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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Supporting evidence to research paper

I am writing a research paper about the connection between age and active memory. I have been writing about the changes/development in grey and white matter, and in particular about synaptic pruning ...
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21 views

Quantum Brain Dynamics [closed]

To begin with am totally new to biology. I have no basic knowledge also But I have been studying about neurons recently and this thought struck me suddenly. I saw that neuron works based on electro ...
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43 views
+50

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 ...
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1answer
22 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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12 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 ...
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0answers
6 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 ...
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0answers
25 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 ...
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0answers
35 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 ...
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21 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 ...
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0answers
110 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 ...
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0answers
38 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 ...
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0answers
37 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 ...
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1answer
60 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?
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1answer
34 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 ...
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0answers
94 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 ...
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2answers
67 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 ...
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0answers
24 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 ...
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1answer
67 views

Can brain damage caused by physical injury affect the social behaviour of a person?

Can a physical injury to the brain, resulting from an accident, and not the result of a diagnosed mental illness, affect a person's social behavior?
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1answer
38 views

Why does our mouth “water”?

Whenever we see something delicious, rapid salivation starts in our mouth. Also, it doesn't happen for all other food, which we eat regularly. So, Is there any particular use of "rapid salivation"? ...
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1answer
42 views

Dreaming after passing out

I'll have few questions about passing out and dreaming. English is not my native language, and my biology knowledge is very limited. So bear with me. What exactly is blackout? (in a really simple ...
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1answer
139 views

How does the brain recall information?

In computers, finding a single word is realized through serial attempts across all available connections to find a specified target. How does the brain solve this? How does the whole process, from ...
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2answers
118 views

Is there a difference between visual sensation and imagination in the brain?

How substantial is the difference between the neural signal associated with seeing an image and the imagination of that image? Surely, it can not entirely copy the pathway from the sensory organs to ...
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0answers
8 views

Is there an evolutionary reason why so many white matter tracts decussate in the brainstem and spinal chord?

From a developmental perspective, I would tend to assume that it would be much simpler for the fibers descending from (for instance) the pyramidal tracts, superior cerebellar peduncles, or ascending ...
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0answers
16 views

Human Brain at any waking moment is doing approximately how much “calculations” the way we measure Supercomputer Computation Ability [closed]

We have computer processors keep improving leaps and bound every year. I want to know how many "calculationsc are typically simultaneously done by human brain at any normal waking moment. It should ...
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0answers
27 views

Is there any evidence to suggest that exercise reduces the side effects of caffeine?

I heard a friend say: I'm not drinking coffee this week. My body can only process the caffeine if I run at least 15km a week. I found this claim fascinating - that exercise temporarily ...
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0answers
27 views

What is meant by memory flushing? [closed]

Does this term mean movement of information from STM (short term memory) to LTM (long term memory), or this means removal of information?
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0answers
24 views

Acetylcholine and muscles- excitatory or inhibitory? (muscle atonia and myasthenia gravis)

I have heard that acetylcholine can be excitatory or inhibitory, but I am confused as to which it is when it comes to muscles. On the one hand, I believe that muscle atonia during REM sleep is ...
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55 views

“synapses grow closer together in order to decrease the distance”, is it true?

Is there a source? That synapses get physically get close as their interaction increases. I have also read that where neurons crosses each other they create new neuron, is that true?
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1answer
95 views

How does the brain manifest and realize the intention to resist sleep?

The question title says it all. What happens in my brain when I resist sleep? I would appreciate explanations on neurotransmitter changes, what areas of the brain activate to resist sleep, what can an ...
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1answer
49 views

Nernst equation?

