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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2
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1answer
47 views

Why do the neuron pathways decussate?

I learn about the brain right now, and there are crossing of neuron pathways everywhere; in the thalamus, the medulla oblongata, the pyramidal tract... And I don't understand why? What is the reason ...
1
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0answers
23 views

Triune brain model

I have heard about the triune brain model in biology class, but my teacher does not know much about it. What I'm curious about, is this model accepted by most of the neuroscientists, or is it just a ...
6
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1answer
115 views

What is meant by “neurotransmitters flooding the brain”?

I frequently hear expressions like "Dopamine flooding the brain" or "X neurotransmitter flooding the brain" used to communicate with general audiences. For example: "Following [orgasm]? oxytocin ...
6
votes
1answer
268 views

Influence of alcohol on brain cells

As I am not related to biology, I would appreciate if you can keep your answers as simple as possible. My question is about the influence of alcohol on the brain. As far as I know, drinking alcohol ...
1
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0answers
21 views

Do we really dream multiple time a night? [closed]

So Ive heard that when we sleep for a good 8 hours we dream quite a few times? But we only remember very little of them if any, is this true? How is it known that multiple dreams occur if most of them ...
3
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1answer
44 views

Do people who have been blind all their lives dream?

Do the people who have been blind all their lives dream and do they experience or report "imagery" in the dreams?
2
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2answers
260 views

Do brain cells shrink during REM sleep or a lucid dream?

In this BBC news article a study shows that during sleep brain cells shrink to open up the gaps between neurons and allow fluid to wash the brain clean. But do the cells shrink and undergo the whole ...
2
votes
1answer
61 views

What is the creature with the lowest neuron count that demonstrates cognition beyond reflexes?

I'm under the impression that nematode worms just perform the same scripted actions over and over again in response to specific stimuli. They have 302 neurons. Chimpanzees display problem solving ...
1
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1answer
44 views

Is there a scientific name for the field of study focusing on the hemispheres of the brain and their control of opposite sides of the body?

I'm assuming this field of study would focus on motor controls, movement, and exercise, but it could also focus on activities which strengthen the corpus callosum or stimulate a specific half of the ...
2
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3answers
167 views

Why do we dream?

Is there any specific reason behind why we dream. Why sometimes we are getting wierd and unusual dreams. Sometimes we cant even recall what we dreamt off. Why this happens?
0
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1answer
63 views

Will we ever be able to read the thoughts from brain activity? [closed]

Is it theoretically possible to "read" a human's thought from brain activity? As far as I know we can already detect in what kind of mood a person is. Personally, I don't think "reading" word by word ...
4
votes
1answer
108 views

Does playing music during sleep actually suppress rather than rouse the brain?

I've long been interested in the effect of music/sound on dreaming, and even built 2 apps that play music during REM period. Now I'm looking at this article about FMRI studies of a sleeping brain, and ...
0
votes
1answer
57 views

How does a smoker's pleasure work?

I smoke. For some reason, I've always had this idea that the pleasure of smoking works more or less like this: from the lungs, the nicotine reaches the blood, with which it travels to the brain, and ...
3
votes
0answers
58 views

How do duplicate brain regions (ex: left/right amygdaloid body) operate together?

I frequently hear talk about parts of the brain like "Amygdala" or "Hypothalamus", so I looked them up in an app called "essential anatomy". What I see is that there's mirror symmetry, and most of ...
-1
votes
1answer
64 views

Can pheromones in perfume be formulated to cause agitation? [closed]

I generally don't care for female perfume. I have very sensitive olfactory receptors and in general, I just find perfume overwhelming. A couple weeks ago, my wife of almost 14 years and I were ...
2
votes
1answer
57 views

How good is information transfer between the hemispheres of the brain?

I sometimes listen to lectures on my phone using ear buds, but occasionally with only one ear bud in. Is the other half of my brain losing out on any aspect of the lecture? Just how good is the corpus ...
0
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0answers
37 views

What percentage of possible proteins has been tested by human brain evolution?

