Questions tagged [neuroscience]

For questions on the structure and function of the nervous system.

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How much credence can you give to human cognitive studies using mice?

This question is concerning the question, How does the brain’s visual memory work? and the Neuroscience News (2020) article linked in an answer, talking about false memories. I have discussed false ...
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Does being sporty affect a person's reaction to emergency situations?

I have always been quite sporty, and I tend to remain relatively calm and composed in emergency or high stress situations. From my personal experience, people who are quite sporty and have been in ...
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Can some stimulants take the place of others?

I learned in class recently that neuroreceptors can cause different chemical changes in the brain and nervous system. I was told that stimulants increase heart rate and awareness, which got me ...
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103 views

The “Triune brain” model is obsolete, what is the name of the model that replaces it?

The Triune brain model suggests our brains evolved adding more layers, a lizard brain, then a mammal brain, then a new human brain. As that's false, and the same structures have become modified in ...
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Square root transformation of Poisson process. How Var[P(sqrt(lambda))] ~ 1/4?

I am working on Kaggle Neural data challenge. A number of spikes given a stimulus are Poisson distributed as $$Y_i \sim P(\lambda_i)$$ The mean and variance of any Poisson process is given as $$E[P(\...
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Do stronger emotions take longer to process with dreams?

One theory of dreams is they help us process strong experiences. So I wondered whether one needs a longer sleep after some strong experiences partly to give the brain longer to complete the healing/...
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Do neurons have a single transmitters vesicle per synapse they have?

Do neurons have a single transmitters vesicle per synapse they have? So when they will be activated, each transmitter vesicle is going to one synapse. Or is it that neurons release some amount of ...
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63 views

Do all neurons have a “job”, or are some waiting to be assigned for a novel stimuli to appear?

Do all neurons have something to do (i.e. all are activated for some known stimuli), and when a novel stimuli appear some of them change in some way so we can learn it? Or is it that we have "new&...
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If exactly one neuron magically disappeared from my brain, would my thoughts be significantly different?

If exactly one neuron magically disappeared from my brain, would my thoughts be significantly different? One can ask an analogous question about a single neuron (and/or its synapses) being magically ...
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44 views

Sleep/Dream and Logical Decisions

I discovered that sleep tends to mitigate the 'stress' that one gets by trying to deal with logical problems like work related tasks and general daily life tasks. Does sleep do this by removing the ...
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What is the size, volume, dimensions etc. of the central lateral nucleus in the anterior intralaminar thalamus in humans?

I have been searching extensively on the internet and journal articles for the size, volume, dimensions, etc. of the central lateral nucleus in the anterior intralaminar thalamus in humans but have ...
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Difficulties in recollecting memory, when execution speed of an action is slow

I learnt to solve Rubik's cube 2 - 3 years ago, I used to practice once in a while, I can solve Rubik's cube within a minute. One day, I went to my uncle's house, my nephew had a Rubik's cube, I ...
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What is the neuroscience behind copying dialect?

So everybody raised in the same area speaks with the same dialect, why is it so? What is the neuroscience behind this phenomenon?
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Calibrate noise dependent on the membrane potential

I would like to introduce current noise into the Hodgkin Huxley model to better represent the natural firing behavior of neurons - now I know that there are several approaches, but I would like to ...
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14 views

Any neuroscience related intelligence theories?

Correlations between biological measurements and intelligence has been made in the past, e.g. blood flow or metrics like cortex size, though are there any specific neuroscience related intelligence ...
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57 views

Can a student being asked a question trigger a true fight-or-flight response?

I have a professor who, in a lecture, briefly describes the neurophysiology of the "fight-or-flight" response. She states "in the hierarchy of information processing, emotional data ...
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31 views

Why do Na+/K+ ion pumps in neurons have a ratio of 3 to 2

As I understand it the resting potential is maintained due to the different permeabilities of K+ and Na+ and in fact at the resting potential the sum of the Na+ and K+ currents is zero. The pump's job ...
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recommendations for good books focusing on the reward system, motivation and addiction

As the title states, I would like to get recommendations for some good reads about the brain's reward system, motivation and addiction. In particular I'm looking for a book that assumes no ...
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34 views

How does the body respond to having excess levels of neuronal, not synaptic, serotonin?

If a person consumes large amounts of 5-HTP or SAM-e resulting in elevated serotonin levels in their synaptic vesicles, how is this excess offloaded? What is the average rate of clearance? All the ...
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26 views

Can one neuron denrdite be involved in different memories?

It's clear that neurons are involved in whatever memory. Suppose I see the image of a bird taking off over and over again. The image becomes imprinted in my memory. So when I think about this ...
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Non-polar hydocarbons in phospholipid bilayer

I read that the phospholipids in many cell membranes (I am referencing neurons specifically) have a non-polar hydrocarbon tail and a polar phosphate head. Regarding the non-polarity of the hydrocarbon ...
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26 views

Applying psychoactive drugs locally

I wonder if there are approaches to apply psychoactive drugs (more) locally, e.g. by drug carriers. Usually psychoactive drugs are taken orally/enterally and thus flood the brain unspecifically: each ...
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21 views

How well is biofeedback understood?

From an answer to the question Research suggesting conscious control over brain region activation? I have learned: »[S]ubjects become better at up-regulating or down-regulating activation in ...
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How is a memory lost?

