The primary component of the central nervous system, which, along with the spinal cord, controls the body of bilaterally symmetrical beings.

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14 views

Can human be emotionless?

Is it possible that a person can't produce, like, dopamine, serotonin, and other emotion hormones? Or, a part of the brain can't function to make one feel something?
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17 views

Is the human brain the muscle with the greatest leverage? Menu to brain [on hold]

1) The brain being our best lever, muscularly, shouldn't we treat it better? 2) Diet being our best conduit to good health in general, don't we need more competition in the food market, relative to ...
7
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2answers
76 views

How do neurons find each other?

Neurons form complicated networks in brains, but their connections can't be random (at least not entirely). Brains function similarly among all members of individual species, and that functionality is ...
1
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0answers
20 views

Does my brain have limited learning capacity or memory?

Lately in my free time I like to read books, articles etc etc.. What I have discovered, or maybe it is an illusion(lack of concentration or something), is that I usually forget most of the material ...
-1
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0answers
9 views

Are there programs (like computer programs) implemented in our brains, and if so, how?

You often hear that our brains are like computers (with hard discs, an operating system, etc.). But if so how are programs realised in our brains? For computers, it´s easy to show where they are ...
3
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0answers
34 views

Why does crippling pain exist? [closed]

Some kinds of trauma can cause pain so severe that it makes you unable to move or do anything at all. It may put you out of action and unable to help yourself because of how excruciating it is. ...
20
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1answer
285 views

What's the mechanism for being mentally tired?

I notice that after long tests, or long periods of critical thinking, my body and mind feel noticeably tired. Why does this happen? Are the neurons in my head not firing as quickly, or is there just a ...
7
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2answers
85 views

What really is color and how do we perceive it?

How do our brains actually transform the information that our cones receive into the different colors that we can see and imagine? Sorry if this question is low quality, I just couldn't find a good ...
1
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0answers
42 views

Is it comfirmed that Alzheimer's is a diabetes of the brain?

I read in this New Scientist report, that the mental decline during diabetes may be an early stage of Alzheimer's. The hypothesis was based on a study with 20 rats. Has there been any follow up ...
0
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1answer
5 views

Physical activity in fasted state: Glucose for brain vs muscles [closed]

Let's consider this scenario: You do sports in the morning in a fasted state (i.e. without consuming any calories after waking). Your brain of course needs glucose and your liver probably still has ...
2
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0answers
33 views

Can sleep be replaced by chemical supliments? [closed]

If adenosine makes a person sleepy to rebuild chemicals in the brain, than is it possible to inhibit adenosine and externally produce and inject the needed chemicals?
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0answers
48 views

What happens to the human brain when unconscious?

What part of the brain gets affected and does it harm the brain? Thank you I just needed some extra info for a video I'm making.
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0answers
43 views

What happens to the brain during sleep versus unconsciousness?

How does being unconsciousness differ from being asleep and whether it causes breaks in consciousness?
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1answer
73 views

Why doesn't the rest of the body have something like the “blood-brain” barrier to protect itself from pathogens?

According to Wikipedia: "The blood–brain barrier acts very effectively to protect the brain from most pathogens". This is because the pathogens cannot pass through the tight junctions of the ...
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0answers
10 views

Detecting brainwaves with no direct contact and no electrodes

Brainwaves are low frequency waves which is hard to detect and can be interfered with radio waves.i heard that it is possible to detect it with radio telescope and can be analysed with computers and ...
4
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1answer
59 views

How can neurons divide without centrioles?

I have read in my studies that neurons lack centrioles. If that is so, then how is it possible that new neurons are added to our brain? Does this have anything to do with memory loss?
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0answers
46 views

Brain capacity of Cro-magnon man vs Modern man

Cranial capacity of Cromagnon man was about 1650cc whereas average cranial capacity in modern human is 1450cc. My question is, why during the course of evolution, a reduction in cranial capacity is ...
4
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0answers
26 views

How were (many) dinosaurs' brains so small?

Brain size (or its proxy, encephalization quotient) usually varies allometrically with mass -- larger creatures need larger brains to control their larger bodies, apparently. Dinosaurs are popularly ...
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1answer
37 views

the evolution of the human brain size [closed]

I was thinking, as I know, sometimes the process of producing DNA did not work well(correct me if I'm wrong), so it gives us some changes in the object we gonna ...
4
votes
1answer
20 views

“Next generation” brain scanners, can they detect CTE?

I've just read the news that a "new generation" brain scanner is under development. I wonder whether they can detect chronic traumatic encephalopathy. I haven't been able to find the paper about these ...
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0answers
31 views

Is there an equivalent to a refresh rate for the brain and consciousness?

Computers have a clock rate that synchronizes their processors. In spite of tempting analogies, the brain is clearly not simply an organic computer. It is constantly changing, rewiring and pruning its ...
4
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2answers
151 views

Headshot = instant kill? [closed]

While whatching a film, I've been thinking about how does a headshot kill someone, and how long does it take? For example let's say you've beeing shot by a normal (police) handfired weapon - no ...
2
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0answers
34 views

Transcranial Magnetic Stimulation on science fair [closed]

My friends and I would love to make a TMS machine and apply it to make famous "god helmet". We know that magnetic stimulation may cause visions of angels, gods etc. My question is: what are the ...
4
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0answers
26 views

Does Alzheimer affect more than day-to-day memory?

I know that Alzheimer's damages a part of the brain called the hippocampus, which has a central role in day-to-day memory. But, could it affect also on things in other memory centers, things such as ...
4
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1answer
46 views

How long does a spiking signal last?

