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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Correlation brain size and muscle volume
I have 3 dogs that weigh ≈ 5 kg, ≈ 20 kg and ≈ 45 kg. The smallest dogs whole head would fit in the mouth of the biggest dog. Although I haven't measured it exactly but by just looking at the dogs I ...
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1answer
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What differentiates neurons in different parts of the brain?
For example: what makes a neuron in the hippocampus of the brain different from a neuron in, say, the amygdala, or the frontal lobe, or anywhere else in the brain? Do neurons in different parts of the ...
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Do lychees cause encephalitis?
In India, there is a recent outbreak of this disease after many consumed lychees.
Many people link this to lychee's "toxins".
I'm not a biology major hence can't elaborate further on this, but here ...
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1answer
102 views
Is gender identity a result of the outside environment?
This article says
"Sex is based on biological factors such as sex chromosomes and gonads [reproductive organs]," she said, "whereas gender has a social component and involves expectations and ...
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1answer
43 views
Does the nature of nervous impulses give us a finite number of things we can perceive?
This is a subject that is very disturbing to me and one that I've been obsessing over for years. I warn you now that this is probably not the sort of thing you get asked on this website and I'm not ...
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1answer
47 views
Do nerves work as I think they work and what does that mean for our senses?
Let me start off with a couple of metaphors.
In the third Lord of the Rings film, a signal for help is sent from Minas Tirith to Gondor, using a chain of beacons. When the keepers of one of these ...
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45 views
Is there a link between brain's energy consumption and human experience?
I was read the article (in Scientific American Mind) about energy consumption of brain. There are:
Say you are learning a new skill—how to juggle or speak Spanish.
Neuroscientists have made the ...
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How much is the motion speed of calcium ions in ion channels and neurons?
As far as I know, calcium ions moving in a Brownian manner are responsible for the performance of neurons and neuro-transmitters. My question is, how much kinetic energy these calcium ions have and ...
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20 views
How many neurons do we have in our forearm?
I am developing a neural interface, getting signals from the forearm and mapping them to hand gestures. The question we have at the moment is what is the upper bound of information bandwidth that we ...
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29 views
How would the brain represent represent elapsed time?
When we are waiting for an elevator, we know that the elevator will not open right away. There is a delay of 2 or 3 seconds. How does the brain (likely cerebellum) represent the running time of 2 or 3 ...
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62 views
Does our brain use up more ATP after smoking cannabis?
kind of an amateur here.
If the firing of the neurons' signals uses up some ATP, and smoking cannabis makes them fire off more quickly, do our brains use up more ATP to sustain that rapid firing?
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1answer
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Analysis of dynamic connectome data?
I have heard about existence of full brain connectome data of some worms or fishes. I have heard about GEVI - genetically engineered voltage indicators - that allow to see voltage data at subcellular ...
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Can humans read thoughts through technology? [duplicate]
Can humans read thoughts through technology?
Is there a way that humans can correlate the words a person thinks with the specific ideas that they portray or know what the words are themselves?
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1answer
204 views
What are the brain structures directly on top of the brain stem?
I have been trying to learn the anatomy of the brain, and some information on their functions, through an iPad app called 3D Brain. Whilst going through the different parts, I have noticed that one ...
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36 views
human sight at 1000x while looking into the mirror [closed]
I noticed that my eyeballs have the ability to see in what appears to be 1000x.
Setting the conditions: Look into a mirror while in a well lit room. (for me the lighting in my living room as opposed ...
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1answer
2k views
What's the difference between the neuroendocrine system vs endocrine system?
This is what I have understood so far:
Neuroendocrine system involved neuroendocrine cells (also known as neurosecretory cells) that receive nerve impulses by a sensory neuron to release ...
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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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2answers
133 views
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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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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1answer
161 views
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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21 views
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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1answer
64 views
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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1answer
46 views
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
100 views
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?
When I researched I found different reason for this, the popular
ones are
1) white matter is mylinated .this reason was given in reference books and this website
while others say
2)cell body ...
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75 views
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
41 views
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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2answers
577 views
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
98 views
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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1answer
56 views
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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1answer
328 views
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
49 views
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
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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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19 views
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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42 views
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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1answer
59 views
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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99 views
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
53 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
99 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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1answer
1k 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
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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30 views
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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81 views
Is it true reduction in sensitivity to dopamine due to over stimulation from addicting behaviors can be permanent, if yes how come?
I've read somewhat conflicting things.
General concept is this:
...
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82 views
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
75 views
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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