Firstly, I have an incredibly rudimentary understanding of how neurons interact etc. My understanding of memory representation is that it's a group of interconnected neurons that fire in some ...
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59 views

Decussation of Cranial Nerves

Which cranial nerves decussate apart from the few nerve fibers of the optic nerve that do and how to easilly remember the cranial nerves that do? Here is a paper for the Trochlear Nerve But I have ...
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“Golder standard” RNA-seq datasets for neurodegenerative diseases

What's your favorite and/or "gold standard" RNA-seq datasets for neurodegenerative diseases? I come from the field of computational cancer genomics where there are some datasets that are well-known ...
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Neurological explanation for differences in what motivates runners?

I have noticed differences between how my friends and I are motivated with regards to exercise, and would like to better understand what is influencing this difference psychologically. Personally, ...
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Are there any psychological studies of thirst following food that account for SFO-Nos1 activity?

Some studies up to 2015 surprising found that salty vs. non-salty food doesn't make much difference to thirst. E.g. a 2015 study found that: However, according to Prof. Leshem, despite our gut ...
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Is there any empirical support to “chemical imbalance theory” for mental illness?

Has it been proved by measurement of chemicals in the brain that psychiatric disorders have either their origin or continuance due to chemical imbalance in the brain? I saw the documentary Diagnostic &...
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33 views

Averaging a linear or nonlinear function treatment

In a hypothetical PET study, my sample consists of a clinical population which exhibit brain hypermetabolism. I divide my sample into two homogenous groups. One receives a treatment whereas the other ...
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Somatosensory evoked potentials

I am wondering what the best EEG recording montage is to use for recording of electrically evoked somatosensory evoked potentials after median nerve stimulation?
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Negative Rewards(punishment) processing in Human Brain?

Can someone please tell me how negative rewards or punishments are processed in the human brain? Do we have a separate segment to process positive and negative reward and are the positive and negative ...
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Can reuptake absorb a selective or non-selective agonist?

For example, a lot of antipsychotics are chemically similar to serotonin, and at least partially trigger certain types of serotonin receptors. Is there any evidence to suggest that, because of their ...
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54 views

Can someone who is born a psychopath acquire empathy through conditioning and neuroplasticity?

Are there any studies of conditioning and neuroplasticity being used to bring back empathy to psychopaths?
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Neural field application question

I am following a class where we have just learned about so-called neural fields (the prof called them recurrent neural networks and said they are used to model large populations of real neurons). Now ...
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Neurogensis in CNS invloves apoptosis of scar cells?

Say there's neurogensis in a brain area that seems to "allow" it, like the Hipocampus, Striatum, and so forth. Does this neurogensis might be preceded in the apoptosis of scar cells, and then, in the ...
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223 views

Do central pattern generators control musical performance?

Are the sometimes very fast and complicated rhythmic movements and often long lasting patterns a musician performs while playing a piece of music generated by central pattern generators (in the sense ...
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33 views

Can sport be used as a counselling tool to help one deal with negative life events?

I found studies on how leisure activities can positively affect well-being, e.g. stress reduction. My question is more specific as I want to research how participation in sport can help one deal with ...
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How to cope with the problem of noise in fMRI?

The sounds and noises that a typical MRI scanner produces are problematic for several reasons: they give - annoying as they are - a strong feel of uncomfortableness to any subject or patient they are ...
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What's the relation between PES and LSA?

In "Learning by stimulation avoidance: A principle to control spiking neural networks dynamics" by Sinpayen et al. a learning rule called Learning by Stimulation Avoidance (LSA) is presented. ...
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Are there any approaches to measuring “physical”/“neurophysiological” aspects of one's intellectual tone/state of fluid intelligence?

Is it possible to measure/approximate/estimate intelligence with a physiological metric? What I mean is, if I put it correctly: to measure/estimate short-term memory capacity/long-term memory ...
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Mechanism of ketamine in treatment of depression and anxiety?

What are the mechanisms by which ketamine reduces the symptoms of depression and anxiety?
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How does aggression transferring work neurologically?

Psychologist often prefict phenomena before they are scientifically observed. For example they have known for a long time that if you don't think about something for some time, you forget it. This can ...
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102 views

What is the importance of Dissociation (Both Double/Single) in a Distributed Hierarchical Organisational model of brain function?

How does Dissociation fir with a Hierarchical Organisational model Like Luria's or Distributed model of Fellman & Van Essen? Also, how may patients do you think should be the minimal amount in ...
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Can we currently manually influence single neuron activation/deactivation

I know there are current methods to influence control of individual neurons through a technique called Nanoelectrode-mediated single neuron activation. However there is no indication as to the ...
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What happens to the motor region in the brain if people get paralysed?

Imagine a person that is paralysed because the connection between the motor region in the cortex and the motor apparatus in the body (neurons) is comprised. What happens to the neurons that were ...
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How is the brain divided in parts?

Now I can imagine the body being separated in parts. There is the liver, the bones, the skin, the eyes, the kidneys, the feet, the legs, or the brain. All these sub-units work together coherently and ...
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What is the cochlea frequency response by number of hair receptors

I am trying to recreate the cochlea/basilar membrane response to sound and want to know how the hair receptors are bucketed or binned by frequency, so and ideal list would be something like 10kHz-...
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Do people with sociopathy, neuroticism need medical attention?

Do people with sociopathy, neuroticism need medical attention? I thought people with dark traits don't need medication unless it causes them to have problem functioning in society like working with ...
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Is there a mechanism in neurons to temporarily increase membrane resistance?

I was just learning how electrical signals travel down the neuron and learned that electrical signal flowing out through the membrane significantly hinders the voltage to move down the axon. This ...