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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9
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2answers
91 views

Is mammalian vision processed as a sequence of frames?

I often read that people believe that human vision has an inherent frames-per-second rate (FPS) that causes stroboscopic effects - such as seeing the spokes of a rotating wheel apparently rotating at ...
3
votes
2answers
137 views

What are the factors that control the speed of propagation of neuronal signals?

If we consider an analogy between a wire and a neuron there may be some resemblance between the factors controlling the data flow rate. For example the increased width of wire leads to decreased ...
6
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2answers
54 views

Neuronal Architecture of the Brain

To what extent do brains (e.g. of humans) contain recurrent connections? I am studying artificial neuronal networks and frequently encountered the statement, that recurrent neural networks are ...
2
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1answer
43 views

Is severe but short-term pain worse than moderate but prolonged pain for the body?

I'm wondering about the effects of different durations and intensities of pain on the body. So the two can be compared, let's say that the cause of pain is the same in both cases, but in one the ...
18
votes
5answers
5k views

Why do the two hemispheres of the brain control the opposite sides of the body?

Why does the left hemisphere control the right and the right hemisphere control the left? I googled it but didn't find a good answer regarding this. Could someone explain? Does this adaptation help ...
0
votes
1answer
82 views

Would it be possible to force the pineal gland to release dimethyltryptamine on command?

To my knowledge, the pineal gland is responsible for the release of dimethyltryptamine (DMT) upon death. Would it be possible to force the pineal gland to release this DMT while still living?
3
votes
2answers
87 views

EM Brainwaves VS Brain Wave (EEG) [closed]

The brain purportedly produces very weak EM waves. EEG is a method of measuring electrical brain activity, it has classifications for the types of brain wave it can detect: Theta, Alpha, Beta, Gamma ...
5
votes
4answers
210 views

Why has evolution made neurons use spiking?

I'm going to be forward and say that I'm not a biologist. I don't claim to fully understand the functionality of a neuron from an electrical/chemical perspective... I'm curiously gazing from the ...
1
vote
2answers
91 views

How precise is EEG?

Imagine we want to read impulses within single neurons in the brain. Can we do that now for a single region within the brain? If not, what is the smallest region that can be monitored for an activity ...
4
votes
2answers
99 views

What is the biological principle of this “holotropic breathwork” technique?

Holotropic breathwork is a non-drug technique developed by Stanislav Grof used in psychotherapy. The therapy as a whole is usually called holotropic breathwork (at least by Grof himself) and will most ...
1
vote
1answer
83 views

Recalling memories by electrical impulses?

I've read that in an experiment, a pair of stimulating electrodes were inserted into a blind man's visual cortex, and upon passing electricity, the phosphene phenomenon was produced. Is it the same ...
6
votes
2answers
175 views

How would the human body adjust to sleep times if we were to live in a place with different day lengths?

You sleep at night and are active during the day that's how things work for humans, but theoretically if a human whose parents lived on earth were to be born in another planet resembling earth but the ...
2
votes
1answer
154 views

Why does chewing enrage me?

Whether it's snacking on chips, munching on salad, or simply chewing gum, when I hear someone do it within an earshot, it drives me completely bonkers! It doesn't matter if it's my girlfriend, my ...
4
votes
0answers
44 views

How does the frequency of a visual stimulus affect the steady-state visually evoked potential?

I want to make a project for EEG signal processing, and in my research I found the concept of SSVEP, which means that if you have a stimulus with low frequency applied to the eye, the electrical ...
12
votes
1answer
3k views

Supercomputer Vs Human Brain

With supercomputers doing calculation in petaflops ($10^{15}$ Calculations per Second), have we crossed the speed of Human Brain?
3
votes
1answer
79 views

How Behind is the Human Mind (Latency of the Senses)

I would like to know if there is any research into the latency of human perception. Particulary: What is the minimum time for various inputs (vision, touch, sound) to be recognized by the conscious ...
2
votes
1answer
54 views

When a thought 'crosses your mind', does it literally cross between left and right cerebral hemispheres?

I've heard that part of cognitive processing is information passing between left and right cerebral hemispheres. This is what happens in the Cerebral Cortex which is divided into two hemispheres, ...
10
votes
2answers
650 views

What happens once a brain is full?