When the human human brain is discussed, I frequently hear an argument that goes like this "If there was a simple chemical solution for people to be smarter, nature would've already found it". I'm ...
2
votes
1answer
57 views

Can cerebrospinal fluid deliver nutrients/drugs to neurons during sleep?

I'm looking at this article on the possible mechanism of detoxifying brain during sleep using cerebrospinal fluid. It states that at night, the space between neurons may allow better (up to 20x) ...
1
vote
0answers
25 views

Systematic anticoagulant injection after a CVA

Since most of the cerebrovascular accident are ischemic ones, would it be usefull to have anticoagulant everywhere (we already have AEDs everywhere) so that everytime someone would have symptoms of a ...
0
votes
1answer
43 views

How to monitor the use of Nootropics?

How do you monitor the use of nootropics? What is a good process to measure both: side-effects and any improvements. Where can I find resources with scientific and tested data of short and long term ...
0
votes
1answer
225 views

Why temporal lobe is called temporal?

http://en.wikipedia.org/wiki/Temporal_lobe Does this have something to do with tempo (time?) Temporal lobe is behind (posterior) to frontal lobe, inferior to parietal lobe and is in front of ...
1
vote
3answers
166 views

What does orbital mean in orbital frontal cortex?

Orbital frontal cortex is where decisions are made. What does the word orbital there mean? I looked around in wikipedia and never find it.
2
votes
0answers
45 views

How well do we notice asynchronicity?

I'm stopped at a stoplight and, with nothing to do, my thoughts wander to the timed don't-walk sign that governs any pedestrians who might wish to cross the street I'm driving along. I can see two ...
0
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0answers
51 views

Left brain vs right brain

I wanted to know the basic differences between left brain and right brain. Does our left brain switches off during sleep? Is right brain larger in size than left one
3
votes
1answer
183 views

Are there any types of cancer that cause neurons to divide?

After birth neurons generally do not divide. But is there any specific type of rare cancer or tumour where neurons divide? And if there is such a cancer, then how is it possible for a neuron to regain ...
1
vote
3answers
1k views

Does Darwin's Theory of Evolution refute Terence McKenna theory “Stoned Ape” theory of human evolution?

I haven't read it but I'm asking for a quick answer. As far as I know, Terence McKenna's theory of evolution in humans main concept is that a hominid has tried in their diet psilocybin mushrooms, and ...
0
votes
2answers
588 views

Why have humans evolved conciousness?

Why did humans/animals evolve to become self-aware of their own thoughts. That is, why don't humans act and compute like a machine, or walking zombie. In my mind, such creatures would still be as ...
4
votes
0answers
71 views

Does Lucid Dreaming decrease the regenerative effect of sleep?

After watching this SciShow video on sleep, I wonder about lucid dreaming. Specifically: Does lucid dreaming and associated directed agency within Lucid Dreaming decrease the regenerative effect of ...
3
votes
0answers
58 views

The Operation of tuning in the S1 layer of ventral model

According to my previous question in ventral Stream pathway and architecture, I want now to get a brief example about how the S1 layer is constructed. In other words, how all the simple units are ...
0
votes
0answers
44 views

Is there a limit to how much concise information a human can learn adequately? [duplicate]

Like, I am trying to learn more chemistry, but also computer programming from the higher-level programming methodologies, frameworks, languages, APIs, XML, web development, and I'm also hoping to ...
1
vote
1answer
60 views

Radial Basis Function Network (RBF Network)

In the Wikipedia article on radial basis function network, I didn't understand what was meant by "center vector for neuron i", in other words "center of the RBF units called also prototype".
3
votes
1answer
173 views

Ventral stream pathway and architecture proposed by Poggio's group

Please can you give me a very brief explanation about all functions in the ventral stream architecture summarized in this figure: This figure is from Serre et al.'s A quantitative theory of ...
4
votes
1answer
145 views

Why does strenous exercise cause vision of “lights”?

