Questions tagged [brain]

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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62 views

Can you extract specific data from EEG

First of all, sorry if this is the wrong place to ask this question, please redirect me if it is so. I have a project in mind involving and EEG, which is the following : Using a "consumer-grade" EEG ...
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Why does doing more physical labour reduce the prevalence of disorders like OCD?

This just an observation without any study backing it. But people who do more physical labour as opposed to sitting at the couch really do have less rates of OCD. Why this association of physical work ...
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Do brain consume more energy when stressed or Anxious

When a person is anxious or stressed or suffering from chronic depression, it is observed that the person is usually tired. Is there there a connection between fatigue and racing thoughts/obsessions. ...
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Why do you get prion diseases from eating animal brains but not other parts of the animal?

Eating animal brains is considered a delicacy in parts of China. We know that eating animal brains can lead to prion related diseases. Prions are misfolded proteins that are potentially infectious. ...
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425 views

What does +60mm mean in MRI scans?

What do the -30 to +60mm markings mean in this MRI scan image?
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How do we see and/or detect neurons? [closed]

I'm curious as to how we "see" neurons, for lack of a better term. Is it the detection of the neuro-transmitters? Can we literally see the electricity firing and moving throughout the pathways? Is it ...
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Which kind of electrical brain activity is associated with consciousness and why?

According to this article The ethical brain At the end of the week 5 into the 6 (42-43 days) the first electrical brain activity occurs in a pre-born developing human. And according to the same ...
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60 views

Consistency of consciouness [closed]

So I was wondering if consciousness is continous and I found out it might not be the case. But in that case it begs a question, what if in every frame of consciousness my old me dies and new is reborn ...
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27 views

What do the column labels in this table mean?

This table shows the effect of sound (song and tones) on female birds. However, I'm not sure what the labels (F1 22, P and η2) mean. I've seen the labels on other tables too. (from https://www.ncbi....
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62 views

Why is the nucleus accumbens in that place?

This description of where the nucleus accumbens is (Ac) says that it should be near the lateral ventricle, when it is quite clearly very far away? How is this? the region surrounding the tip of the ...
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56 views

What is this type of diagram called and how to interpret?

I'm just starting a project on neuroscience for sixth form. I have had no teaching in this area so had to teach myself entirely. This is a "low-power image of a transverse section through the ...
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Are there any known rules that neurons always follow while transmitting/receiving signals?

I'm new to neurobiology so I don't know much about it. However, I have worked on artificial neural networks. Man-made AI networks all follow a handful of simple rules. I was wondering if biological ...
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58 views

A Brain Implant improves memory--but how?

https://www.nytimes.com/2018/02/06/health/brain-implant-memory.html A new therapy could improve memory by "sending electrical pulses to aid the brain when it is struggling to store new information." ...
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What are the differences (if any) in brain activity when hallucinating versus perceiving a real object?

I was wondering if there is difference in brain activity when someone is hallucinating an object, say a giraffe compared to when someone is genuinely observing a real giraffe?
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Do cells store information other than permanent (chromosome) information

The brain stores information in neurons (i.e. neural networks), and cells store information in DNA. But with DNA, this is permanent information. There is a lot of potential temporary information in ...
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203 views

How to find the age of a memory stored in the brain?

Is there any way to find how old one's memory is? One can find the age of stones, plants, animals, etc. So why not find the age of a memory stored inside one's brain?
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What is the heritability of brain gyrification?

Brains of mammals with a folded neocortex do not have identical patterns of folding in the same species. Do two genetically identical individuals of a species have the same pattern of brain ...
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59 views

What is the difference between how motor function is controlled in cerebrum vs frontal lobe?

At least according to wikipedia, the frontal lobe houses the primary motor cortex, but in a different article about the cerebellum, it says the cerebellum controls motor function. So, do both parts ...
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Processing of speech/non-speech sounds in the human brain

I have a ""which came first: the chicken or the egg?"-kind of question regarding the processing and understanding of speech / non-speech sounds in the human brain. I'm wondering whether speech and ...
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601 views

Why ambidextrous persons are so rare?

According to this article, only about 1% of all humans are ambidextrous: About 90 percent of people are right-handed, says Corballis. The remaining 10 percent are either left-handed or some ...
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91 views

Dopamine involvement in pleasure

There are some psychologists who believe that dopamine is not released during pleasurable activities but before them; my understanding is that a little dopamine is released pre-reward in order to ...
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3k views

Is there any danger in putting a magnet in your ear (next to your brain)

I recently bought some wireless earbuds that fit right in my ear, so they're very small. But the method it uses for charging is magnetic, so it has magnets built into the earbud. I was wondering if ...
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432 views

What is the exact frequency of Delta brain waves during Slow Wave NREM Sleep?

I saw a TED talk about researchers playing pulsating pink noise while a test subject is in Stage 3 Non-REM / Slow Wave / Deep sleep and observing an increase in Delta wave EEG activity. This seems to ...
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137 views

Does severing the Corpus callosum, effect the brain's communicating ability?

With serious epileptic seizures, a treatment is to sever the corpus callosum, which stops the seizures. However, does this affect the communicating ability between the two hemispheres? Or how does ...
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Is it possible to lose weight doing brain exercise?

