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The study of the structure and function of the nervous system and its components.

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How does the form of a neuron cell change when it dies?

The question is meant for all of the cases when there is apoptosis, necrosis, or freezing.
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0answers
11 views

Once neurotransmitters bind to its receptors, how does the post synaptic neuron “know” when to start a new action potential?

My textbook seems to gloss over this subject. Once the post-synaptic receptors are activated, do they cause particular ion channels to open, letting positive charge into the cell and inching the ...
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1answer
14 views

What happens in a brain of a person suffering with apathy?

Could you describe what happens in the brain (on the level of neuroreceptors) of a person suffering with a lack of motivation (or apathy)? And how does it look in the healthy brain?
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2answers
34 views

What is Modulation Power Spectrum?

I'm reading this paper https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4562283/ , but I cannot make sense of what MPS nor how should I read the pictures that make use of this method. The authors say ...
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0answers
18 views

Can we really command insects using low frequency? [on hold]

Atleast left or right turn? I'm not talking about full control like antman but you know at least a little?
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1answer
30 views

Abrupt movements of birds and reptiles vs. smooth movements of mammals

How can it be explained (in evolutionary and/or neuronal terms), that the spontaneous movements of birds and reptiles are seemingly "abrupt" and not so "smooth": Their spontaneous movements seem to ...
0
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1answer
52 views

Can a genetic male be born with the brain pre-wiring normally found in the female of the same species in normal conditions?

At birth in all species I believe there is some pre-wiring. They are not entirely 'blank slates'. Some species' behaviour from birth, without learning, differs (sometimes significantly) between males ...
5
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0answers
46 views

Can cognitive functioning of the human brain change the physical state of the brain?

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 ...
2
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1answer
12 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 ...
22
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3answers
8k views

Do oysters feel pain?

Do oysters feel pain when you bite into the inside, or when you crack open the shell? I tried google searching it to no avail. When you bite inside the oyster or when you break the shell to open the ...
2
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0answers
15 views

What is the signal that indicates which neurons Schwann cells should myelinate versus which should remain unmyelinated?

Schwann cells are neuroglial cells that produce myelin in the peripheral nervous system. However, not all axons are myelinated - some will remain unmyelinated. There must be some signal that ...
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2answers
13 views

How to determine if the amount of manganese chloride will change neural resting potential

If I am treating an organism in MnCl2 dissolved in water, how do I determine if the amount of Cl (in MnCl2) will change the neural resting potential Oor if it will influence motoneurons?
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0answers
12 views

VC06 neuron of c.elegans

My understanding was that all neurons and their synapses of worm c.elegans are already listed. As source of this map I'm using following databases (both should contain same information): ...
4
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1answer
58 views

Why are the hormones dopamine, adrenaline, noradrenaline and serotonin so ubiquitous across the animal kingdom?

As far as I know there is no reason for the makeup of a given hormone to be universal as it merely serves as a carrier from one part of the brain to another. So why are the above hormones seen across ...
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1answer
26 views

loops in neuron synapses

If we see at the connectome of c.elegans, it is easy to find "loops", in the simplest case, a neuron that synapses to another and this one backward to the first. By example, neuron RIAR has 13 ...
2
votes
1answer
32 views

Why there is no neurovascular drug-eluting stent?

I'm researching on neurovascular stents and I'm wondering why there is not much about drug-eluting neurovascular flow diverters in the literature? I read in an article that it's because of complex ...
1
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1answer
23 views

What is the mechanism behind the F-Wave?

Can someone explain the actual mechanism behind the F-wave? Is it really different from a H-reflex response or does it just have another name for historical reasons? The H-reflex (Hoffmann's reflex) ...
4
votes
1answer
74 views

How exactly does sensory substitution work?

Sensory substitution, when one of sensory modality changes into another sensory modality to help someone restore the ability to perceive defective sensory using a working sensory modality. For example,...
2
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1answer
50 views

Volley theory and sound amplitude/power

Assume a pure tone (single frequency) is listen, lets say 2 kHz. If I understand correctly the temporal theory (aka timing theory), in a cochlea neuron the action potentials create a signal that will ...
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2answers
370 views

Neuron connectivity- how are they connected physically

If Neurons are only connected through synapse and there is no physical connection, how are they just suspended in brain layers?
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3answers
5k views

Can one see flickering of a light bulb at 50 Hz?

Yesterday I had a BBQ with some friends. The sun had already set and the only light source left (besides some ambient light from the world around) was a low energy light bulb. After a while I started ...
2
votes
1answer
25 views

What is the signal conversion from hair cells to cochlear nerve cells?

If I understood correctly, inner hair cells generates a graded potential (receptor potential), this potential maps the stereocilia deflection. On the other hand, the cochlear nerve cells transmit ...
1
vote
1answer
50 views

Are there humans which the brain sends signals to the limbs faster than the average?

I have done some researches on the time taken by the brain to send signals, but I didn't find whether that time is the same amongst all humans or there are some differences, and I have based my ...
2
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1answer
30 views

İrreversible dopamine antagonist vs. Dopamine agonist

Can a dopamine agonist reverse the effects of an irreversible dopamine antagonist?
2
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1answer
31 views

Is every neurotransmitter receptor an ion channel?

This is a rudimentary question--perhaps the answer is well known to biologists, but is every neurotransmitter receptor also an ion channel? For example, NMDAR is a glutamate receptor and cation ...
2
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0answers
37 views

Why do new atypical antipsychotics like Zyprexa cause TD at lower rates?

