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Questions tagged [neuroscience]

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

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Latency between actual neurons firing and muscles response in open and close fist experiment

I'm trying to analyze the electrocorticograms (ECoG) of opening and closing the fist. I have the data of a glove to capture when the hand moves. I'm struggling with finding the best epoch or segment ...
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1answer
205 views

Understanding Melatonin

Is my understanding roughly correct? Melatonin is 'generated' in the absence of specific wavelengths of light. It accumulates and is only reduced by sleep, in particular REM sleep. Melatonin and ...
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2answers
68 views

How does neuron stimulation work?

Neurons are excited via an external electrode by passing current through it. A neuron at rest is at -70 mV, it needs additional charge amounting to around 15 mV to initiate an action potential. But ...
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1answer
53 views

Why the brain region with less activity is not more responsible for some action?

From my naive understanding, it seems that when people try to find correlations between a human action and a certain pattern of activity in the brain, they measure the brain activity with some device ...
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1answer
256 views

Is it true that stimulants make neurons fire more often, and depressants make them fire less often?

Is it true that stimulants and the neurotransmitters they mimic, push into the synapse, or keep in the synapse (e.g. dopamine, norepinephrine, acetylcholine) make neurons fire more often, while ...
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1answer
710 views

Can color blindness be treated with image filtering technology?

Using image color-filtering techniques we can simulate the way colorblind people see: The aim of this question is to know whether the opposite process could be possible, namely can a colorblind ...
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1answer
1k views

How do congenitally deaf and mute people think?

If a person is born deaf and dumb, how can they think? In "what language" do these people think? Do they develop their own inner language? Unfortunately I have not found an answer, and I actually ...
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4answers
307 views

Why is depression a diagnosable issue?

To me, it seems strange that something such as depression, which anyone can feel at any given time, is diagnosed and treated medically as if it is a mental disorder. I believe depression should be ...
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32 views

How to connect two networks in NEURON software? [closed]

So my goal is to connect STN and SNc neurons by giving synaptic weights and then see the response. I have already modelled STN and SNc separately and observed their response. I need help with the ...
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29 views

Article for bypassing spinal cord after spinal cord injury

This article describes a research that allows a man with spinal cord injury (SCI) at the cervical level to move his finger. A chip was used to circumvent the spinal cord and send signals to the finger ...
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1answer
294 views

where can i find preprocessed fmri data set for alzheimer's disease

I want to work on identification of Alzheimer's patients based on given fMRI data.Basically, I want to implement the following paper https://www.ncbi.nlm.nih.gov/pubmed/25907414. Where can I get ...
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68 views

Good Resources for Learning Modeling of fMRI Data [closed]

As a neuroscience student who works with fMRI I'm competent at the standard univariate analyses and resting state analysis techniques in AFNI and MATLAB/SPM. However, I want to learn how to use models ...
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64 views

People with dead nerves cell, can they feel pain/emotions?

Exactly what the title said, can they feel love/sad/hurt/disgust/fear/etc, emotions, after their neurons are dead? Also are there specific nerves for each emotion that transmits emotion? So let's say ...
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Are there any approaches to measuring “physical”/“neurophysiological” aspects of one's intellectual tone/state of fluid intelligence?

Is it possible to measure/approximate/estimate intelligence with a physiological metric? What I mean is, if I put it correctly: to measure/estimate short-term memory capacity/long-term memory ...
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1answer
37 views

Excitatory impulse speed vs inhibitory

Is there a difference in speed of impulses created by excitatory and inhibitory neurons?
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1answer
362 views

What is the meaning of the peak polarity in EEG data?

I wish to define neuronal activities by analyzing the peaks of each channel in EEG signals. Some papers use the negative peaks as a measure of neuronal activity and others deploy the positive peaks. ...
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151 views

Does training affect the tactile oblique effect?

