All right. Let's take a look together. The article is about a discovery - the neurons in hippocampus are found to have the capability of regeneration. The fact that neuron regeneration is happening everyday inside human brain, doesn't necessarily mean that the overall neuron count increases everyday. The neuron loss comes into play as well. It's a dynamic equilibrium, or you will see ever-growing olfactory bulb or hippocampus. Besides, hippocampus is a small part of the overall brain. Even if it does grow slightly over time, the impact to the overall neuron count in brain would still be minimal. This leads to the point that the amount of neurons most likely stay about the same level from a very young age, despite the constant neuron regeneration and neuron loss in certain areas of the brain. By the way, on what basis do you think that the utilization of our brain capacity is close to being maximized?
【在 L********r 的大作中提到】 : Probably you misunderstood the article. It's a discovery not an invention. : The neuron regeneration is happening everyday inside human brain.
L*r
60 楼
So I guess you got the point, some brain cells regenerate. Then that's it, the argument brain cells do not regenerate is false. For areas other than hippocampus, we currently don't know yet. There is no need to waste time to extrapolate as I don't work in that area. Regarding the myth of 10-20% brain usage, it's been refuted repeatedly in the scientific field. But I guess the ignorance is just like a worm that never dies. http://en.wikipedia.org/wiki/List_of_common_misconceptions http://www.csicop.org/si/show/the_ten-percent_myth/
as that
【在 s*****r 的大作中提到】 : All right. Let's take a look together. : The article is about a discovery - the neurons in hippocampus are found to have the capability of regeneration. The fact that neuron regeneration is happening everyday inside human brain, doesn't necessarily mean that the overall neuron count increases everyday. The neuron loss comes into play as well. It's a dynamic equilibrium, or you will see ever-growing olfactory bulb or hippocampus. Besides, hippocampus is a small part of the overall brain. Even if it does grow slightly over time, the impact to the overall neuron count in brain would still be minimal. This leads to the point that the amount of neurons most likely stay about the same level from a very young age, despite the constant neuron regeneration and neuron loss in certain areas of the brain. : By the way, on what basis do you think that the utilization of our brain : capacity is close to being maximized?
s*r
61 楼
Well, the 10-20% brain usage is a myth to me too. My problem is that I can' t seem to find a good way to quantify the brain usage. The brain works in network, so it's the number of connections not the number of neurons that represents better in terms of brain usage. But even if we know how many connections a human brain has, it is still hard to figure out that when the maximal brain usage is achieved, how many connections there are. It certainly is not a fully connected neuron network. And for the record, in terms of (regeneration) areas other than hippocampus, we do know one area, olfactory system. Sorry, I am beating this topic to death:)
to
【在 L********r 的大作中提到】 : So I guess you got the point, some brain cells regenerate. Then that's it, : the argument brain cells do not regenerate is false. For areas other than : hippocampus, we currently don't know yet. There is no need to waste time to : extrapolate as I don't work in that area. : Regarding the myth of 10-20% brain usage, it's been refuted repeatedly in : the scientific field. But I guess the ignorance is just like a worm that : never dies. : http://en.wikipedia.org/wiki/List_of_common_misconceptions : http://www.csicop.org/si/show/the_ten-percent_myth/ :
L*r
62 楼
What I can find in the link is that PET or fMRI shows activity in most parts of the brain, although those activities from different parts are not occuring simultaneously. It implies most parts of brain have its purpose, not just standing by. All in all, I guess the brain just like our muscle follows the same rules of "use it or lose it" and "no pain no gain", starting from infant till our death. The first 3,5 years are important, but the continuous stimulus and challenge of 80+ years definitely worth a lot more.
can' the hippocampus,
【在 s*****r 的大作中提到】 : Well, the 10-20% brain usage is a myth to me too. My problem is that I can' : t seem to find a good way to quantify the brain usage. The brain works in : network, so it's the number of connections not the number of neurons that : represents better in terms of brain usage. But even if we know how many : connections a human brain has, it is still hard to figure out that when the : maximal brain usage is achieved, how many connections there are. It : certainly is not a fully connected neuron network. : And for the record, in terms of (regeneration) areas other than hippocampus, : we do know one area, olfactory system. : Sorry, I am beating this topic to death:)
【在 s*****r 的大作中提到】 : Well, the 10-20% brain usage is a myth to me too. My problem is that I can' : t seem to find a good way to quantify the brain usage. The brain works in : network, so it's the number of connections not the number of neurons that : represents better in terms of brain usage. But even if we know how many : connections a human brain has, it is still hard to figure out that when the : maximal brain usage is achieved, how many connections there are. It : certainly is not a fully connected neuron network. : And for the record, in terms of (regeneration) areas other than hippocampus, : we do know one area, olfactory system. : Sorry, I am beating this topic to death:)