Questions tagged [neuroscience]

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

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27 views

Testing Multilayer Perceptron [closed]

The following script is from Trappenberg's Fundamentals of Computational Neuroscience and is used to test a perceptron's robustness against noise. However, how would one alter it to test the output ...
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22 views

How firing of neurons stimulate reality? [duplicate]

Iam just an enthusiast.When I look for how does our brain works it boils down to firing of neurons in a pattern. I read that all of our thoughts, memory is due to firing of networks of neurons in a ...
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Energy supply to brain

I wonder if the energy delivered to brain per unit time to maintain brain processes is limited and fairly constant? Is all provided energy fully used?
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18 views

Which area in the brain has the highest number of synapses?

Which area in the brain has the highest number of synapses or connections? I couldn't find any reliable link on the internet.
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60 views

Can eye tracking be used as a form of biofeedback?

I'm an occasional meditator and I've noticed that conceptual thought often produces eye movements, and I'm curious if anyone has tried using eye movements as a form of biofeedback. The Muse headset ...
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1answer
39 views

Where to find information regarding the effect of ion concentration in the brain on behaviour?

Hopefully this is the right area. but for some background, for a school project I'm currently trying to design a medically accurate zombie. I have half a semesters knowledge of basic physiology, and ...
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What happens to a nueron on a cellular level when stimulated by an electrode?

Considering Elon Musk's new Nueralink, the original Utah Array, and what happens to an individual nueron with long term potentiation, what happens to a nueron on a cellular level (and consequently ...
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Is a New Software Library to Simulate Natural Processes like Hunger Needed?

This sort of dovetails off a question I asked on the AI Exchange: Is There A Need For Stochastic Inputs To Mimic Real-World Biology And Environment? I figured this site would give more insight on ...
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1answer
56 views

Extra-classical receptive fields are surprising, but retinal ganglion receptive fields are not. Why?

Rao and Ballard (1999) start their paper by stating that extra-classical receptive fields, which exhibit the phenomenon of end-stopping are difficult to explain. They show that in an idealized ...
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86 views

Out of body experience tests. How to contact scientists? [closed]

I am 30 year-old man with cerebral palsy. Somehow that and one antispastic drug (baclofen) turned me into a vivid dreamer and out of body experiencer. I am not a believer, quite the opposite because ...
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What determines whether a monoamine neurotransmitter is recycled or broken down by MAO?

When a neurotransmitter detaches from the receptor and is returned to the neuron via the transporter, what are the primary factors that influence whether that molecule is re-stored in a vesicle by ...
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Understanding the transition from integrated form to ODE form of neuron models

I'm trying to convert a fairly complicated neuron model from integrated form (a form of the spike response model) to ODE form for use in the BRIAN simulator. The BRIAN simulator requires neuron/...
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35 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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65 views

Does thinking or focusing on something alter a neuron's speed?

I Googled about this but couldn't find any thing precise to be that does thinking about something hard alters the speed of neurons impulses? I have heard of neurons velocity being variable but want to ...
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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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11 views

Why do people suicide? [duplicate]

No, I am not talking about user suicide. I am talking about actual suicide. Isn't the fear of death naturally so big that people couldn't, but how do they? What would be tormenting them so badly that ...
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1answer
73 views

Could bioinfomatics explain consciousness?

There's a theory that consciousness is the result of information processing. Many speculate based on this that the brain is conscious because it is processing information. If this theory of ...
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20 views

What characterizes Grossberg's resonances?

Following Bryan Krause's advice I tried to be more specific and picked as one specific neural theory of consciousness Stephen Grossberg's Adaptive Resonance Theory in which a specific group of ...
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1answer
81 views

Which characteristics of neural activity patterns underlie conscious experience?

Which specific characteristics of neural activity patterns are unique for the cortex and neocortex as the presumed "seat of consciousness" and can only be observed there? Activity patterns having ...
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22 views

Neocortical potentiation vs slow wave memory consolidation in narcolepsy

Activity in the neocortex of the brain is significantly reduced during slow wave sleep. The general theory is that during that during this period of time memory consolidation occurs. Individuals with ...
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36 views

Retinotopic mapping to higher visual cortex

I know visual stimuli from retina presented in Cartesian coordinate is mapped to V1 as a form of polar coordinates. Wikipedia, Scholarpedia But I wonder whether this spatial representation in polar ...
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47 views

Neuronal mechanisms underlying delusional beliefs about one's thoughts

Are there known neuronal mechanisms that somehow explain phenomena like thought withdrawal thought insertion thought broadcasting i.e. deviating-from-normal experiences and beliefs about one's ...
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43 views

Whole brain death diagnosis and false positive

In view of the increasing need for organ transplants( possibly because of the greater ability of the surgeons and physicians to both execute the transplant, prevent a rejection, and/or diagnose the ...
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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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20 views

Functional neuronal units that occupy the same brain region

[Thanks to Bryan Krause's advice, I edited the question.] Definition: Let two functional units be two sets of neurons, A and B, such that the probability of being connected (synaptically or by ...
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34 views

Principles of grouping neurons

This is an overview question. I wonder which principles of grouping neurons into higher units are there, and which principles I have overseen. neurotransmitter systems: all neurons that release or ...
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86 views

What can coma patients report about their experiences - if anything?