In the visual sciences it is known that the oblique effect can be reduced by means of training. The oblique effect is observed when testing subjects psychophysically with a grating acuity task (e.g., ...
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1answer
2k views

Difference between the cingulate gyrus and the cingulate cortex

I am doing an analysis of the brain of the Creature in Frankenstein by looking at its actions and experiences from a scientific perspective. For this, I was wondering: What is the difference between ...
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1answer
44 views

Books on Neurological functions?

Are there any books anyone can recommend that do not have any or much in the way of prerequisites but go through the anatomy of the central nervous system while laying out in detail the functions of ...
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1answer
100 views

Activation of brain reasoning areas during dreaming

I would say that dreaming is like any conscious experience, except that objective reasoning is turned off. Do fMRI imaging studies indicate that the reasoning centers of the brain are inactive during ...
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1answer
176 views

What do you call sensations without stimuli?

Sometimes, when you close your eyes in the dark, you see what looks like sparks or flashes. Sometimes when you are tired, your vision seems to shift sideways and realign, like someone bumped into a ...
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1answer
62 views

Searching for real biological neuron firing data [numeric] [closed]

I am searching for real neuron firing data, so I can look at each neuron for fire timing (frequency) and incoming/outgoing signal-strength. I already found short youtube videos of real neuron firing ...
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1answer
342 views

How does the brain project pain on to a particular part of the body?

How does our brain translate periheral sensations due to injuries into pain perceptions? As an in silico analogy - if a stimulus is applied to a sensor it can be transmitted to a microprocessor. The ...
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46 views

Best way to modeling ADHD? [closed]

...with computer models? ( hacking the executive functions of something like this, for making the algorithm more "impulsive", or "inattentive".) ...with animal models? ( using "SHR rat-like", ...
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1answer
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Difference in hemispheres when processing of somatosensory information

We know from many studies (see e.g. Taylor, 2009 for an empirical and experiential overview) that processing of information is massively heterogeneous with respect to hemisphere. How does this ...
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1answer
292 views

Function of heart neural network?

I have found articles the try to give a possible biological neural network for the movement of limbs, neurons in the eyes, etc. Is there an explanation on how the neural network that controls the ...
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1answer
78 views

Is there a complete connectome of a minicolumn of the neocortex?

I know that there are projects that try to map brain connectivity. My question is whether there is a dataset available with the complete connectivity of just a single minicolumn of the neocortex. ...
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1answer
2k views

What is the difference between apparent motion and apparent movement?

A definition for apparent movement is: The perception of movement produced by stimuli that are stationary but are presented first at one position and then, at an appropriate time interval, ...
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1answer
138 views

How does the intravenous administration of cholecystokinin provoke panic attacks?

Background I recently read a paper (The James-Lange theory of emotions: a critical examination and an alternative theory), in which the James-Lange Theory was challenged by Walter Bradford Cannon. ...
6
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1answer
75 views

What causes CSF to flow?

Since matter at rest tends to stay at rest until acted upon, there must be some mechanism in the brain causing cerebrospinal fluid to move from the choroid plexus to other areas of the central nervous ...
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1answer
67 views

How is an action potential conducted across axonal branches in a neuron?

As the action potential travels in the dendrite towards the cell body, it may encounter axonal branches. What happens at the branch? What makes it go to the cell body instead of other dendrite? ...
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3answers
597 views

Are there neural loops within a column or an area of the cortex?

Neuronal networks can make loops because a neuron has a direction (from dendrite to axon). What's the smallest area in the cortex where we can find a loop and what are these loops? I understand ...
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1answer
249 views

What is the neurological basis of bipolar disorder?

Many sources claim that bipolar disorder is associated with problems in the homeostasis of excitatory neurotransmitters. Is this true? What are the leading theories about neurological causes for ...
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4answers
233 views

“Nested Neurons”: Are they biologically plausible?

