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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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How to find papers about voltage imaging (with GEVI) for human brain research?

I would like to follow the Nature article https://www.nature.com/articles/d41586-018-06694-6 about voltage imaging of brains, about use of GEVI - Genetically Encoded Voltage Indicators. But I am ...
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Does the brain have a clock and can it be sped up?

Before i start, I'm an engineer and have very limited knowledge on biology and neuroscience. My question is, does the brain have a clock like a computer where it has a set processing speed? Clocks in ...
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Is a fish a type of computer? [closed]

Discuss. On what level would it be possible to state that organisms are processers of electrical and chemical information and hence similar to a computer?
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Can an epileptic seizure start in the spinal cord?

My understanding of an epileptic seizure is caused by "invalid electrical signaling" in the brain. Can these start from the spinal cord (outside the brain) and move into the brain and cause an ...
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How do Neurotransmitters get into the neurons?

This may be a dumb question. I'm not a Neuroscientist. I'm just trying to learn more about the brain to improve my AI learning algorithms… I understand that there are different kinds of ...
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What will be the deficits when left half of the brain is removed in adults?

Hemispherectomy is a surgical procedure to remove half of the brain. It is typically done on children with severe epilepsy. What will be the deficits when left half is removed in adults? Is aphasia a ...
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What is the reason behind that sometimes when I see new thing I feel that I have already seen them?

I have googled it and I found that it is, because of good memory, but how it can be due to good memory as it didn't happen before. It happened to me many times, that I feel that the scene which is ...
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Is it possible to grow brain tissue in vitro? Can we make a super-brain this way? [closed]

I wonder whether such experiments were conducted? Is it possible to create a "biological super-computer" this way?
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Energy consumption of the human brain: thinking vs not thinking [duplicate]

I'm wondering about the human brain's energy consumption at different "uses". If you use a muscle it uses more energy than if you hold it still. Is the brain like this, or is it "always on" like a ...
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What is 'brainfreeze' and what are its cautions and how to leaa down its risks?

How we will exactly ellaborate the concept of brainfreeze in accordance to brain functions, how is it caused and how we can less its risks?
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1answer
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Does mother feed information?

Does the mother feed information to the child in the fetus? If so, How is that done? IF not, How can the just born baby breath involuntarily if brain doesn't know it should generate impulses to ...
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1answer
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Is the structure of human brain white matter fixed at/near birth?

I have been reading that, with exceptions for a few parts of the human brain, no neurogenesis occurs, so no new neurons are created. I have also heard that no new axons are formed through the white ...
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Why Is Gray Matter Gray?

There are different people giving different reason for this popular one 1) white matter is mylinated .this reason was given in reference and few website like this while others say 2)cell body ...
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Can cognitive functioning of the human brain change the physical state of the brain? [closed]

Can cognitive functioning of the human brain change the physical state of the brain? E.g. does self-awareness, self-reflection change the number of neurons or synapses among neurons? I.e. I am trying ...
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1answer
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Flow diversion for cerebral aneurysms or stabilizing the hemodynamics?

I'm doing research of flow diverter for cerebral aneurysms applications and I'm wondering the reason behind stent placement underneath of cerebral aneurysms is to divert the flow or stabilize the ...
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How do the neurons inside a frog's retina become able to detect features, for example edges?

I know that the retina of many animals can be thought of as a CNN - there are certain areas and layers inside the retina and the neurons fire so that after a few steps the brain receives that a ...
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Can a brain dead person recover?

Many times I have heard someone having to pull the plug because the patient was declared brain dead before the body healed fully? Why do they pull the plug without first waiting till the body/brain ...
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1answer
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Its there a gene or genes for intelligence?

I don't know almost nothing of genetics but I felt a little interested in the subject of genetics and its role in intelligence and i found to reports that talk about certain genes that contribute to ...
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Why and how does falsifying sensory information work? [closed]

Some context, before the question: Whenever I have a craving to binge on something sugary, I just prepare a cup of extremely bitter green tea (with 3 bags of tea) and I imagine myself binging on ...
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Why is the hippocampus considered to be a cortical structure but not the amygdala?

I'm having some trouble understanding the anatomical differences that classify the hippocampus as a cortical structure but not the amygdala. I have included the screenshot of a diagram from Gray's ...
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1answer
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If fully colorblind people only see shades of white,gray, and black, does that mean that the colors black, white, gray are colors humans can’t see? [closed]

And since the brain can be tricked to thinking that objects with mostly black and grey gradients are moving, like optical illusions, does that mean motion has a color?
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1answer
61 views

How do our eyes see an inverted image? [duplicate]

How exactly do our eyes see an inverted image of what we are looking at? Does it have something to do with the shape of our lens (i.e. convex)?
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How are innate reflexive thoughts passed down?

Human babies seem to know how to swim. They also have other innate behavior such as sucking thumbs, nipples, etc. and having a tight grip (to hold on to the mother). It seems that humans are not the ...
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Any volumetric data for areas of the brain?

I was trying to write an overview of AI and wanted to quantify some numerical data about the brain. It is easy to find many sources quoting 100 billion neurons. However, I would like to get the ...
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Camera and the eye (filtering information)

How does a camera recreate a very similar perceptual stimulus (through the photo) for us to see compared to the person directly viewing the object of interest with their eye? My questions stems from ...
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Are saturated fats beneficals for the brain's functions?

Are saturated fats beneficals for the brain's functions? if so, which kind of saturated fats? I found this information about medium-chain triglycerides (found in coconut oil), 1)it is smaller than ...
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1answer
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Specific Neurons that Require Glucose

I've been doing a bit of armchair biology lately, and have been interested in the metabolic flexibility of neurons. My understanding is that, besides glucose, many neurons can metabolize lactic acid ...
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Where does the human brain drain to?

When a brain has a aneurysm and the patient survives untreated then where does that blood drain to or how is it absorbed? How is the pain perceived?
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1answer
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What are ECT parameters?

ECT or shock treatment is used to treat psychological disorders. How much voltage, current and duration is used for this? Wikipedia mentions a treatment of 0.8 Ampere for 5 seconds.
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1answer
51 views

Lower affinity drugs longer time for pathways to rebound?

Do lower affinity drugs take a longer time for pathways to rebound? Affinity has to with strength of activating a receptor others options. Do those with stronger affinities result in more likelihood ...
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1answer
56 views

How fast does activity affect synaptogenesis?

How long does it take for the increased activity due to a novel stimulus to cause an increase in synapse generation? There are many studies which show that the number of synapses in the brain ...
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At what rate does synaptogenesis occur in adults?

From many articles, I can find the rate of synaptogenesis at its highest: roughly 580,000/minute (weeks 6-23 after conception). However, I'm having trouble finding the rate with which it occurs in ...
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805 views

Inverse Agonist vs Neutral Antagonist

Could somebody explain in simplest terms the difference between inverse agonist and neutral antagonist? Which one is more well natural and less likely to cause pathways to rebound? Does neutral mean ...
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1answer
56 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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1answer
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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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What does +60mm mean in MRI scans?

What do the -30 to +60mm markings mean in this MRI scan image?
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1answer
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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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1answer
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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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1answer
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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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1answer
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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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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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1answer
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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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1answer
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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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1answer
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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165 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?