Coma is correlated to a significant inactivity of the cerebral cortex and the reticular activating system, while other parts of the brain - e.g. the limbic system - might still show considerable ...
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37 views

Neural correlates of pleasantness and unpleasantness

There are some basic cases of stimuli that are typically experienced either as pleasant or unpleasant, e.g. the major third as opposed to the tritone. Assuming that there are different processes ...
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Functional vs. synaptic connectivity

I used to believe that connectivity is nothing but synaptic connectivity and thus a long-term concept: synapses grow and synaptic strengths change on rather large time scales. But recently I found ...
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1answer
55 views

Neurotransmitters by neuron types

I'm looking for a concise overview table of all types of neurons (whose number is at least in the hundreds) indicating which neurotransmitters they use pre- and post-synaptically (of which there are ...
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3answers
604 views

Predicting the individual effects of psychotropic drugs

https://www.ncbi.nlm.nih.gov/m/pubmed/23796468/ I have searched the national library of medicine but I could not find any papers about predicting both the therapeutic and adverse effects on the ...
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78 views

Are memories stored as patterns of chemicals/emotions?

Lately, I (as someone with no experience or prior knowledge in the topic) have been thinking about...thinking. The part that intrigues me the most is memory. As a computer-y type person, I tend to ...
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1answer
77 views

What is the brain doing when someone tries to solve a physics or math problem that they can’t make any progress on?

Is their brain actually working or is it day dreaming and not functioning if they’re staring at a physics problem and not capable of making any progress on it? When a student who can’t come up with ...
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90 views

How many different synapses can an axon form? How do they differ?

It is estimated that the in the human brain there are about 100 billion neurons. With thousands of synapses for each of them, the total number of synapses is over 100 trillion. Yet each neuron has ...
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Does speaking to self, use different area of brain as opposed to speaking to a person? [duplicate]

When speaking without the intent of communicating, but just to ones self or reading to ones self. Does this use a different area of the brain as opposed to speaking to a person, or even a device such ...
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How does our brain sense the passage of time?

How does our brain sense the passage of time? What is the mechanism? I am not asking here about memory. I have searched about it on the internet. https://www.scientificamerican.com/article/your-brain-...
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2answers
113 views

Is what psychologists define as subconsciousness proven in neuroscience and can the psychological subconsciousness be visualized by neuroscientists?

We read phrases like The subconsciousness makes up 90% of our brain. The subconsciousness makes up 95% of our brain. The subconsciousness can be influenced by hypnosis. I have yet to see a study in ...
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26 views

Is the approximation of the Medial Frontal Gyrus in the region of the Dorsolateral Prefrontal Cortex?

I'm wondering if the MFG is located in the region considered the DLPFC?
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1answer
43 views

What is receptor tonic activation?

From Long-term administration of the dopamine D3/2 receptor agonist pramipexole increases dopamine and serotonin neurotransmission in the male rat forebrain: The sensitivity of postsynaptic D2 ...
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50 views

Triptans and SSRIs

When talking about triptans used for migraines such as Zolimitriptan, such drugs are selective serotonin receptor agonists. SSRIs, as their function states, are Selective Serotonin Reuptake ...
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76 views

Strange synchronized brain pulses on EEG using OpenBCI Cyton board

I recently received an Open BCI headset, and have been experimenting with it. One interesting is my brain gives off very regular pulses. My wife tested the headset too, and she also had these pulses....
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449 views

Meaning of "projection" and "to project" in neuroscience

What is the exact meaning of the term projection and the verb to project in neuroscience? I haven't found any neuroscience reference book or dictionary that gives a definition, although those terms ...
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60 views

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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1answer
49 views

does the fact that Psychology Today take neurolinguistic programming seriously delegitimize the magazine?

According to Wikipedia, Neurolinguistic Programming is a pseudoscience and dismissed by most experts. However, Psychology Today, a popular magazine, appears to not thoroughly reject it. Does this fact ...
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157 views

what causes an action potential to propagate exactly and why should it propagate?

Hello I am taking a neurophysiology course and learned about the action potential and that it propagates in one direction from axon hillock down along the axon. I understand that action potential is ...
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60 views

Mechanism for deleting old memories

Do we have any mechanism for deleting neuronal connections? That is, if I learn a better version for doing something, I assume the brain will create a new neuronal connection, and we will use this ...
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2answers
181 views

What exactly happens to brain during anesthesia

While anesthesia is given to a patient what changes in the chemistry of brain happens. Which part of the brain is affected by the medicine which causes anesthetic effects. Can anesthesia be ...
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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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