It is surprisingly hard to find information about the timing of neurons, in particular how long an action potential can contribute to the summation of a neuron. Is it on the order of milliseconds or ...
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0answers
55 views

How would a human brain change if it existed in isolation? [closed]

How would a human brain change if it didn't receive any signals for a longer period of time (e.g. 1 month)?
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0answers
107 views

What are the dangers related to keeping a human brain alive outside of a human body? [closed]

I am interested in learning about the feasibility of keeping a human brain alive outside of a human body. The question: What obstacles do we need to overcome to be able to keep a human brain alive ...
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1answer
75 views

What were the main discoveries in Biology? [closed]

What were the greatest achievements in Biology? Can you please provide a short list of discoveries that you would consider as being the most important discoveries of the history of Biology.
3
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0answers
27 views

How is the brain kickstarted during development [closed]

The brain is a complicated beast, that operates (generally) by electrical activity. During development, all cells originate from the a single "cell": the zygote. At some point during development, the ...
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0answers
34 views

How to use the 10-20 system of placement with 3 leads in EEG?

I am trying to get EEG signals using a homemade circuit. I have 2 active electrodes and a reference electrode. My question is, can I implement the 10-20 system of electrode placement by connecting the ...
1
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0answers
52 views

What is meningitis? [closed]

I know that meningitis is the inflammation of the meninges surrounding the brain and the spinal cord. But I still don't understand this definition. If you can broaden the definition, please do.
4
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2answers
165 views

Brain wave and motor movement correlation

I am trying to better understand which brain waves are generated when the motor system (arms, legs, muscles of any kind) are activated. According to Wikipedia, several types (Beta, Gamma, Mu) appear ...
1
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0answers
40 views

why does brain produces noise? [duplicate]

when i look at a white wall i see little colored dots moving in circles filling my whole visual view, just like the static on a tv but then in color. I thought everybody had this but recently i ...
5
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1answer
49 views

What physical or mental actions can be picked up by EEGs?

There certainly seem to be a lot of gadgets and gizmos leveraging EEG technologies to the control of devices. This makes me wonder: what intentions/thoughts can be captured by EEG technology, and ...
0
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0answers
11 views

how to see prefrontal cortex works normally by a test?

Is there a test to see if the Prefrontal cortex of someone works normally? especially a simple test like a questionnaire that you give the individuals to fill out and based on their answer you obtain ...
1
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1answer
108 views

Synaptic pruning and selective elimination during adolescence

How does Synaptic pruning occur during pre-adolescence, adolescence and post-adolescence, after there is blooming overproduction of synaptic connections until the years of late childhood, and how does ...
1
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1answer
46 views

Examples of seeking behavior by brainless animals

Are there any examples of brainless animals (e.g. jellyfish) exhibiting seeking behavior, such as following smell or light gradients towards food, or following hormones towards mates?
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0answers
32 views

Atlas from human brain structures to 3D coordinates?

I would like to visualize specific human brain structures in the three dimensional space and compute specific geometric properties of these brain structures (size, centroid, etc). Therefore, I am ...
0
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0answers
10 views

Is there a joint on a brain connecting both inner speech and outer speech sensation?

I'm interested of the neurophysiology of the inner speech/inner voice aka. auditory thinking. This question is similar to: What are the common neural circuitries between visual sensation and the ...
2
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0answers
48 views

How do Binaural Beats Work?

We have a project on different ways of relaxation. One way I found out was binaural beats. Could anyone please tell me how they work. You guys are masters when it comes to simplifying things! All I ...
1
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0answers
59 views

Why do we have two brain hemispheres? [closed]

Is there any explanation why we have two brain hemispheres? Is there any advantage of having two in contrast to having one (or three / four)? From what I've read so far (not too much; I'm not a ...
0
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1answer
52 views

How does the brain train its neural network?

One question that came up learning how artificial neural networks are working was how the brain can train its neural network? When we say we have an artificial neural network, the problem behind it ...
2
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0answers
112 views

How much should one smoke in order to prevent Parkinson's? [closed]

There are studies who claim that nicotine has a neuroprotective effect against Parkinson's(such as this: http://www.ncbi.nlm.nih.gov/pubmed/11772120) What would be the minimum amount of nicotine(...
1
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0answers
40 views

Of people who develop Alzheimer disease, are those people genetically predisposed to it?

I have read a lot lately about microbiological pathogens that are found in blood vessels in the brain of patient's with Alzheimer disease (positive association). So, I am confused whether there are ...
0
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0answers
65 views

Does recovery time after a concussion really prevent CTE in football players?

I just watched Concussion, which introduces the discovery of a brain disease called CTE due to head trauma, and in looking at the NFL's response to the issue of CTE, one of the primary solutions I saw ...
2
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1answer
124 views

How does waking up from an alarm clock work?

During sleep, one's brain is shut down. All it can do is to see some dreams from the semi-conscious mind. Then how does it hear when the alarm clock rings?
2
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1answer
42 views

Are all tastes just a combination of sour, sweet, bitter, etc.?

For example, can the taste of pineapple be isolated to just a certain amount of "salty-taste-triggering-molecules" and "sweet-taste-triggering-molecules" etc.? Can our current understanding of the ...
10
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2answers
188 views

Understanding the brain: how are neurotransmitters released in the brain?

I have a basic knowledge of how neural networks work. A potential difference is created that forces sodium, potassium, chloride, and calcium ions to flow which carries an electrical signal to the end ...
3
votes
2answers
88 views

How can neuronal signals faithfully be reproduced by scalp electrodes?

There is a skull barrier (and possibly other layers too) between the brain and the scalp. I have seen people trying to extract EEG signals from the scalp by connecting electrodes and interface it to ...
2
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0answers
27 views

Synapse formation [closed]

I am trying to learn about neuronal synapse formation, but the literature is intimidating to someone with little background knowledge. I am interested in synapse formation in both human adults as ...