pitubo wrote:entheogenic-gnosis wrote:pitubo wrote:entheogenic-gnosis wrote:The "big bang of the brain" is almost certainly has some relation to diet and chemicals located in plants, though most would not accept this notion...
And it's not just the notion, it's the reasoning to start. By the logic of this argument, every species that eats certain plants and/or chemicals will have a "brain explosion"? What about dolphins?
entheogenic-gnosis wrote:Ok, I'm going into "speculation mode" so I will stop here...
Thank you. Lets not have
this all over again.
How is the "reasoning" in question?
Firstly, I want to thank you for your pointed and complete reply. It is very rewarding to see you understanding my challenges to your arguments and reasoning. I am so humbly grateful that you fully addressed all of my questions.
entheogenic-gnosis wrote:The "big bang of the brain" did happened, explaining "why" has been the task at hand.
Diet and evolution are obviously linked.
What a brilliant argument! How could I have not considered in the first place that the causal relation is "obvious".
Okay, let's be serious now:
entheogenic-gnosis wrote:With out tryptophan we have no higher tryptamine neurotransmitters such as serotonin or meletonin, with out Phenylalanine and/or tyrosine we could not produce phenethylamine neurotransmitters such as dopamine and epinephrine. without these compounds, which we must obtain through diet, we could not have higher brain function...our brains would not function without these tryptamine neurotransmitters. Tryptophan must be obtained in our diet, this is what makes it an "essential" amino acid. So since plant amino acids give us the means to produce higher neurotransmitters, and that some of these amino.acids are "essential" shows me that the connection between compounds derived through diet and our brain's evolution is really not up for debate.
But it
is up for debate. These amino acids were likely already essential well before the human brain's evolution. Considering that, from where are you then conjuring up the relation with the brain's evolution?
I also repeat the (unanswered) question about all the other animals that eat plants containing Trp, Phe and Tyr? Why has their brain not exploded?
entheogenic-gnosis wrote:Quote:For the first two thirds of our history, the size of our ancestors' brains was within the range of those of other apes living today. The species of the famous Lucy fossil, Australopithecus afarensis, had skulls with internal volumes of between 400 and 550 milliliters, whereas chimpanzee skulls hold around 400 ml and gorillas between 500 and 700 ml. During this time, Australopithecine brains started to show subtle changes in structure and shape as compared with apes. For instance, the neocortex had begun to expand, reorganizing its functions away from visual processing toward other regions of the brain.
The final third of our evolution saw nearly all the action in brain size. Homo habilis, the first of our genus Homo who appeared 1.9 million years ago, saw a modest hop in brain size, including an expansion of a language-connected part of the frontal lobe called Broca's area. The first fossil skulls of Homo erectus, 1.8 million years ago, had brains averaging a bit larger than 600 ml.
From here the species embarked on a slow upward march, reaching more than 1,000 ml by 500,000 years ago. Early Homo sapiens had brains within the range of people today, averaging 1,200 ml or more.
As our cultural and linguistic complexity, dietary needs and technological prowess took a significant leap forward at this stage, our brains grew to accommodate the changes. The shape changes we see accentuate the regions related to depth of planning, communication, problem solving and other more advanced cognitive functions https://www.scientificam...has-human-brain-evolved/ There we go again, just like in the other thread. You quote pieces of popular science articles with a superficial veneer of authority that nevertheless have questionable or absent relevance to your case. In the other thread, careful review proved that some of the people who you quoted as if they proved your argument, actually disagree strongly with your viewpoints.
entheogenic-gnosis wrote:As for the "dolphins" thing, 50 million years ago dolphins were four legged land animals, think about the transformation in brain structure which must have occured to facilitate this evolutionary transformation in the dolphin.
The point I made with the dolphins was that plants are not a part of their diet. So where is the role of plant chemicals in their brain evolution? I put this forward because it pointedly challenges your "reasoning" with a simple example. Obviously, you completely ignore that part.
entheogenic-gnosis wrote:As for saying "we don't want this to happen" and posting an older thread, everything I said in those threads was also in this thread, my argument and presentation of evidence has changed very little, it was how others reacted to it Which makes the difference.
Not everything in that thread is in this (yet) and your "evidence" in the other thread was completely deconstructed there already. Perhaps you should actually re-read that thread? Or will this be another example of not responding to any direct questioning and instead persisting in your own viewpoints and baseless claims of proof?
entheogenic-gnosis wrote:All my statements come complete with empirical evidence and references.
entheogenic-gnosis wrote:Though if there's anything in there which you have questions about, I would gladly go into great detail.
I already pointed out some questions, which you mostly ignored and took as an occasion to gladly go into great detail about your own viewpoints.
How about actually considering the questions already put forward before actually addressing them?
How about you telling me what the slugs, who were eating my psilocybe cyanensis patch a few weeks ago, are up to? Should I expect a "slug brain explosion" any time soon (in evolutionary terms)?