I keep seeing the Nernst equation in two different forms, one using the natural log and the other using log base 10. Could someone explain why there are two different versions, and which should be ...
3
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1answer
74 views

Loss of appetite during fever

It is a well-known phenomenon that sickness like the common flu is often accompanied by reduced appetite. Why do sick people stop eating?
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21 views

Access and decay time of long-term memory

As for STM (short-term memory), access time is 70 ms and decay time is 200 ms. Is there any calculated time for LTM (long-term memory) also? And does LTM really decay with the passage of time?
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14 views

Limits of brain neuronal spatial mapping

It is being claimed that brain maps the world space in (roughly) 1-to-1 correspondance of a place to a neuron (link1, link2). My question is: as the mapping happens in 1-to-1 manner, then is it ...
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0answers
33 views

Distribution of synaptic connections

What is the roughly the distribution of the various synaptic connections in the brain. Consider the following types: axoaxonic synapse between the axon of one neuron and the axon of another ...
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1answer
43 views

How the brain is affected by Alzheimer's disease

What exactly happens to the neurones in the brain? why can't they be repaired/restored? Why is it that there are so called 'good days'? What happens to the brain on such days?
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1answer
69 views

What is the role of the tissue surrounding neurons in decision making and taking control of impulses?

How does the fatty tissue surrounding neurons supports and enhances the speed of electrical impulses? How does it stabilize connections that take control of impulses and decision-making? The cells ...
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3answers
112 views

Is NZT-48 real?

NZT is a fictional compound in a movie called limitless, basically it's a brain booster, it gives access to more simultaneous neuron activity. are there any real cognitive enhancers out there?
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1answer
21 views

Typical neuronal firing rates across the human cerebral cortex

I would like to find a scientific article (or articles), which would summarize typical neuronal firing rates in different parts of the human cerebral cortex. Any good references on this?
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23 views

Are there different types of communication and computation neurons?

I know from my basic education in neurology that the brain has various sorts of neurons. These are usually bunched into 3 different categories. I read in a recently published book including papers on ...
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0answers
19 views

3D model - ant brain - precision and laboratory

I have some question. Is today's modern laboratory can perform high-resolution 3D model of the ant brain? This model would consist of a layer (sections 2D), which are made with a scanning electron ...
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0answers
10 views

How long can the brain function after cutting blood circulation? [duplicate]

If I cut blood circulation from the brain, for how much long can the brain fuction and send commands to the body like the legs?
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2answers
1k views

Do we use 100% of our cerebral capacity?

I saw a movie yesterday called Lucy. In this movie, a girl called Lucy absorbs a large amount of CPH4, and her brain capacity slowly increases. So that brings me to my question which is : Do we ...
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0answers
16 views

What is the decision making process when a bird builds a nest?

I have been watching The Life of Birds and I am rather startled by the ingenuity some birds show in building their nests. For instance, one species built a dummy nest on top with a secret entrance ...
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2answers
159 views

What were the symptoms of Phineas Gage after suffering his brain injury?

Phineas Gage was a construction worker who suffered a head injury due to an explosion at a construction site. A metal rod was pushed up his cheek and through his head. I have heard he demonstrated ...
3
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2answers
347 views

Can dietary monosodium glutamate intake induce restlestness?

The question is all in the title. More context: I like phở soup. I have noticed that I get restless after eating the phở soup at some restaurants. The effects are similar to the ones resulting from ...
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0answers
43 views

How does the brain store information? [duplicate]

In all electronic devices with the possibility of saving there are tiny magnets that can store your data by the state they are in. In general, there has to be something changed to store information ...
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2answers
113 views

How do ascending neural pathways filter unimportant information?

In school they told us one of the functions of the ascending neural pathways is to filter unimportant information. But the neural signal I know, is only a chemical-electrical chain of neurons. Is this ...
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1answer
48 views

How does the brain regulate its temperature?

I recently ran into a bio-physical paradox while trying to solve an engineering problem, using nature's way as a guide; namely the brain. I'm working on designing a totally new system of liquid/gas ...
28
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1answer
4k views

Why is the brain white?

I have read many articles about how the brain is the most power-hungry organ in any living complex organism, requiring about 70% of it's oxygen supplies in the resting state. Since the usual medium ...
2
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0answers
38 views

Thinking quickly causes elevated mood

I read this article: http://www.sciencedaily.com/releases/2006/09/060926171045.htm It says, "When people are made to think quickly, they report feeling happier as a result. They also say they are ...