According to this article human brain consume a comparable amount of energy with skeletal muscle. So is it possible to do some brain exercise (calculate something in mind etc.) instead of physical ...
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65 views

What happens to the language processing brain part if no language is ever learned?

Language is processed in the human brain in multiple regions. Some of them seem to be used exclusively or mainly for language processing, other regions are distributed overlapping with other functions....
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How does the brain’s limbic system work together to form a working memory, short-term memory, and long-term memory?

In the past few days, I was reading about the limbic system and how its components (hippocampus, hypothalamus, thalamus, etc.) cooperate. Among papers and forum posts I read about how those ...
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128 views

How fast the brain recover itself at sleep? What can be done to accelerate this process?

In Computer Science we have "Big O Notation" to describe how efficient is an algorithm at processing some task. Those can be linear, time constant, exponential among others. Using that analogy, How ...
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2k views

Ipsilateral vs contralateral side of body

I know that the dorsal columns carry ipsilateral information. Is this fact relative to the dorsal column in question? If I want to talk about the right dorsal column, then the right side of the body ...
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brain and fingers movement theorie

I heard somewhere that when we want to do a repetitive movement of one finger (ex the index) . Our brain (in a very crude way) sends a first message to move all the fingers, and then a second message ...
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Are male and female brains physically different from birth?

Male and female brains are wired differently according to this article: Maps of neural circuitry showed that on average women's brains were highly connected across the left and right hemispheres, ...
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Evolutionary explanation for hypoxia causing euphoria? [duplicate]

Why would something potentially very dangerous, such as hypoxia induce something pleasurable like euphoria? Are there any evolutionary hypotheses for this link? I'm thinking that something like the "...
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417 views

Why does excess dopamine activity in the pleasure centers results in less pleasure in schizophrenics?

According to the dopamine hypothesis of schizophrenia, there is an excess of dopamine in the mesolimbic pathway (nucleus accumbens), and this contributes to the positive symptoms of schizophrenia. I ...
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An introduction to nuclei in the pons?

I have a couple of questions regarding the nuclei in the pons, thus I figured it would be best to frame the main question in the way that I did. My main question, however, is whether the basal ...
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84 views

Reference request - Neuroscience of Free Will [closed]

I am a computer science student taking a course on philosophy. My topic of research is on freedom of will and whether it is possible to create a machine capable (or closely) of doing so. I felt that ...
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81 views

Since the matter in the brain is recycled every few days how does consciousnesses work?

Since parts of the brain are recycled every few days does that mean that materialistic theories of consciousness don't work?
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348 views

Where does the initial action potential come from?

When talking about action potentials we say that previous neurons caused an action potential in this neuron and that this neuron's action potential caused the same in further neurons. But what is the ...
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What in the brain has gone awry during sleep paralysis?

I experience episodes of what I assume is sleep paralysis (lasting ~ 10-30 seconds) a few times a year, where I'm conscious of being somewhat awake but unable to move. I can hear, but not see, and am ...
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110 views

Neuroscience of confusion

How does (neuro)science characterize "confusion" that occur to "healthy" persons when engaged on a particular mentally-intensive task? I would exclude the case where we are rationally and with clear ...
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61 views

Is it possible to affect a brain with electromagnetic waves? [closed]

A human brain can generate electrical signal. So it generates magnetic field as well. Is it possible to affect a brain with electromagnetic waves?
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1answer
115 views

Does the brain store information and personality traits in different areas?

I'm aware that muscle memory, language etc can remain largely intact after brain injury that impairs other forms of memory, suggesting that different kinds of memory are stored in different places in ...
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Cockroach brain functional anatomy

In insects like the cockroach the brain is distributed, i.e. some parts lie in the head and some in the abdominal cavity. Which part is responsible for controlling locomotion?
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Reference request: neocortex creating 11 dimensional structures

I've come across several pop science articles like this one that vaguely describe a method of analyzing brain tissue involving algebraic topology and 11 dimensional structures. They all seem to cite ...
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1answer
76 views

What is dendritic processing good for? [closed]

Can - on a very coarse level - the functional role of dendritic processing as a whole (at least one of possibly many functional roles it might play) be described as rewarding spatially coherent ...
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Simple model of dendritic processing

[I striked through some passages that might be misleading, resp. where I have been misled.] Is the following - very simplified - model biologically (or physically) plausible, explaining how ...
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1answer
98 views

Effect and functional role of voltage-gated channels on dendrites [closed]

I'd like to understand better the effect and functional role of voltage-gated channels on dendrites. What I believe to have understood: It is important that a more distal post-synaptical potential (...
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147 views

Number and function of voltage-independent ion channels

Googling for "voltage-independent" ion channels neurons doesn't give a good overview over the topic (and yields only approx. 50,000 hits, compared to 500,000 hits when searching for "voltage-dependent"...
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1answer
52 views

Does neural oscillation happen at the same frequency in all parts of the brain simultaneously?

Does neural oscillation happen at the same rate in all parts of the brain at a given time? I'm trying to learn and understand about brainwaves, and I know about the various categories of brainwave. ...
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646 views

Excitability of neurons

[The following includes a) two specific questions (at the end), b) an attempt to capture a dispositional concept (excitability) in geometric and physical terms.] I assume that "excitability of a ...