Quote:What a brilliant argument! How could I have not considered in the first place that the causal relation is "obvious".
Re-read what I wrote, along with many other factors, diet is obviously a key piece of evolution.
Again, the fact that there was a drastic change in brain size of early humans is documented:
So, what are the potential causes?
Let's look at natural selection and genetics:
Quote:The accelerated evolution of these genes in the human lineage was apparently driven by strong selection. In the ancestors of humans, having bigger and more complex brains appears to have carried a particularly large advantage, much more so than for other mammals. These traits allowed individuals with "better brains" to leave behind more descendants. As a result, genetic mutations that produced bigger and more complex brains spread in the population very quickly. This led ultimately to a dramatic "speeding up" of evolution in genes controlling brain size and complexity.
This argument claims that natural selection caused genetic mutation, though I have difficulty believing that natural selection alone could be responsible, as the complexity of the mutations was vast:
Quote:One of the study's major surprises is the relatively large number of genes that have contributed to human brain evolution. "For a long time, people have debated about the genetic underpinning of human brain evolution," said Lahn. "Is it a few mutations in a few genes, a lot of mutations in a few genes, or a lot of mutations in a lot of genes? The answer appears to be a lot of mutations in a lot of genes.
We've done a rough calculation that the evolution of the human brain probably involves hundreds if not thousands of mutations in perhaps hundreds or thousands of genes -- and even that is a conservative estimate https://www.sciencedaily...2005/01/050111165229.htm Natural selection alone does not seem sufficient in my mind...
So what caused these genetic mutations?
While Mutagenesis can occur spontaneously, generally exposure to mutagens is needed.
Where would these mutagens come from?
Diet and environment.
As to amino acids being essential* prior to evolution of modern humans, I feel these compounds must have become essential during our evolution.
The whole amino acid argument was to show that plants produce our currant neurochemistry, and that with out these essential precursors derived through diet that our evolution into our currant stare would not have been possible.
When it came to the dolphin example, diet was not mentioned, you stated "if humans brains had a big-bang than why didn't dolphins?" And I responded "million years ago dolphins were four legged land animals" pointing out that this species did in fact have its own period of radical evolutionary change.
Quote:Archaeologists tell us that around 40,000 years ago humankind made a sudden and dramatic evolutionary leap. From seemingly nowhere our Homo sapiens ancestors developed a sophisticated tool technology alongside a fulsome culture of symbolic art. It is an event known by some archaeologists as “the brain’s big bang” – an evolutionary turning point marked by a sudden ability in humans to daydream and think conceptually.
In Godhead: The Brain’s Big Bang, psychologists Joe Griffin and Ivan Tyrrell take this watershed moment in the great narrative of human history and make it the starting point for a tantalizing and powerful investigation into the mystery of human consciousness and the question: why do we exist? In doing so they may have solved the three fundamental questions mentioned above – without spending billions.
The authors argue that the brain’s big bang introduced creativity, mysticism and mental illness, all at once, into the human race. Those developments, they suggest, are the bi-products of evolved consciousness – a parallel track of imagination and reason – which, when employed harmoniously under certain conditions, allow humans to perceive, and merge with, the meaning of life and the universe. There is a subtle and hidden reality permeating all life, they say, implied in wisdom traditions and by quantum physics, that our biology normally prevents us from seeing.
Quote:
I also repeat the (unanswered) question about all the other animals that eat plants containing Trp, Phe and Tyr? Why has their brain not exploded?
This is explained above, tryptophan was not the issue, compounds in food driving evolution was, the tryptophan was in direct relation to serotonin production, I was making the point that we depend on plants to produce our higher neurotransmitters, so why not assume that the evolution of our neurotransmitters is connected to the plants needed to be consumed to produce them?
Quote:You quote pieces of popular science articles with a superficial veneer of authority that nevertheless have questionable or absent relevance to your case. In the other thread, careful review proved that some of the people who you quoted as if they proved your argument, actually disagree strongly with your viewpoints.
You called into question the "reasoning" that a big bang of the brain occured, this was my reference showing that scientifically it's an accepted notion.
I would be happy to respond to any direct questions, it helps if the are direct, and to the point. It also helps when you use my words rather than your assumptions regarding my words when asking these questions, rather than saying "you say this or that" post what I said in quotations, then outline what you think it means.
I can't recall any of my direct questions ever being answered...even in this thread. For example, some said "don't you think a brain and nervous system are needed for consciousness?" Or something to that effect, and I said "what about jellyfish?".....*crickets chirping*
Sometimes, if it appears that there's no way to get through to a person, or if I feel a person is looking for, or inventing flaws in my posts for the sake of ego or arguement, I will choose not to respond, it's a complete waste of time or energy.
If I'm making an actual error, by all means correct it, I have always responded politely to this type of correction, but if it's abmatter of opinion and no amount of words will change that, what's the point?
-eg