For questions about the biology of the nervous system, from a macroscopic to microscopic perspective.

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1answer
49 views

Do dissolving myelinated connections explain learning?

In order to understand how we get rid of established habits/behavior: Can myelinated connections be dissolved or are new connections created that bypass those connections?
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2answers
50 views

Are there specific neurotransmitters for specific sensations?

Nerves can detect pressure, temperature, light (eyes), sound, friction- at least. Does each sensation have its own neurotransmitter? I'm only a little familiar with neurotransmitters. This page ...
4
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1answer
59 views

Can dendrite spines fire action potential toward the soma?

I am confused about how the signal propagates from the dendrite spines toward the soma. I believe it is commonly taught that the signal diffuses "passively", i.e. electrostatically with no ...
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0answers
55 views

How much of brain power consumption is for information

As previously answered on this site, the brain uses 20W of power. However, how much of this power consumption is for information processing and how much of it is for maintenance of biological ...
3
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1answer
55 views

What is forward masking

I am trying to understand what is visual masking (or more specificaly forward masking). I have read the explanation here, but still.. I understand that a background can interfere with a frontal ...
3
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1answer
27 views

Where are intrinsically bursting neurons found in the mammalian brain?

There are neurons in the brain that exhibit bursting behaviour. In some cases, this is due to interactions with the surrounding neural network. In other cases, it is due to intrinsic biological ...
3
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1answer
118 views

Threshold time for stimulus to be consciously perceived. Why?

A visual stimulus must last longer than some threshold duration to be perceived consciously. For example, a light dot flashed for a duration of 10ms can't be consciously perceived. Why? What prevents ...
3
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1answer
81 views

link between top-down (bottom-up) processing and cortex layers

What are the relations between top-down and bottom-up processings and the flows of information in the brain? For example, does top-down processing start from some layers and go to lower layers? If so ...
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12 views

Where is neurogenesis absent/uncommon in the human brain? [duplicate]

I know that neurogenesis is an integral part of hippocampus, however are there parts of the brain where neurogenesis never or rarely happens? I'm assuming that any part of the brain stem does not have ...
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41 views

Neurotransmitter detection in the brain

How are the effects of drugs in the brain, in terms of neurotransmitters measured? For example, Selective Seretonin Reuptake Inhibitors are a class of anti-depressants. How was and is this type of ...
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0answers
85 views

What is the general frequency (or range of frequencies) of “sparks” in the human brain per minute and at what locations? [closed]

How many electrical sparks occur in the brain, on average, per minute and at what structures do they occur? For the "how many" figure, I would be happy to have ranges here from relaxed to excited ...
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1answer
57 views

How exactly do “you” think and interact with your body?

It has been established that our brains control many processes that your body carries out autonomously and involuntarily. However, other actions are controlled by you. (e.g. you lift an arm, you ...
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1answer
97 views

How to build a high sensitivity EEG headset for continual monitoring?

After having a conversation with a couple of the more popular "consumer" level EEG makers such as Versus, I have found that their monitoring abilities are either ...
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1answer
117 views

How many possible states does a brain have?

Suppose I have a box, inside of which is a light which can be either on or off: it has exactly two states. Suppose I wanted to take some "snapshot" of the state of this device, and store all the ...
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2answers
63 views

How long does it take for electrical impulses from neurons to travel in the human brain?

Consider the maximal distance between two separated areas in the human brain. How fast can information via neuronal excitement travel between these two locations?
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1answer
102 views

Quit smoking supported by mental training

Given that mental training/workout releases acetylcholine (something I read in a popular-scientific book and on Wiki, see also below) , and that acetylcholine and nicotine bind to the same receptors. ...
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1answer
222 views

How much power, in watts, does the brain use?

When IBM's Watson won on Jeopardy a few years ago, it did so using a room full of servers with a cooling system and a fat power feed, competing against a couple of humans powered by the equivalent of ...
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0answers
26 views

How separate are the left and right hemisphere vasculature?

It appears as if there are communicating arteries between the right and left hemispheres of the brain, but it is difficult to grasp the larger picture. To what extent is the blood supply to each ...
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1answer
83 views

Are there studies on the effect of nicotine patches on dream vividness and dream recall?

Acetylcholine plays an important role during REM Sleep. I cite an answer to the question "Why do dreams lose clarity quickly over time after we awaken?": Activity in the PFC during sleep may be ...
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2answers
98 views

How is saccadic movement managed in the brain?

I haven't been able to find any decent articles on this specific topic. So I have three (hopefully quick) questions: What part of the brain is actively controlling saccadic movement? If this part ...
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0answers
36 views

Source of sensory data related to cognitive effort

How does the brain assess cognitive effort? Is there a chemical that is being created or consumed at a rate that is proportionate to the amount of effort felt? I'm mostly interested in short term ...
4
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1answer
91 views

Interpretation & Actual Result of “10% of your brain” Myth

It is well known that the common myth that an individual only ever uses 10% of their brain is.. well, a myth. I had a question about a possible interpretation of this idea, and a follow-up question ...
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0answers
28 views

How to write a neuroscience research abstract?

I might have to start working on a research abstract for college soon, and I am looking for basic tips on beginning one. I don't mean information about the research specifically; I simply mean ...
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0answers
59 views

very weird Split Brain Dual Consciousness experiments references on Wikipedia

I have been reading about the problem of possible dual consciousness in split brain patients and I came across this wikipedia page about: ...
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0answers
45 views

Is the fight or flight response considered voluntarily or involuntarily?

I look in my rearview and see someone feet from me still speeding up and my heart rate feels like it doubles. It stayed like that for an hour. Had troubles concentrating and working well into the ...
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Why cerebellar input fibers use 2 ways to send a siganl to DCN?

