis go extinct
i'm just guessing but maybe it has to do with brain size, i imagine the overall size is limiting neuronal density at some point. "Homo's" head size isn't really much different for a long time now. Neanderthals actually had slightly bigger brains than homo sapiens in some cases. Head size is also related to the size of women's vaginas too, a head being too big might end up killing the parent or the child. So maybe to get bigger brains we need to make women's pussies heaps huge
Anonymous at Tue, 19 Mar 2024 14:41:39 UTC No. 16086575
>>16086548
>Head size is also related to the size of women's vaginas too, a head being too big might end up killing the parent or the child. So maybe to get bigger brains we need to make women's pussies heaps huge
lmao women limiting men's intelligence with their pussies once again. It's evolutionary over.
Anonymous at Tue, 19 Mar 2024 14:56:32 UTC No. 16086587
>>16086069
Number of neurons doesn't have to grow, but neurons can still. To replace old damaged cells. Literally if braincell have damaged mitochondria and you have enough of growth factor, soma gets replaced but axons set still when they are. It's known for decades now.
You trust in psychiatri is flawed thing, it's pseudoscience.