When the d2 receptors are blocked for long periods of time they tend to up regulate. This is what causes tardive dyskinesia. Why do the newer atypical anti psychotics cause such at a lower rate? ...
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1answer
34 views

Neuroscience - A neuron with two types of synapses (electrical and chemical) at the same time

I learn that the nerves from the Peripheral Nervous System can carry signals from and to other organs of the body. I'm wondering if A Single Nerve carries 1) Only chemical signals 2) Only physical ...
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2answers
59 views

Ambiguity about the relation between membrane potential and concentration gradient in neuron cells

I am stuck in an ambiguity about the equilibrium potentials of neuron cells. The following text is picked up from khanacademy website: In one part it is said that: We'll start out with K at a higher ...
1
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1answer
45 views

What is an “Alternative Sensation”?

As far as I know, alternative sensation it's a sensation to distract people from the original stimuli, for example when you have to get an injection, the nurse will pinch you in the other arms so your ...
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0answers
41 views

What causes dreams to happen?

I've heard that dreams can be influenced by what happens in our daily lives. There are many theories about why we dream, but no one knows for sure. Some researchers say dreams have no purpose or ...
4
votes
1answer
61 views

What exactly does Curare do to the peripheral nervous system?

so, I was told: If you give them the right dosage it'll wear off within an hour or two. It was used for veterinary stuff until they tried it on a human and realized it only paralyzed you and didn'...
1
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1answer
38 views

Is it possible to directly uploaded controlled imagery into a person's conscience?

I was wondering, is it possible to use electrical charges and/or EM waves to induce imagery directly into a person's mind? I got this idea because since almost everybody dreams, and dreams are ...
1
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0answers
35 views

is it possible to use electroshock to temporary stop gross motor functions directly on the neural pathway?

Is it possible to modify that procedure and use it to send a small electroshock on the specific neural pathway and temporarily stop that gross motor function? When the microphone detects unwanted ...
1
vote
1answer
34 views

Results of self-administration study about pain in honeybees?

There research on nih.gov about ability of bees feel pain. But I can't understand their conclusion. Could you provide necessary excerpts here from those study so it would be clear what conclusion they'...
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1answer
28 views

Can we send signals to nerve?

I want to know two things. Can we send a signal to a nerve using external source like electricity? Can we differentiate signals sent from receptors like pain receptors, pressure receptors etc.
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0answers
13 views

Cytoarchitecture v.s. Myeloarchitecture

My understanding is that cytoarchitecture refers to the cellular composition of tissues of the nervous system (here I’m wondering which tissues we are exactly talking about), while myeloarchitecture ...
2
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0answers
56 views

Book recommendation for studying biology for neuroscience [closed]

I will be starting a double degree in neuroscience and mathematics very soon, and I realised that an understanding of human biology can really help me out, and so I'm looking for an introductory level ...
4
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1answer
43 views

How do you check how many cones you have in your eye?

Following my previous question: What color does the other cone in Tetrachromacy correspond to? People with normal color vision posses 3 cones in their eye. But there are some rare cases when people ...
0
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0answers
17 views

Does only one interneuron or upper neuron innervate all lower motor neurons in a muscle?

After reading Kandel I am unclear on this point. I understand that the cell bodies of somatic lower motor neurons cluster in motor nuclei (motor pools) in the ventral horn of gray matter in the spinal ...
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1answer
54 views

Why didn't people taking up the Ice Bucket Challenge die?

I recently came across Vagal Inhibition. That article says, (5) Sudden immersion of body in cold water. can cause vagal inhibition and ultimately death. Recalling the Ice Bucket Challenge. Going ...
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0answers
23 views

Sound volume drop when falling asleep in an airplane

Note: This question has nothing to do with pressure change. When I'm flying in an aircraft at cruising altitude, the monotonous sound often lulls me to sleep. I've noticed that just as I am on the ...
5
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2answers
112 views

Melatonin production, sleep, and “cyan light”; how might this finding be possible?

The BBC News article Cyan colour hidden ingredient in sleep describes research that suggests melatonin levels as measured in saliva could be affected by the presence or absence of cyan color in a ...
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1answer
22 views

What are reciprocal inhibitory synapses?

Quoting Kandel's Principles of Neural Science, 2013, Amacrine cells generally receive excitatory signals from bipolar cells at glutamatergic synapses. Some amacrine cells feed back directly to the ...
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0answers
21 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 ...
0
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0answers
24 views

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 ...
2
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1answer
21 views

What causes the preliminary changes in resting membrane potential in neurons?

Background: The neuron's membrane resting potential is maintained at a certain voltage. The neuron has a lipid bilayer with certain protein channels which allow the movement of ions in both directions ...
3
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0answers
36 views

How can there not be purpose movement in the fetus until week 18 when a fetus can open its mouth and suck its fingers at week 11?

According to Fetal Movement According to an overview produced by the Royal College of Physicians of Edinburgh, purposive movement begins at about 18 weeks, gradually replacing reflex movements ...
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1answer
39 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 ...
42
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2answers
17k views

Why can't we kill ourselves by holding our breath?

Is it possible to kill yourself by holding your breath? This question is obviously copied from Quora, but I had heard it as a fact that we cannot kill ourselves by holding our breath and I'm looking ...
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1answer
165 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 ...