Questions tagged [brain]

Tag for questions regarding the brain. The brain is the portion of the central nervous system that is located within the skull. It functions as a primary receiver, organizer, and distributor of information for the body. It has a right half and a left half, each of which is called a hemisphere.

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Do brains work in a probabilistic way? [duplicate]

I have a belief that our brains work in a way that calculates the probability of anything in life, even simple stuff, Ex: When someone sees a glass of water from afar he guesses that it's water by a ...
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in this attentional blink experiment why is the second letter visible when the lag is low but not when the lag is high

this image is from the book Consciousness and the Brain by Stanislas Dehaene the book describes the image as follows : The attentional blink illustrates the temporal limitations of conscious ...
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How do we know that neurons are the only cells involved in cognitive computation?

I am an undergraduate studying pure mathematics taking a class on computational neuroscience. My default lens for looking at the brain is in terms of universal computation (in the Turing machine sense)...
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In pyramidal neurons, are there any differences (morphological or otherwise) between the basal synapses and proximal synapses on the apical tuft?

In pyramidal neurons, are there any differences (morphological or otherwise) between the basal synapses and proximal synapses on the apical tuft ? As far as I know, they both have dendritic spines, ...
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How many stories can the human brain discern? [closed]

Perhaps the question will seem strange and not clearly formulated, for which I apologize in advance. Are there estimates of how many stories the human mind can discern? For example, let each story be ...
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Switching up senses

What if you change the connections of the brain to where the eye is connected to the part of the brain that creates taste. Will it start to adapt and begin to see with that part of the brain? Or will ...
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What causes the perception of time

I've recently watched veritasium video about time perception. And what i got out of that is that the more are brain is being used up the slower time goes and the less we use the faster it goes. Is ...
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Why does a human mind repeat the same mistakes? [closed]

Why does a person go on repeating the same mistakes again and again even if he does not want to? He knows that he is going to regret it later since he has already repeated this several times in the ...
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Does all motivation and desire originate in the limbic system?

My current understanding is that subcortical structures in the limbic system determine what we desire, and that the prefrontal cortex is essentially an uncaring tool utilized by the limbic system to ...
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Is language an abstract concept that is voiced out though a national tongue?

When discussing with my son about a possible future (from the progress of technology point of view), he mentioned that it would be great to have a brain implant that would finally allow everyone to ...
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How is sexual arousal different in men and women?

I was watching ASAPScience video on the Male vs Female Orgasms. At 1:45 they say that PET scans of brain show that arousal of men and women are different. How exactly are these different, as in what ...
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Is Tinnitus caused by damage to the dorsal cochlear nucleus (DCN) or Auditory Cortex, which can be repaired?

It is well known that loud noises can lead to hearing problems such as temporary hearing loss or tinnitus (ringing in the ears) and even permanent hearing loss. But this is the first time scientists ...
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Is there a formal name for the effect of searching an item while holding it?

I've heard some experiences of some friends in which they explained that they started searching an object to then realize that they were holding it. For example, today, a friend of mine told me that ...
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How do "ideas" or "concepts" appear in the brain?

I'm new to neuroscience and psychology and recently learned about Hubel & Wiesel cat experiment where "some neurons fired rapidly when presented with lines at one angle, while others ...
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Can a brain outgrow its skull, or have other notable phsyiological effects from increased size or mass?

You may be aware of a famous story which found that Taxi Drivers as well as Super Mario 64 (3D adventure game) players showed a an increase in grey matter located in their hippocampus. https://www....
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Has there ever been a split brain pianist?

Has there ever been a split brain pianist? I was thinking about this yesterday and it occurred to me that a split brain pianist might have an advantage over a non-split brain pianist; they could ...
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How would a human baby's brain develop if born in a sensory deprivation chamber?

According to Scientific American, people who are blind can learn to use their sense of hearing more efficiently. Similarly, deaf people, may learn to utilize their vision more effectively. While the 5 ...
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How does our brain remember reminders?

I was wondering about a rather remarkable phenomenon regarding how we recollect reminders. I've read stories where people keep a pillow, or even figures and dolls, near their door to make them ...
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What is meant by the so often heard phrase that we only use 12% of the brain?

I have heard it so often that we use only 12% of our brain. I truly don't understand this. All neurons in the brain are are firing within a small amount of time. Even in my sleep this is going on. ...
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What makes us feel that one person is more beautiful than the other? [duplicate]

What makes us feel that one person is more beautiful than the other? What makes some facial features attractive but some unattractive? Why a sharp nose, smallmouth, blue eyes, bright complexion, ...
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Is there a program in the brain?

In a digital computer the are data, zeros and ones, stored in a material medium. A program is stored in a material medium too. This is implemented in the form of zeros and ones too but the two ...
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What is the difference between the processing of visual information and auditory information?