Is there any evidence for neurons existing within other neurons in humans or other organisms? From what little I've learned about physical neuroscience while learning to build neural nets, I don't see ...
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1answer
181 views

Do cats exhibit the bouba/kiki effect?

I was fascinated when I first read Ramachandran's article about kiki bouba effect, and I was wondering if cats experience the same thing... As Ramachandran proved, our angular gyrus is responsible for ...
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1answer
2k views

Is the Rubin Vase illusion an example of inattentional blindness?

Generally, people looking at an example of a Rubin Vase see either the vase, or the faces. The brain seems to make a decision on which one is being viewed, but both cannot be focused-on at the same ...
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0answers
225 views

What neural mechanism explains the phenomenon that bad memories fade faster than good ones?

Several studies have suggested that negative memories fade faster than positive memories: Walker, Vogl and Thompson (1997) had the subjects kept dairy during a 3-month period, and rated the events on ...
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1answer
258 views

At what impedances should one gold plate 12.5-µm diameter nichrome wire tetrodes for targeting different brain areas?

Extracellular electrophysiological recordings of rodent brains using tetrodes requires plating them with gold solution in order to achieve appropriate impedances. How does the ideal plating ...
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1answer
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What is the proportion of excitatory vs. inhibitory neurons in the feline thalamus?

Is there a scientific reference on the numbers (or proportion) of excitatory and inhibitory neurons in the thalamus of the cat?
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2answers
100 views

Spike Timing Dependent Plasticity interpretation

A paper I'm looking at titled "Synaptic Modifications in Cultured Hippocampal Neurons: Dependence on Spike Timing, Synaptic Strength, and Postsynaptic Cell Type" (can be found here) showed a ...
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3answers
259 views

Thinking with organs/systems other than the brain

Neurohormones are produced in many different bodily systems other than the brain--skin, intestines, stomach, etc. Has there been any research suggesting whether or not some people might actually ...
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0answers
119 views

Is there a tangible benefit of synchronising the sample clock to the laser pulses in a resonant scanning two-photon microscope?

NI data acquisition cards offer a possibility of synchronising data acquisition with the pulses of a 80 MHz Ti:Sapphire laser. This supposedly helps improve the signal to noise ratio, since the true ...
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2answers
121 views

Why is Potassium(K) important to neurology & the brain?

When researching the pharmacological mechanisms of action and interactions that various psychotropic drugs, poisons, neurotoxins, etc. have on the brain: I frequently see off-hand references to the ...
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1answer
76 views

If light travels at c, and the human nervous system's speed/perception speed<c, why aren't we not seeing or blind at some times?

If light travels at c, and the human nervous system is a lot slower than light speed, therefore it would take a lot of time for us to process what we see, why aren't we blind to what's going around us ...
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1answer
322 views

What is the role of (why )universal gas constant in Nernst equation?

The Nernst equation is an equation that relates the the total voltage, i.e. the electromotive force, of the full cell at any point in time to the standard electrode potential, temperature, activity, ...
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1answer
77 views

Membrane resistance of a neuron

I am about to simulate a neuron activity with the "Leaky Integrate and Fire" neuron model. But for that I need the membrane resistance. I was really looking a lot online, but I just cant find a value. ...
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2answers
89 views

Can “fire together, wire together” be undone?

Are new connections continuously forged in the adult human brain, or do we just start all wired together and then prune until we have something we like?
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0answers
28 views

Brain cell temperature [closed]

Given: a brain cell has an average temperature, T. If: perpetual brain activity pattern, X ; has an average conductive resistance, R; Therefore: Could it be rationally assumed that activity ...
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1answer
146 views

Is a network of neurons the only factor in memory?

Background I'm actually writing a science fiction novel set a couple decades in the future. Brains are not my field. I've done as much research as I could. In the story, the protagonist finds out he ...
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Mechanism of ketamine in treatment of depression and anxiety?

What are the mechanisms by which ketamine reduces the symptoms of depression and anxiety?