Both groups of input fibers of cerebellum (mossy, climbing) start 2 pathways: 1) project directly to the deep nuclei 2) project to cerebellar cortex, which then (after some processing) sends ...
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1answer
145 views

“top-down” and “bottom-up” processes

What kind of processes are "top-down" and "bottom-up" processes in the context of processing visual information in brain? Context: ...There are discrete areas in the visual cortex dedicated to ...
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33 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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0answers
37 views

How common is it for twins conjoined at the head to share thoughts and visual stimuli?

I've always been interested in the possibility of a pair of conjoined twins, joined at the head, being able to read each other's thoughts, react to stimuli that one of them can't see/hear/feel, and ...
5
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1answer
55 views

What are 'gap junctions' (electrical synapses) for?

I was reading this and I found the following sentences: Apart from chemical synapses neurons can also be coupled by electrical synapses, so-called gap junctions. Specialized membrane proteins make ...
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2answers
42 views

Are there models of single neurons on slow timescales?

From what I've come across on the web, most models of single neurons seem to focus on the "fast timescale", where electrical signals are transmitted from one neuron to another. However, neurons are ...
5
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1answer
64 views

Predictive Experiments on Neuroscience of Free Will

It seems to be very interesting that we can use modern neuroscience and cognitive science research to inform us about the ages-old question of free-will vs. determinism. The standard experiment was ...
8
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1answer
102 views

Are the physical sensations of an emotion due to neural activity strictly in the brain or also in the body?

Symptoms of anxiety and anger are often described as some sort of energetic sensation in my chest and sometimes face or arms. Are these sensations an 'illusion' from neural activity strictly in the ...
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1answer
255 views

Does adult neurogenesis occur only in the olfactory bulb and the hippocampus?

The scholarpedia article on this subject says: Adult neurogenesis is the process of generating new neurons which integrate into existing circuits after fetal and early postnatal development ...
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32 views

How are psychological bio-markers discovered?

Recently, this paper claiming to be able to distinguish bipolar disorder from major depressive disorder via a urine sample has come to my attention. Despite reading the paper, I'm unable to ...
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30 views

Results from machine learning converging with results from neuroscience [closed]

I'm currently picking up deep learning, which is a trending method in the field of machine learning that have recently gained fame for breaking various records (for example in image recognition). It ...
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1answer
102 views

Can Transcranial Magnetic Stimulation (TMS), or a magnets cap make you smarter?

According to wikipedia, TMS is a bunch of magnetic fields directed to the brain which stimulates and activates neurons. If I wear a cap full of magnets, will it stimulate my neurons? If yes, will a ...
6
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1answer
84 views

Are the human cerebral hemispheres only connected via the corpus callosum?

Are the human cerebral hemispheres only connected via the corpus callosum? Or is there any other structure for interaction between the left and right hemispheres?
6
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1answer
89 views

How does it come about that specific areas of the brain are associated with specific functions?

During the development of the human brain, specific areas come to perform specific functions. How (and when) does this differentiation come about? Presumably, some areas of the brain naturally take ...
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1answer
46 views

Parasite that takes over cognitive functions [closed]

I am testing an idea for a book. The backbone of the story is that there exists a parasite that can enter the brain of a creature and take over its cognitive functions. I imagine that it could wire ...
6
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2answers
173 views

How do neurons decide how to alter their output signals?

In computer science, neural networks are trained using backpropagation and other methods. Backpropagation heavily relies on mathematical formulas to describe how the weights should be changed ...
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2answers
1k views

What is the role of Chloride (Cl- ions) in membrane potential?

This Membrane Potential article mentions only that Cl- ion is used to model inhibitory GABA synapses. Does it have another role besides hyper-polarizing the cell due to inhibitory neurotransmitter ...
6
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1answer
96 views

Could ketosis be therapeutic for ADHD based on the neuro-energetic theory of attention?

I'm a complete neuroscience novice so please bear with me. One of the more interesting theories of the etiology of ADHD that I've read posits that the disorder may be one of neuroenergetics - the ...
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1answer
54 views

Unified Theory of the Human Brain [closed]

I'm a junior researcher(Life Sciences undergraduate) starting out in computational genetics of neuroscience, and I want to create a Unified Theory/Computational Model of the human brain and all its ...
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0answers
107 views

Lifelong avoidance coping style [closed]

Suppose someone has been using avoidance coping style for most of his or her life. The avoidance tendency is present in a broad range of situations, relatively constant through his or her life, not ...
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2answers
80 views

Are action potentials necessary for experience?

We know that, for example, during brain surgery, electrical stimulation in certain parts of the cortex is sufficient for experience, and result in reportable experiences in human subjects. We also ...
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1answer
140 views

Is there a biological limit for “amount” of happiness?

I have heard about neurotransmitters like dopamin and serotonin that are supposed to play a role in our feeling of happiness. I don't know how these chemicals works in our brain, but I am thinking ...
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0answers
53 views

What personality traits correlate with estrogen?

I'm looking for psychological traits that are proved to correlate with estrogen levels. Anything of specific behavior, attitudes, life styles, emotions, preferences, you name it. (I'm looking for ...
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0answers
39 views

How does oxygen deprivation affect neural activity?

It is increasingly common for someone to regain a heartbeat after a cardiac arrest. During the time that the person is without a heartbeat, and so without circulation, the brain is deprived of oxygen. ...
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1answer
49 views

Does synesthesia lack symmetry?

Some synesthetes report seeing bright flashes when hearing a loud noise. However, in the same person, bright flashes of light are not reported as being loud. I've read of other examples like this; ...