We can read: The visual cortex is located in the occipital lobe of the brain and is primarily responsible for interpreting and processing visual information received from the eyes. The amount of ...
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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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Does the brain contain chaotic systems, akin to the weather or planetary orbits?

I was wondering whether the brain contains processes that are chaotic in nature i.e. subject to great variance in the long run given minutely different initial conditions down to quantum fluctuations, ...
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Is there a mechanism behind savantism shared by all savant cases (both congenital and acquired)?

Kim Peek (the real-life inspiration for Raymond Babbitt in Rain Man) had a spectacular case of savantism. He also had disabilities, like missing his corpus callosum and anterior commissure, leaving ...
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Why do larger animals need bigger brains?

For example, we can assume that the average house cat is equally intelligent as the average tiger. The average tiger is about 100 times heavier than the average house cat. But its brain is also bigger ...
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What comes first? Thought or electric activity?

Our thoughts are basically the result of the electro chemical activity which are happening in our neurons. The signals sent by different neurons to each other back and forth create a pattern which we ...
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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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How are neurons able to effectively communicate when there are way more dendrites than axons?

Neurons can have up to 100,000 dendrites and typically only have a single axon. This means a neuron typically has a very large number of inputs while only having a single output. Surely you can see ...
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Does our brain unconsciously keeps track of time? [duplicate]

I’ve had multiple experiences lately where I didn’t look at my phone for a while and then right before I looked I made an approximation of the time and most of the time that approximation was right to ...
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Why is intensive mental activity so tiring if it just spends a bit more energy than in relax?

As far as I know intense mental activity supposes spending about 1% more energy than what you would spend by basically making no real effort in any mental activity. If that's the case, why is so ...
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How do psychedelics work? [duplicate]

I realize my question is more of a pharmacological one than a neuroscientific one, but I didn't know where else to ask this question. As far as I've read, there's two components to how psychedelics ...
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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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1 vote
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Can the human brain be simulated by a computer?

There is a Wikipedia page on brain simulation, but: Question: Could there be (experimental) evidence that the (human) brain cannot be simulated by a computer? Note that the Wikipedia page Mind ...
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What are higher-level and lower-level brain functions?

The human brain can be described as a "Russian nesting doll" in the sense that the most ancient areas of the brain responsible for lower functions are located at its centre while newer ...
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How does the brain interpret electrical brain stimulation?

I believe I understand the natural path, in which stimuli appear and by neural plasticity our brains "learn" these stimuli. I recently learned about electrical brain stimulation and I was ...
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Where to find modern theories on how the brain computes inputs and information [closed]

I am a software engineer with a special interest in machine/deep learning and I have a fair amount of experience in this space. In (supervised) machine learning, you are tuning a (very) large data ...
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1 vote
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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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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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How do neurons know where to send transmitters?

If a single neuron can have thousands of synapses with other neurons, how do each neuron "knows" to which further neuron to send transmitters? i.e. selectivity
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Reaction when light is turning on and off

This question comes from a personal experience I've had over the last few days, 'experimenting' on my own. I have a light bulb in a room that is turning on and off periodically, let's say per second. ...
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2 votes
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In principle, could a brain be rewired to experience more pleasure and/or pain?

I'm not sure if these are two separate questions, but I'm curious: in theory, could an existing adult mind/brain be modified to perceive pleasure/pain signals more intensely than otherwise? Without ...
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Could you inject external gamma waves into your brain safely?

I've recently taken up the study of neurology, and I was wondering if you could create a device that would input gamma waves into your brain. And if it would be safe. Suppose you had a device that you ...
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From a general perspective, why are we more likely to remember wanting to do something, but not specifically what it is?

I have experienced several mind pops and instant recalls based on triggered events, and some might come suddenly, or they might gradually appear. Sometimes, though, I remember something that I would ...
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1 vote
1 answer
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how does our brain know how to provide the right instructions to pronounce words?

Children learn to speak by hearing others and then trying to pronounce these words. What I don't understand is: how does their brain know the right instructions to give to the tongue, lips and the ...
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Biological Neural Network Modification to Unlearn Understandings

Lets assume that a person grows up thinking that religion X is true religion. So he builds up a profile in ones head and when notion of religion X appears the neurons that is related are fired, giving ...
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Cerebrum and Cerebellum split?

What happens when cerebrum and cerebellum are surgically separated (or partially separated)? Is this lethal, and if not, what are consequences for brain operations?
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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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2 votes
3 answers
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Does the mind create the body?

Everything we perceive is through the 5 senses. That means the body which is perceived through sense of feeling and seeing is also formed as an image in mind or brain? Is it correct that it is either ...
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Function of the Left Medial Prefrontal Cortex

I am searching for a specific (as specific as is currently known) region of the brain that has a known(?) large role in deductive and inductive reasoning. My research has narrowed me down to the Left ...
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