I had a hard climb a week ago. I got so tired then any time I closed my eyes I saw these lights inside my head. I see these lights almost every time that I run fast or some thing like that. What are ...
8
votes
1answer
138 views

Is it a limitation of the eyes, or the brain, that we can't see a moving bullet?

Are the photoreceptors in our eyes not fast enough to register the fast moving bullet, or is the brain not powerful enough to make sense of something happening that fast?
3
votes
0answers
51 views

Deducing synaptic strength from electron micrographs?

There are several promising techniques for connectomics based on iterative sectioning and imaging of tissue with scanning electron microscopes (e.g. FIB-SEM and ATUM) By looking at such micrographs, ...
3
votes
1answer
549 views

Why Do Nerve Signals Get Crossed?

First off, I don't know if this is a normal healthy thing to occur. There have been many times where I have an itch on say my arm and I scratch it, only to feel the scratching elsewhere on my body. I ...
4
votes
2answers
89 views

Which part of the brain needs to be shut down to lose conciousness?

Whether it is mechanical (trauma), chemical (anaesthesia) or electrical - which part of the brain is shut down to cause loss of consciousness?
1
vote
1answer
159 views

L1 - L5 layers of the brain

I have read in some papers about the layers L1-L5 of the brain (e.g. in this paper). I could not find a definition of these layers. I have found information about the layers V1-V5 in the visual ...
1
vote
1answer
35 views

Human defenses to toxoplasmosis

Toxoplasmosis modifies the rat's brain to make them love (and be eaten by) cats. It also infects ~30% of humans, and modifies traits in several bad ways (i.e. schizophrenia and increased reaction ...
-1
votes
2answers
209 views

What would happen if you slowly crushed a live brain?

In a hypothetical scenario, if you cut open a person's skull to show the live brain, and then you slowly start to crush it.. At what point would the person loose consciousness? What would the ...
1
vote
1answer
115 views

Is eating salt dangerous for the brain?

I read somewhere that eating a lot of salt will raise blood pressure, which will in turn damage brain tissue. This is because water molecules gather around salt ions, thus making it harder for the ...
1
vote
1answer
26 views

Confusion regarding the ventricle system in the brain

I have a hard time finding out a small detail about the ventricle system. As the CSF flows into the 4th ventricle, there's a small foramen in the lateral aspect, as well as an open space bounded by ...
-1
votes
3answers
439 views

How come that we “feel” it when someone's watching us [closed]

The question is relatively easy (the answer however..). We all know this feeling "being watched" and more often than not this is a real thing. If someone is staring at us from the side or from the ...
1
vote
1answer
102 views

Molecules and human memory

Has it been demonstrated that the memory of human brain is just connections between neurons, not "long" molecules such as RNA or proteins?
3
votes
1answer
74 views

How do we memorize something?

When we see something, how and where in the brain do we remember it and are able to recognize it later? What happens in the brain that makes this possible?
1
vote
1answer
76 views

Eye Brain Mapping

If our eyes are separated by some kind of full proof barrier/isolation, is it possible that our brain can picture/visualize two different pictures at a time? How the brain will function in this ...
-1
votes
3answers
68 views

Are there “multi-frequency” signals within a human brain?

I know that neurons can exhibit tonic and phasic firing, and also that a neuron is sometimes called an integrator. This makes me interested to know if there are activities in the brain that depend on ...
3
votes
0answers
56 views

Iron metabolism in the brain

I did an expression profiling from publicly available RNAseq data for mouse tissues. While for liver and testes I am getting expected proteins in the top highly expressed mRNAs, for brain I am getting ...
2
votes
2answers
83 views

What causes autism?

What causes autism? By this I don't mean what is to blame i.e. Vaccines, Gluten or Pharmaceuticals etc.. I mean what exactly is happening in the brain to cause the autistic behaviors such as little ...
0
votes
1answer
292 views

How different is an introverts brain different from an extroverts?

How is an introverts brain wired differently than an extroverts? Just to give you an example. On an average, the processing that goes on in an introverts brain is greater than in an extroverts ...