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Myths about the brain

nautil.us

51–60 of 80 posts

Re: Myths about the brain

#51

Earlier quoted context omitted.

Suffered some minor strokes. Right left brain stuff was interesting. Lost ability to hand write. But could draw fine. Right side of body became very weak and numb. Some mental stuff was fine. Others were not. Last I looked up it seemed to match left and right brain theory. Creative vs math side, etc.

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Wow, this is appalling medical advice.

Perhaps diet, exercise, and evidenced based treatments would be a good place to start.

Re: Myths about the brain

#52

I'm no expert, but this article seems misleading in several ways. >Myth number one is that specific parts of the human brain have specific psychological jobs. Your brain is both very compartmentalized and generalized. The neocortex contains many discrete regions with very specialized neural architectures for specific tasks. The visual cortex and Broca's Area have specific and very different psychological jobs. No one…

Of course the brain responds to stimuli. I really don't know what the author is talking about. Neurons work on a rate code, and so of course they are firing all the time--at a baseline rate.

Re: Myths about the brain

#53
The product manager in me squealed at this part:

"Predicting and correcting is a more efficient way to run a system than constantly reacting in an uncertain world."

Re: Myths about the brain

#54

"Today, we know the brain isn’t divided into puzzle pieces with dedicated psychological functions. Instead, the human brain is a massive network of neurons." Wow. Speechless. Maybe it's Broca's aphasia? It's a sad day when nautil.us is publishing stuff like this. Sigh.

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Re: Myths about the brain

#55

Earlier quoted context omitted.

That's a good question, I'd need to ask a neurologist friend of mine. IIRC there are some areas that are localized almost in the sense of a circuit. Hearing is an example, which needs to process sensory information much faster (and more direct) than ordinary pathways would, in order to be able to construct spatial representation from latency differences.

I suppose "more direct" can be interpreted differently, but to the best of my knowledge the signal from your cochlea takes more axonal jumps[0] than e.g. visual, which jumps "only" through LGM[1]. Even more direct is the olfactory pathway which skips the thalamus altogether[2]. However, in the context of the article you might be referring only to intertelencephalic processing, in which case I'd love to read a paper w…

Hi @porkbrain, it's going to take a few days but I'll ask and come back with such an article if my friend (whose specialty is auditory processing and sensor fusion) can recommend one.

Re: Myths about the brain

#56
post #4

This article bothers me a little bit. It makes it sound like the brain is completely structureless, and that the division of brain into "parts" is a myth. I'm not a neurologist but this seems a disingenuous. Surely we know that the limbic system serves a major role in emotions. We know that the hippocampus serves a major role in long term memory formation. The amygdala controls the fear response. Plenty of other exam…

https://en.wikipedia.org/wiki/Brodmann_area

Re: Myths about the brain

#57
post #3

> [Myth 1] specific parts of the human brain have specific psychological jobs ... [Rebuttal] Neurons in a brain region called the anterior cingulate cortex are regularly involved in memory, emotion, decision-making, pain, moral judgments, imagination, attention, and empathy. This is not a rebuttal to the myth. Imagine I'm talking about a car, and I say: It's a myth that specific parts of the car have specific functio…

What do you think of the part where they say that when you measure whole brain activity you'll see that most tasks actually involve all of the brain? That's not really how q car works at all, some parts can have a primary and alternate effects, but not everything in the car will always be part of each process.

Also, I might misread, but it seems to see neurons are not different in different parts, so it seems that you could interchange the functionality and the pathways might not be due to specialization, but more to topology and arrangement of interconnections and proximity to things.

Re: Myths about the brain

#58
Fieldman Barrett's book, "How Emotions are Made" is really, really interesting and goes into way more detail about the subjects she mentions here and others.

She backs up all of what she writes, as well: a good 20% of the book is simply footnotes.

Re: Myths about the brain

#59
post #3

> [Myth 1] specific parts of the human brain have specific psychological jobs ... [Rebuttal] Neurons in a brain region called the anterior cingulate cortex are regularly involved in memory, emotion, decision-making, pain, moral judgments, imagination, attention, and empathy. This is not a rebuttal to the myth. Imagine I'm talking about a car, and I say: It's a myth that specific parts of the car have specific functio…

> But we have a huge body of evidence showing that there is a big difference in how the left vs. right brain processes information

I don't think we actually do have this evidence. In fact, I think there's been specific research that has debunked that idea.

Re: Myths about the brain

#60
post #3

> [Myth 1] specific parts of the human brain have specific psychological jobs ... [Rebuttal] Neurons in a brain region called the anterior cingulate cortex are regularly involved in memory, emotion, decision-making, pain, moral judgments, imagination, attention, and empathy. This is not a rebuttal to the myth. Imagine I'm talking about a car, and I say: It's a myth that specific parts of the car have specific functio…

Could it be that there is almost no distinction between brain parts but that the way a fetus grows 'specializes' certain parts?
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