I just read the answer to this question, and it got me thinking... If the human brain (or any other brain) has a finite amount of storage, what would happen once the brain has taken in its maximum ...
4
votes
1answer
422 views

Is there any size limit to the amount of information a human (or other) brain can hold

Im not sure how this would ever be tested but is there a limit to how much the brain can 'hold' before it reaches capacity ? I guess this could also be interpreted in terms of memory, as how well ...
2
votes
0answers
296 views

What “emotions” can a snake feel?

Short: Thinking in particular of a Royal Python (US: Ball Python) such as some people keep as exotic companion animals, what sorts of "emotions" or "feelings" are they capable of? Long: ...
1
vote
1answer
63 views

Is it possible for neurons themselves to manifest cancerous behavior?

From what I understand, one form of cancer is a faulty gene responsible for the programmed death of a cell. Not long ago, popular wisdom used to say neurons don't regenerate. However that is no ...
2
votes
0answers
60 views

What causes headaches (biologically)? What does it mean directly? [closed]

Even though your brain can't feel pain, thingies in your head are installed to compensate for that. Once I thought your head starts to hurt when your brain is tired. I can't believe this any more. ...
3
votes
2answers
153 views

How is information sent from limbs to the brain exactly?

Say you have a needle, and you poke a very specific area on your left thumb. A signal gets sent from that nerve up your spine and into your brain. How does the brain know exactly where this signal ...
3
votes
1answer
68 views

Brain response frequencies while sleeping

I'm not sure if this is the right place to ask this but Biology seemed to fit best. I'm trying to find out what frequencies the brain responds to best while sleeping. The reason for this is recently ...
3
votes
0answers
93 views

Electrodes in the brain and 'repetitive orgasms' [closed]

The advent of chlorpromazine in 1955 put an end to one of the more bizarre chapters in American psychiatry.$^1$ Dr. Robert Heath implanted wires or delivered injections of acetylcholine (a ...
8
votes
2answers
740 views

How long does it take for memory to disperse after death?

1: There seem to be cases where coma patients with a non-active brain (i.e. flat EEG) have regained full consciousness. => Apparently memory and knowledge are stored independent of brain activity. 2: ...
6
votes
2answers
1k views

How are babies born without a brain?

In the United States, anencephaly occurs in about 1 out of every 10,000 births. There are several forms of this condition, wherein the forebrain is absent. The forebrain is host to most of the higher ...
3
votes
1answer
70 views

Biological advantage of electric synapses

Electric synapses are synapses that do not process information but simply foward one action potential from one neuron to the next. There are no neurotransmitters, no inhibitory and exitatory ...
2
votes
1answer
128 views

Can a brain be transplanted?

Is it possible to transplant a brain and would it keep the memory? If not, what would be the prerequisite to transplant one?
3
votes
0answers
62 views

Is there a correlation between brain size and amount of sleep? [closed]

As far as we know, sleep seems to be the part of the daily cycle when executive functions are resting and memories are fortifying. Many, but not all, of the functions that become dysfunctional upon ...
2
votes
2answers
2k views

Which hormones can cross the blood brain barrier?

Can hormones such as testosterone, aldosterone and estrogen cross the blood brain barrier? I looked on Wikipedia and there no mention of it in the testosterone article. Through Googling around I also ...
3
votes
1answer
83 views

Is there a hormone combination that makes humans grumpy?

Imagine a typical situation that is likely to give rise to a bad temper within an individual: a person is awoken very early in the morning by a sound of a lawn being mowed next door. Unlike expected ...
15
votes
2answers
348 views

Can parts of a human brain be asleep independently of each other, or vary in the times required for them to fall asleep?

I know that some birds and marine animals can continue complicated activity (swimming, flying?) while one hemisphere of their brain is asleep. I'm interested if human brain has some parts of it that ...
5
votes
3answers
202 views

Can children restore brain cells?

By "children" I mean young people at the age of 10 or lower. I know that the adult brain cannot restore brain cells, but what about children? I mean, the brain must develop from a few cells to a 90 ...
1
vote
1answer
54 views

What happens when we dream?

When a human dreams does the brain activate the cones and rods in the eyes creating the images we see in dreams?
2
votes
1answer
92 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
vote
0answers
25 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
votes
1answer
175 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
335 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 ...
3
votes
1answer
53 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
votes
2answers
325 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
69 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
vote
1answer
48 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
votes
3answers
217 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?
4
votes
1answer
167 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
78 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 ...
4
votes
0answers
115 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
88 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
68 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 ...
2
votes
1answer
65 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) ...